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Institut für Robuste Leistungshalbleitersysteme
Institut
Team
Schoch, Benjamin

Benjamin Schoch

Herr M.Sc.

Wissenschaftlicher Mitarbeiter
Institut für Robuste Leistungshalbleitersysteme

Kontakt

+49 711 685 67430
E-Mail

Pfaffenwaldring 31
70569 Stuttgart
Deutschland
Raum: 02.206

Publikationen

2022
1. B. Schoch u. a., „Performance Optimization of an E-Band Communication Link using Open-Loop Predistortion“, in 2022 14th German Microwave Conference (GeMiC), 2022, S. 216–219.
  - BibTeX
  BibTeX
  @inproceedings{schoch2022performance, author = {Schoch, Benjamin and Wiewel, Florian and Wrana, Dominik and Manoliu, Laura and Haussmann, Simon and Tessmann, Axel and Kallfass, Ingmar}, booktitle = {2022 14th German Microwave Conference (GeMiC)}, pages = {216-219}, title = {Performance Optimization of an E-Band Communication Link using Open-Loop Predistortion}, year = 2022 }
2. D. Wrana, Y. Leiba, L. John, B. Schoch, A. Tessmann, und I. Kallfass, „Short-Range Full-Duplex Real-Time Wireless Terahertz Link for IEEE802.15.3d Applications“, in 2022 IEEE Radio and Wireless Symposium (RWS), 2022, S. 94–97. doi: 10.1109/RWS53089.2022.9719954.
  - BibTeX
  BibTeX
  @inproceedings{wrana2022shortrange, author = {Wrana, Dominik and Leiba, Yigal and John, Laurenz and Schoch, Benjamin and Tessmann, Axel and Kallfass, Ingmar}, booktitle = {2022 IEEE Radio and Wireless Symposium (RWS)}, doi = {10.1109/RWS53089.2022.9719954}, pages = {94-97}, title = {Short-Range Full-Duplex Real-Time Wireless Terahertz Link for IEEE802.15.3d Applications}, year = 2022 }
3. D. Wrana, L. John, B. Schoch, S. Wagner, und I. Kallfass, „Sensitivity Analysis of a 280–312 GHz Superheterodyne Terahertz Link Targeting IEEE802.15.3d Applications“, IEEE Transactions on Terahertz Science and Technology, Bd. 12, Nr. 4, Art. Nr. 4, 2022, doi: 10.1109/TTHZ.2022.3172008.
  - BibTeX
  BibTeX
  @article{wrana2022sensitivity, author = {Wrana, Dominik and John, Laurenz and Schoch, Benjamin and Wagner, Sandrine and Kallfass, Ingmar}, doi = {10.1109/TTHZ.2022.3172008}, journal = {IEEE Transactions on Terahertz Science and Technology}, number = 4, pages = {325-333}, title = {Sensitivity Analysis of a 280–312 GHz Superheterodyne Terahertz Link Targeting IEEE802.15.3d Applications}, volume = 12, year = 2022 }
4. D. Koch, D. Wrana, B. Schoch, und I. Kallfass, „Low-Noise, 24 V, 1 A, 2.1 MHz GaN DC/DC Converter for Variable Power Supply of a GaN-Based Solid-State Power Amplifier“, in 2022 IEEE Applied Power Electronics Conference and Exposition (APEC), 2022, S. 1208–1213. doi: 10.1109/APEC43599.2022.9773463.
  - BibTeX
  BibTeX
  @inproceedings{koch2022lownoise, author = {Koch, Dominik and Wrana, Dominik and Schoch, Benjamin and Kallfass, Ingmar}, booktitle = {2022 IEEE Applied Power Electronics Conference and Exposition (APEC)}, doi = {10.1109/APEC43599.2022.9773463}, pages = {1208-1213}, title = {Low-Noise, 24 V, 1 A, 2.1 MHz GaN DC/DC Converter for Variable Power Supply of a GaN-Based Solid-State Power Amplifier}, year = 2022 }
5. L. Manoliu u. a., „Measurements of Atmospheric Attenuation in an Outdoor Wireless E/W-Band Communication Link“, in 2022 14th German Microwave Conference (GeMiC), 2022, S. 208–211.
  - BibTeX
  BibTeX
  @inproceedings{manoliu2022measurements, author = {Manoliu, Laura and Henneberger, Ralf and Tessmann, Axel and Seidel, Jochen and Eppard, Michael and Wrana, Dominik and Schoch, Benjamin and Kallfass, Ingmar}, booktitle = {2022 14th German Microwave Conference (GeMiC)}, pages = {208-211}, title = {Measurements of Atmospheric Attenuation in an Outdoor Wireless E/W-Band Communication Link}, year = 2022 }
6. D. Wrana, B. Schoch, L. Manoliu, S. Haußmann, A. Tessmann, und I. Kallfass, „Investigation of the Influence of LO Leakage in an E-Band Quadrature Transmitter“, in 2022 14th German Microwave Conference (GeMiC), 2022, S. 33–36.
  - BibTeX
  BibTeX
  @inproceedings{wrana2022investigation, author = {Wrana, Dominik and Schoch, Benjamin and Manoliu, Laura and Haußmann, Simon and Tessmann, Axel and Kallfass, Ingmar}, booktitle = {2022 14th German Microwave Conference (GeMiC)}, pages = {33-36}, title = {Investigation of the Influence of LO Leakage in an E-Band Quadrature Transmitter}, year = 2022 }
7. B. Schoch u. a., „E-Band Transmitter with 3 W Complex Modulated Signal Output Power Performance“, in 2021 51st European Microwave Conference (EuMC), 2022, S. 458–461. doi: 10.23919/EuMC50147.2022.9784314.
  - BibTeX
  BibTeX
  @inproceedings{schoch2022eband, author = {Schoch, Benjamin and Wrana, Dominik and Henneberger, Ralf and Wagner, Sandrine and Ture, Erdin and Tessmann, Axel and Kallfass, Ingmar}, booktitle = {2021 51st European Microwave Conference (EuMC)}, doi = {10.23919/EuMC50147.2022.9784314}, pages = {458-461}, title = {E-Band Transmitter with 3 W Complex Modulated Signal Output Power Performance}, year = 2022 }
8. D. Wrana, L. John, B. Schoch, S. Wagner, und I. Kallfass, „Short Range Wireless Transmission Using a 295–315 GHz Superheterodyne Link Targeting IEEE802.15.3d Applications“, in 2021 51st European Microwave Conference (EuMC), 2022, S. 205–208. doi: 10.23919/EuMC50147.2022.9784217.
  - BibTeX
  BibTeX
  @inproceedings{wrana2022short, author = {Wrana, Dominik and John, Laurenz and Schoch, Benjamin and Wagner, Sandrine and Kallfass, Ingmar}, booktitle = {2021 51st European Microwave Conference (EuMC)}, doi = {10.23919/EuMC50147.2022.9784217}, pages = {205-208}, title = {Short Range Wireless Transmission Using a 295–315 GHz Superheterodyne Link Targeting IEEE802.15.3d Applications}, year = 2022 }
2021
1. H. Ghanem u. a., „Non-linear analysis of a Broadband Power Amplifier at 300 GHz“, in 2020 15th European Microwave Integrated Circuits Conference (EuMIC), 2021, S. 209–212.
  - BibTeX
  BibTeX
  @inproceedings{ghanem2021nonlinear, author = {Ghanem, Haitham and Schoch, Benjamin and Kallfass, Ingmar and Szriftgiser, Pascal and Zegaoui, Malek and Zaknoune, Mohammed and Danneville, François and Ducournau, Guillaume}, booktitle = {2020 15th European Microwave Integrated Circuits Conference (EuMIC)}, pages = {209-212}, title = {Non-linear analysis of a Broadband Power Amplifier at 300 GHz}, year = 2021 }
2. B. Schoch, A. Tessmann, A. Leuther, P. Szriftgiser, G. Ducournau, und I. Kallfass, „Two-Tone Intermodulation Performance of a 300GHz Power Amplifier MMIC“, in 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), 2021, S. 16–19. doi: 10.1109/PAWR51852.2021.9375586.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  Intermodulation effects play a decisive role in any system relying on the linear transmission of signals, such as highspeed wireless communication. For the first time, this paper presents measured third-order and fifth-order intermodulation performance of a 300GHz monolithic integrated circuit with a new photonic approach. Conventional amplifier characterization in this frequency range showed a small-signal gain of more than 15dB, operating frequency range from 279 to 313GHz, and a 1dB compression point and saturated output power of 1.6dBm and 6dBm, respectively, from a one-tone power sweep. Using a novel photonic-based measurement setup, the amplifiers' output-related IP3 and IP5 are measured to 13dBm and 11dBm, respectively. The two-tone measurement uses the photonic mixing of three laser lines to generate the two-beat frequencies at 299 and 301GHz.
  BibTeX
  @inproceedings{schoch2021twotone, abstract = {Intermodulation effects play a decisive role in any system relying on the linear transmission of signals, such as highspeed wireless communication. For the first time, this paper presents measured third-order and fifth-order intermodulation performance of a 300GHz monolithic integrated circuit with a new photonic approach. Conventional amplifier characterization in this frequency range showed a small-signal gain of more than 15dB, operating frequency range from 279 to 313GHz, and a 1dB compression point and saturated output power of 1.6dBm and 6dBm, respectively, from a one-tone power sweep. Using a novel photonic-based measurement setup, the amplifiers' output-related IP3 and IP5 are measured to 13dBm and 11dBm, respectively. The two-tone measurement uses the photonic mixing of three laser lines to generate the two-beat frequencies at 299 and 301GHz.}, author = {Schoch, Benjamin and Tessmann, Axel and Leuther, Arnulf and Szriftgiser, Pascal and Ducournau, Guillaume and Kallfass, Ingmar}, booktitle = {2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)}, doi = {10.1109/PAWR51852.2021.9375586}, issn = {2473-4640}, month = jan, pages = {16-19}, title = {Two-Tone Intermodulation Performance of a 300GHz Power Amplifier MMIC}, year = 2021 }
3. L. Manoliu, B. Schoch, M. Koller, J. Wieczorek, S. Klinkner, und I. Kallfass, „High-speed FPGA-Based Payload Computer for an In-Orbit Verification of a 71–76 GHz Satellite Downlink“, in 2021 IEEE Space Hardware and Radio Conference (SHaRC), 2021, S. 21–24. doi: 10.1109/SHaRC51853.2021.9375827.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  This paper introduces the system architecture, implementation and measured characterization of the FPGA-based adaptive onboard payload computer used for an in-orbit verification of an E-band high bandwidth communication system. The mission goal is to evaluate the atmospheric effects on a multiGigabit data-downlink, in the frequency range of 71-76 GHz with a data rate of minimum 10 Gbit/s, from a 6U CubeSat in low earth orbit to a ground station. The miniaturized onboard payload computer in conjunction with a fast digital-to-analog converter shall serve as an arbitrary waveform generator and as image processing unit.
  BibTeX
  @inproceedings{manoliu2021highspeed, abstract = {This paper introduces the system architecture, implementation and measured characterization of the FPGA-based adaptive onboard payload computer used for an in-orbit verification of an E-band high bandwidth communication system. The mission goal is to evaluate the atmospheric effects on a multiGigabit data-downlink, in the frequency range of 71-76 GHz with a data rate of minimum 10 Gbit/s, from a 6U CubeSat in low earth orbit to a ground station. The miniaturized onboard payload computer in conjunction with a fast digital-to-analog converter shall serve as an arbitrary waveform generator and as image processing unit.}, author = {Manoliu, Laura and Schoch, Benjamin and Koller, Markus and Wieczorek, Jens and Klinkner, Sabine and Kallfass, Ingmar}, booktitle = {2021 IEEE Space Hardware and Radio Conference (SHaRC)}, doi = {10.1109/SHaRC51853.2021.9375827}, month = jan, pages = {21-24}, title = {High-speed FPGA-Based Payload Computer for an In-Orbit Verification of a 71–76 GHz Satellite Downlink}, year = 2021 }
4. I. Kallfass u. a., „Towards the Exploratory In-Orbit Verification of an E/W-Band Satellite Communication Link“, in 2021 IEEE MTT-S International Wireless Symposium (IWS), 2021, S. 1–3. doi: 10.1109/IWS52775.2021.9499586.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  This contribution details the motivation and the status of a new satellite mission, which targets the in-orbit verification of a wideband satellite communication link operating in the high millimeter-wave regime at 71-76 GHz. The paper reviews the dynamic link budgets for data links between satellites in low-earth orbits and ground stations on close to sea level, taking into account the expected atmospheric attenuation according to lTU models and supported by successful terrestrial transmission experiments, which confirm the feasibility and attractiveness of exploiting allocated spectrum in E-band for Gigabit satellite feeder links of globe-spanning satellite constellations and high capacity data downlinks in earth observation, even under adverse weather conditions. The scientific payload, hosted by a 6V-Cubsat platform, comprises a high-performance E-band transmitter with GaN-based solid state power amplifiers, an InGaAs-based low-noise receiver and a modern FPGA-based digital processing unit realizing AWG functionality and 4k image/video storage. The ground terminal employs a highly directive Cassegrain antenna with coarse GPS and fine RF tracking and a low-noise receiver.
  BibTeX
  @inproceedings{kallfass2021towards, abstract = {This contribution details the motivation and the status of a new satellite mission, which targets the in-orbit verification of a wideband satellite communication link operating in the high millimeter-wave regime at 71-76 GHz. The paper reviews the dynamic link budgets for data links between satellites in low-earth orbits and ground stations on close to sea level, taking into account the expected atmospheric attenuation according to lTU models and supported by successful terrestrial transmission experiments, which confirm the feasibility and attractiveness of exploiting allocated spectrum in E-band for Gigabit satellite feeder links of globe-spanning satellite constellations and high capacity data downlinks in earth observation, even under adverse weather conditions. The scientific payload, hosted by a 6V-Cubsat platform, comprises a high-performance E-band transmitter with GaN-based solid state power amplifiers, an InGaAs-based low-noise receiver and a modern FPGA-based digital processing unit realizing AWG functionality and 4k image/video storage. The ground terminal employs a highly directive Cassegrain antenna with coarse GPS and fine RF tracking and a low-noise receiver.}, author = {Kallfass, I. and Manoliu, L. and Schoch, B. and Koller, M. and Klinkner, S. and Freese, J. and Tessmann, A. and Henneberger, R.}, booktitle = {2021 IEEE MTT-S International Wireless Symposium (IWS)}, doi = {10.1109/IWS52775.2021.9499586}, month = may, pages = {1-3}, title = {Towards the Exploratory In-Orbit Verification of an E/W-Band Satellite Communication Link}, year = 2021 }
2020
1. L. Manoliu, B. Schoch, und I. Kallfass, „FPGA Based Reconfigurable On-Board Payload Processing for an Exploratory In-Orbit Verification of an E-Band (71-76 GHz) Satellite Link (EIVE)“, in Proc. 5th ESA SpacE FPGA Users Workshop, Noordwijk, 2020.
  - BibTeX
  BibTeX
  @article{Manoliu_ESA2020, author = {Manoliu, L. and Schoch, B. and Kallfass, I.}, date-added = {2019-12-21 15:20:22 +0100}, date-modified = {2019-12-21 15:22:17 +0100}, journal = {in Proc. 5th ESA SpacE FPGA Users Workshop, Noordwijk}, month = {Mar.}, title = {{FPGA Based Reconfigurable On-Board Payload Processing for an Exploratory In-Orbit Verification of an E-Band (71-76 GHz) Satellite Link (EIVE)}}, year = 2020 }
2. B. Schoch, A. Tessmann, S. Wagner, und I. Kallfass, „E-band Balanced Broadband Driver Amplifier MMIC with 1.8 THz Gain-Bandwidth Product“, in 2020 13th German Microwave Conference (GeMiC), 2020, S. 9–12.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  This paper presents an E-band (60 - 90GHz) balanced driver amplifier in a 50nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a millimeter-wave monolithic integrated circuit and is designed to drive a high power output stage in a multi-gigabit communication system. The three stage driver amplifier is balanced via 90° hybrid Lange couplers. To track the power levels, especially to fulfill regulated power density requirements, a detector was placed at the output of the amplifier. On-wafer measurements were performed and a maximum gain of 35dB at 66GHz could be achieved. Between 60 to 90GHz a gain greater than 30dB could be measured which results in a gain-bandwidth product of 1.8THz. With four parallel common source transistors in the output stage a maximum output power of 14.5dBm at 73.5GHz could be reached.
  BibTeX
  @inproceedings{Schoch_GeMIC2020, abstract = {This paper presents an E-band (60 - 90GHz) balanced driver amplifier in a 50nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a millimeter-wave monolithic integrated circuit and is designed to drive a high power output stage in a multi-gigabit communication system. The three stage driver amplifier is balanced via 90° hybrid Lange couplers. To track the power levels, especially to fulfill regulated power density requirements, a detector was placed at the output of the amplifier. On-wafer measurements were performed and a maximum gain of 35dB at 66GHz could be achieved. Between 60 to 90GHz a gain greater than 30dB could be measured which results in a gain-bandwidth product of 1.8THz. With four parallel common source transistors in the output stage a maximum output power of 14.5dBm at 73.5GHz could be reached.}, author = {Schoch, B. and Tessmann, A. and Wagner, S. and Kallfass, I.}, booktitle = {2020 13th German Microwave Conference (GeMiC)}, isbn = {978-3-9820-3971-8}, issn = {2167-8022}, month = {March }, pages = {9-12}, title = {{E-band Balanced Broadband Driver Amplifier MMIC with 1.8 THz Gain-Bandwidth Product}}, year = 2020 }
3. B. Schoch, S. Chartier, U. Mohr, M. Koller, S. Klinkner, und I. Kallfass, „Towards a CubeSat Mission for a Wideband Data Transmission in E-Band“, in 2020 IEEE Space Hardware and Radio Conference (SHaRC), 2020, S. 16–19. doi: 10.1109/SHaRC47220.2020.9034007.
  Zusammenfassung
  This paper presents ongoing activities towards an in-orbit verification of an E-band high bandwidth communication system to exploit a new spectrum for broadband satellite communication by demonstrating a data-downlink, using solid state technologies for the RF analog transmit front end, in the frequency range of 71-76 GHz with a data rate of 5 Gbit/s from a three-axis stabilized 6U nano-satellite in low earth orbit to a ground station. A recent plane-to-ground data transmission has successfully validated the technology platform, and dynamic link budgets suggest the feasibility of LEO to ground links exploiting E-band frequencies.
  BibTeX
  @inproceedings{9034007, abstract = {This paper presents ongoing activities towards an in-orbit verification of an E-band high bandwidth communication system to exploit a new spectrum for broadband satellite communication by demonstrating a data-downlink, using solid state technologies for the RF analog transmit front end, in the frequency range of 71-76 GHz with a data rate of 5 Gbit/s from a three-axis stabilized 6U nano-satellite in low earth orbit to a ground station. A recent plane-to-ground data transmission has successfully validated the technology platform, and dynamic link budgets suggest the feasibility of LEO to ground links exploiting E-band frequencies.}, author = {{Schoch}, B. and {Chartier}, S. and {Mohr}, U. and {Koller}, M. and {Klinkner}, S. and {Kallfass}, I.}, booktitle = {2020 IEEE Space Hardware and Radio Conference (SHaRC)}, doi = {10.1109/SHaRC47220.2020.9034007}, month = jan, pages = {16-19}, title = {Towards a CubeSat Mission for a Wideband Data Transmission in E-Band}, url = {https://ieeexplore.ieee.org/document/9034007/}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9034007/
2019
1. I. Kallfass u. a., „High System Gain E-Band Link in a Wideband Aircraft-to-Ground Data Transmission“, in 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2019, S. 1–5. doi: 10.1109/COMCAS44984.2019.8958387.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  A wireless communication link operating in E-band at 71-76 GHz with 30 dBm of transmit power from a GaN-based solid-state power amplifier and a 3-dB noise Figure of its GaAs-based receiver is employed in a data transmission with up to 9.8 Gbit/s data rate between a plane and a ground station. Flying at a height of 1000 m above ground and at distances between 5 and 12 km from the receiver, a microlight aircraft hosts the payload mounted to its wing. The highly directional link is formed by a 39.7 dBi gain Cassegrain parabolic antenna in the plane-mounted transmitter, and a 48.7 dBi Cassegrain antenna with GPS-based antenna tracking in the ground terminal. Stable data links were established with up to 9.8 Gbit/s data rate employing QPSK, 8-PSK and 16-QAM modulation.
  BibTeX
  @inproceedings{kallfass2019system, abstract = {A wireless communication link operating in E-band at 71-76 GHz with 30 dBm of transmit power from a GaN-based solid-state power amplifier and a 3-dB noise Figure of its GaAs-based receiver is employed in a data transmission with up to 9.8 Gbit/s data rate between a plane and a ground station. Flying at a height of 1000 m above ground and at distances between 5 and 12 km from the receiver, a microlight aircraft hosts the payload mounted to its wing. The highly directional link is formed by a 39.7 dBi gain Cassegrain parabolic antenna in the plane-mounted transmitter, and a 48.7 dBi Cassegrain antenna with GPS-based antenna tracking in the ground terminal. Stable data links were established with up to 9.8 Gbit/s data rate employing QPSK, 8-PSK and 16-QAM modulation.}, author = {Kallfass, I. and Henneberger, R. and Sommer, R. and Harati, P. and Dilek, S.M. and Schoch, B. and Eisenbeis, J. and Marahrens, Sören and Palm, Stephan and Tessmann, A.}, booktitle = {2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)}, doi = {10.1109/COMCAS44984.2019.8958387}, month = nov, pages = {1-5}, title = {High System Gain E-Band Link in a Wideband Aircraft-to-Ground Data Transmission}, year = 2019 }
2. S. M. Dilek, B. Schoch, und I. Kallfass, „Performance Analysis of Real-Time Full-Duplex E-band Link“, in 2019 49th European Microwave Conference (EuMC), 2019, S. 976–979. doi: 10.23919/EuMC.2019.8910936.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  In this paper, a performance analysis of a full-duplex E-band link is reported. The transmission system is operated with a real-time capable modem as a digital signal processing unit with broadband mixed-signal blocks. The measurement has been done with a 1.425 gigabaud-per-second data rate transmission for higher order modulations. A raised-cosine pulse-shaping filter is used with a 0.5 roll-off factor. A residual bit-error-rate which is below the forward-error correction limit is measured. The uplink (81–86 GHz band) transceiver and the downlink (71–76 GHz band) transceiver of the E-band duplex-link provide a 64-QAM transmission which has a 7.5 gigabit-per-second data-rate with a back-to-back configured setup. The 32-QAM and the 16-QAM which provide 6.2 and 5 gigabit-per-second data transmission, respectively are analyzed as well. The paper analyzes the influence of the main analog front-end impairments, noise and amplifier compression, including a real-time capable modem sensitivity over the entire full-duplex E-band communication system performance, i.e. their upper and lower threshold limit for the received power, for different modulation formats and relates these limits to the power compression of the analog frontend's transfer characteristics.
  BibTeX
  @inproceedings{dilek2019performance, abstract = {In this paper, a performance analysis of a full-duplex E-band link is reported. The transmission system is operated with a real-time capable modem as a digital signal processing unit with broadband mixed-signal blocks. The measurement has been done with a 1.425 gigabaud-per-second data rate transmission for higher order modulations. A raised-cosine pulse-shaping filter is used with a 0.5 roll-off factor. A residual bit-error-rate which is below the forward-error correction limit is measured. The uplink (81–86 GHz band) transceiver and the downlink (71–76 GHz band) transceiver of the E-band duplex-link provide a 64-QAM transmission which has a 7.5 gigabit-per-second data-rate with a back-to-back configured setup. The 32-QAM and the 16-QAM which provide 6.2 and 5 gigabit-per-second data transmission, respectively are analyzed as well. The paper analyzes the influence of the main analog front-end impairments, noise and amplifier compression, including a real-time capable modem sensitivity over the entire full-duplex E-band communication system performance, i.e. their upper and lower threshold limit for the received power, for different modulation formats and relates these limits to the power compression of the analog frontend's transfer characteristics.}, author = {Dilek, Seyyid M. and Schoch, Benjamin and Kallfass, Ingmar}, booktitle = {2019 49th European Microwave Conference (EuMC)}, doi = {10.23919/EuMC.2019.8910936}, month = oct, pages = {976-979}, title = {Performance Analysis of Real-Time Full-Duplex E-band Link}, year = 2019 }
3. B. Schoch, L. Manoliu, J. Keim, S. Chartier, S. Klinkner, und I. Kallfass, „Link budget analysis of E- and W-band satellite services“, in 25th Ka and Broadband Communications Conference, Sorrento, S. 1--8, 2019.
  - Zusammenfassung
  - BibTeX
  Zusammenfassung
  This work describes the dynamic link budgets arising in ultra-high data rate satellite communication links in the E- and W-band operating in low earth orbits (LEO). The calculations take into account all available ITU models for atmospheric effects, the current state of the art in achievable system gain, i.e. transmit power and receiver sensitivity, prospective antenna realisations, and arbitrary low-earth orbits and locations of ground terminals. In this work, we calculate link-budgets for different LEO scenarios for defined ground stations. The communication systems are described on a high-level basis, where it is possible to estimate the link quality and capacity. The communication system is derived from state-of-art performance of E/W-band components. Antenna sizes, pointing accuracy and probability densities are taken into account to describe a full satellite mission with focus on the communication channel. A time dependent SNR can be estimated to calculate thresholds for modulation formats and link reliability. Calculation are made to predict the energy per useful bit to noise density ratio (E b /N 0 ) for a LEO- satellite pass through the zenith at an orbit altitude of 400 km. Finally, the achievable data volume can be estimated for each atmospheric situation, e.g. weather condition, which can be offloaded from the satellite.
  BibTeX
  @article{Schoch_Ka-Band2019, abstract = {This work describes the dynamic link budgets arising in ultra-high data rate satellite communication links in the E- and W-band operating in low earth orbits (LEO). The calculations take into account all available ITU models for atmospheric effects, the current state of the art in achievable system gain, i.e. transmit power and receiver sensitivity, prospective antenna realisations, and arbitrary low-earth orbits and locations of ground terminals. In this work, we calculate link-budgets for different LEO scenarios for defined ground stations. The communication systems are described on a high-level basis, where it is possible to estimate the link quality and capacity. The communication system is derived from state-of-art performance of E/W-band components. Antenna sizes, pointing accuracy and probability densities are taken into account to describe a full satellite mission with focus on the communication channel. A time dependent SNR can be estimated to calculate thresholds for modulation formats and link reliability. Calculation are made to predict the energy per useful bit to noise density ratio (E b /N 0 ) for a LEO- satellite pass through the zenith at an orbit altitude of 400 km. Finally, the achievable data volume can be estimated for each atmospheric situation, e.g. weather condition, which can be offloaded from the satellite.}, author = {Schoch, B. and Manoliu, L. and Keim, J. and Chartier, S. and Klinkner, S. and Kallfass, I.}, journal = {in 25th Ka and Broadband Communications Conference, Sorrento}, pages = {1--8}, title = {{Link budget analysis of E- and W-band satellite services}}, year = 2019 }
4. I. Dan u. a., „A 300GHz Quadrature Down-Converter S-MMIC for Future Terahertz Communication“, in 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2019, S. 1–6. doi: 10.1109/COMCAS44984.2019.8958300.
  Zusammenfassung
  This paper presents a highly broadband quadrature down-converter with a center frequency of 300GHz and a low-noise amplifier (LNA) with a bandwidth of 80GHz. The operation frequency between 235GHz and 315GHz enables the usage in future wireless high data rate applications. The submillimeter-wave monolithic integrated circuits (S-MMICs) are realized using a 35nm metamorphic high electron mobility transistor (mHEMT) technology based on InAlAs/InGaAs. The down-converter integrates a frequency multiplier by four, a buffer amplifier and a passive fundamental I/Q mixer and reaches a conversion gain of -15dB and an RF bandwidth of 60GHz. The low-noise amplifier has an average gain of 26dB over the 3dB bandwidth. A total conversion gain of the receiver of 11dB is therefore reached by combining the down-converter and the LNA.
  BibTeX
  @inproceedings{dan2019300ghz, abstract = {This paper presents a highly broadband quadrature down-converter with a center frequency of 300GHz and a low-noise amplifier (LNA) with a bandwidth of 80GHz. The operation frequency between 235GHz and 315GHz enables the usage in future wireless high data rate applications. The submillimeter-wave monolithic integrated circuits (S-MMICs) are realized using a 35nm metamorphic high electron mobility transistor (mHEMT) technology based on InAlAs/InGaAs. The down-converter integrates a frequency multiplier by four, a buffer amplifier and a passive fundamental I/Q mixer and reaches a conversion gain of -15dB and an RF bandwidth of 60GHz. The low-noise amplifier has an average gain of 26dB over the 3dB bandwidth. A total conversion gain of the receiver of 11dB is therefore reached by combining the down-converter and the LNA.}, author = {{Dan}, I. and {Grötsch}, C. M. and {Schoch}, B. and {Wagner}, S. and {John}, L. and {Tessmann}, A. and {Kallfass}, I.}, booktitle = {2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)}, doi = {10.1109/COMCAS44984.2019.8958300}, month = nov, pages = {1-6}, title = {A 300GHz Quadrature Down-Converter S-MMIC for Future Terahertz Communication}, url = {https://ieeexplore.ieee.org/document/8958300/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8958300/
5. C. M. Grotsch, B. Schoch, S. Wagner, und I. Kallfass, „A Highly Linear FMCW Radar Chipset in H-Band with 50 GHz Bandwidth“, in 2019 IEEE MTT-S International Microwave Symposium (IMS), 2019, S. 646–649. doi: 10.1109/MWSYM.2019.8700906.
  Zusammenfassung
  In this paper we present a transmit and receive MMIC for FMCW radar. The transmitter consisting of a frequency multiplier-by-three and a power amplifier featuring a high output power of 7 dBm with a 60 GHz 3-dB RF-bandwidth. The receiver is designed to be highly linear over a LO and RF bandwidth from 235 to 285 GHz. It employs a frequency tripler and a power amplifier as driver stage for a passive I/Q downconverter which enables an image reject architecture. To ensure linear operation and improve the overall receiver noise an input amplifier stage with an input referred 1-dB compression point exceeding -3 dBm is also integrated. The chipset is realized in a 35 nm metamorphic high electron mobility transistor technology.
  BibTeX
  @inproceedings{grotsch2019highly, abstract = {In this paper we present a transmit and receive MMIC for FMCW radar. The transmitter consisting of a frequency multiplier-by-three and a power amplifier featuring a high output power of 7 dBm with a 60 GHz 3-dB RF-bandwidth. The receiver is designed to be highly linear over a LO and RF bandwidth from 235 to 285 GHz. It employs a frequency tripler and a power amplifier as driver stage for a passive I/Q downconverter which enables an image reject architecture. To ensure linear operation and improve the overall receiver noise an input amplifier stage with an input referred 1-dB compression point exceeding -3 dBm is also integrated. The chipset is realized in a 35 nm metamorphic high electron mobility transistor technology.}, author = {{Grotsch}, C. M. and {Schoch}, B. and {Wagner}, S. and {Kallfass}, I.}, booktitle = {2019 IEEE MTT-S International Microwave Symposium (IMS)}, doi = {10.1109/MWSYM.2019.8700906}, issn = {2576-7216}, month = {June}, pages = {646-649}, title = {A Highly Linear FMCW Radar Chipset in H-Band with 50 GHz Bandwidth}, url = {https://ieeexplore.ieee.org/document/8700906/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8700906/
6. S. M. Dilek, B. Schoch, und I. Kallfass, „Performance Analysis of Real-Time Full-Duplex E-band Link“, in 2019 49th European Microwave Conference (EuMC), 2019, S. 976–979. doi: 10.23919/EuMC.2019.8910936.
  Zusammenfassung
  In this paper, a performance analysis of a full-duplex E-band link is reported. The transmission system is operated with a real-time capable modem as a digital signal processing unit with broadband mixed-signal blocks. The measurement has been done with a 1.425 gigabaud-per-second data rate transmission for higher order modulations. A raised-cosine pulse-shaping filter is used with a 0.5 roll-off factor. A residual bit-error-rate which is below the forward-error correction limit is measured. The uplink (81–86 GHz band) transceiver and the downlink (71–76 GHz band) transceiver of the E-band duplex-link provide a 64-QAM transmission which has a 7.5 gigabit-per-second data-rate with a back-to-back configured setup. The 32-QAM and the 16-QAM which provide 6.2 and 5 gigabit-per-second data transmission, respectively are analyzed as well. The paper analyzes the influence of the main analog front-end impairments, noise and amplifier compression, including a real-time capable modem sensitivity over the entire full-duplex E-band communication system performance, i.e. their upper and lower threshold limit for the received power, for different modulation formats and relates these limits to the power compression of the analog frontend's transfer characteristics.
  BibTeX
  @inproceedings{Dilek_EUMC2019, abstract = {In this paper, a performance analysis of a full-duplex E-band link is reported. The transmission system is operated with a real-time capable modem as a digital signal processing unit with broadband mixed-signal blocks. The measurement has been done with a 1.425 gigabaud-per-second data rate transmission for higher order modulations. A raised-cosine pulse-shaping filter is used with a 0.5 roll-off factor. A residual bit-error-rate which is below the forward-error correction limit is measured. The uplink (81–86 GHz band) transceiver and the downlink (71–76 GHz band) transceiver of the E-band duplex-link provide a 64-QAM transmission which has a 7.5 gigabit-per-second data-rate with a back-to-back configured setup. The 32-QAM and the 16-QAM which provide 6.2 and 5 gigabit-per-second data transmission, respectively are analyzed as well. The paper analyzes the influence of the main analog front-end impairments, noise and amplifier compression, including a real-time capable modem sensitivity over the entire full-duplex E-band communication system performance, i.e. their upper and lower threshold limit for the received power, for different modulation formats and relates these limits to the power compression of the analog frontend's transfer characteristics.}, author = {{Dilek}, S. M. and {Schoch}, B. and {Kallfass}, I.}, booktitle = {2019 49th European Microwave Conference (EuMC)}, doi = {10.23919/EuMC.2019.8910936}, month = oct, pages = {976-979}, title = {Performance Analysis of Real-Time Full-Duplex E-band Link}, url = {https://ieeexplore.ieee.org/document/8910936/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8910936/
7. B. Schoch, A. Tessmann, A. Leuther, S. Wagner, und I. Kallfass, „260 GHz Broadband Power Amplifier MMIC“, in 2019 12th German Microwave Conference (GeMiC), 2019, S. 232–235. doi: 10.23919/GEMIC.2019.8698140.
  Zusammenfassung
  This paper presents a broadband H-Band (220-325 GHz) power amplifier in a 35nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a submillimeter-wave monolithic integrated circuit and is designed to drive a high power amplifier in a multi-gigabit communication system or to be implemented in a wideband millimeter-wave radar to detect imperfections in materials. A five-stage amplifier S-MMIC based on common-source gain cells was realized and measured on-wafer with a maximum gain of 14.7dB at 245 GHz. The 3-dB-bandwidth is from 238 to 292 GHz with a gain variation of around 2dB. The amplifier has four parallel transistors in the last two stages and provides up to 4 dBm of output power, under 1dB gain compression. A saturated output power of 6.7 dBm at 280GHz could be measured.
  BibTeX
  @inproceedings{8698140, abstract = {This paper presents a broadband H-Band (220-325 GHz) power amplifier in a 35nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a submillimeter-wave monolithic integrated circuit and is designed to drive a high power amplifier in a multi-gigabit communication system or to be implemented in a wideband millimeter-wave radar to detect imperfections in materials. A five-stage amplifier S-MMIC based on common-source gain cells was realized and measured on-wafer with a maximum gain of 14.7dB at 245 GHz. The 3-dB-bandwidth is from 238 to 292 GHz with a gain variation of around 2dB. The amplifier has four parallel transistors in the last two stages and provides up to 4 dBm of output power, under 1dB gain compression. A saturated output power of 6.7 dBm at 280GHz could be measured.}, author = {{Schoch}, B. and {Tessmann}, A. and {Leuther}, A. and {Wagner}, S. and {Kallfass}, I.}, booktitle = {2019 12th German Microwave Conference (GeMiC)}, doi = {10.23919/GEMIC.2019.8698140}, issn = {2167-8022}, month = {March}, pages = {232-235}, title = {260 GHz Broadband Power Amplifier MMIC}, url = {https://ieeexplore.ieee.org/document/8698140/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8698140/
8. B. Schoch, A. Tessmann, A. Leuther, S. Wagner, und I. Kallfass, „300 GHz broadband power amplifier with 508 GHz gain-bandwidth product and 8 dBm output power“, in 2019 IEEE MTT-S International Microwave Symposium (IMS), 2019, S. 1249–1252. doi: 10.1109/MWSYM.2019.8700754.
  Zusammenfassung
  This paper presents a broadband H-band (220 -325 GHz) power amplifier in a 35 nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a submillimeter-wave monolithic integrated circuit (S-MMIC) and is designed to drive a high power amplifier in a multi-gigabit communication system. The five-stage amplifier S-MMIC based on common-source gain cells was realized and measured on-wafer with a maximum gain of 23 dB at 285 GHz. The lower and higher cutoff frequency is 278 and 335 GHz, respectively, with a gain variation of around 4 dB. The amplifier has four parallel transistors in the last two stages and provides a saturated output power of 8 dBm at 300 GHz. A gain-bandwidth product (GBW) of 508 GHz could be achieved.
  BibTeX
  @inproceedings{8700754, abstract = {This paper presents a broadband H-band (220 -325 GHz) power amplifier in a 35 nm InGaAs-based metamorphic high electron mobility transistor technology. The amplifier is realized as a submillimeter-wave monolithic integrated circuit (S-MMIC) and is designed to drive a high power amplifier in a multi-gigabit communication system. The five-stage amplifier S-MMIC based on common-source gain cells was realized and measured on-wafer with a maximum gain of 23 dB at 285 GHz. The lower and higher cutoff frequency is 278 and 335 GHz, respectively, with a gain variation of around 4 dB. The amplifier has four parallel transistors in the last two stages and provides a saturated output power of 8 dBm at 300 GHz. A gain-bandwidth product (GBW) of 508 GHz could be achieved.}, author = {{Schoch}, B. and {Tessmann}, A. and {Leuther}, A. and {Wagner}, S. and {Kallfass}, I.}, booktitle = {2019 IEEE MTT-S International Microwave Symposium (IMS)}, doi = {10.1109/MWSYM.2019.8700754}, issn = {2576-7216}, month = {June}, pages = {1249-1252}, title = {300 GHz broadband power amplifier with 508 GHz gain-bandwidth product and 8 dBm output power}, url = {https://ieeexplore.ieee.org/document/8700754/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8700754/
2018
1. M. Schmidt, J. Säily, T. Tikka, L. Cupido, M. Rösch, und B. Schoch, „Architecture of a Cubesat based W-band channel measurements system“, 2018.
  - BibTeX
  BibTeX
  @inproceedings{Schmidt_Ka-Band2018, author = {Schmidt, Michael and Säily, Jussi and Tikka, Tuomas and Cupido, Luis and Rösch, Markus and Schoch, Benjamin}, journal = {in 24th Ka and Broadband Communications Conference}, title = {{Architecture of a Cubesat based W-band channel measurements system}}, year = 2018 }
2. I. Kallfass u. a., „Wideband Data Transmission in E-Band Between an Aircraft and a Ground Station“, in Proc. 9th Advanced Satellite Multimedia Systems Conference (ASMS) and 15th Signal Processing for Space Communications Workshop (SPSC), Berlin, 2018.
  - BibTeX
  BibTeX
  @article{Kallfass_ASMS2018, author = {Kallfass, I. and Henneberger, R. and Sommer, R. and Harati, P. and Dilek, S.M. and Schoch, B. and Eisenbeis, J. and Marahrens, S. and Palm, S. and Tessmann, A.}, journal = {in Proc. 9th Advanced Satellite Multimedia Systems Conference (ASMS) and 15th Signal Processing for Space Communications Workshop (SPSC), Berlin}, title = {{Wideband Data Transmission in E-Band Between an Aircraft and a Ground Station}}, year = 2018 }
2017
1. P. Harati u. a., „Is E-Band Satellite Communication Viable?: Advances in Modern Solid-State Technology Open Up the Next Frequency Band for SatCom“, IEEE Microwave Magazine, Bd. 18, Nr. 7, Art. Nr. 7, 2017, doi: 10.1109/MMM.2017.2738898.
  Zusammenfassung
  The Russians launched the first artificial Earth satellite, Sputnik 1, into an elliptical low-Earth orbit (LEO) in October 1957. Through its four external antennas, Sputnik 1 broadcast radio beacons at 20.005 and 40.01 MHz to study the density of the atmosphere and the radio-wave propagation through the ionosphere. This historic event represents the advent of the satellite age. Since then, satellites have become an integral part of global navigation, Earth observation, broadcasting, and communication systems. The latter complements conventional wired and wireless terrestrial communication and provides an effective platform to relay radio signals between two arbitrary points on or near the Earth. Satellite communication offers end users a high level of flexibility. Irrespective of the geological coordinate, the user can benefit from a broad spectrum for various applications, from two-way voice and data communication to video conferencing.
  BibTeX
  @article{harati2017eband, abstract = {The Russians launched the first artificial Earth satellite, Sputnik 1, into an elliptical low-Earth orbit (LEO) in October 1957. Through its four external antennas, Sputnik 1 broadcast radio beacons at 20.005 and 40.01 MHz to study the density of the atmosphere and the radio-wave propagation through the ionosphere. This historic event represents the advent of the satellite age. Since then, satellites have become an integral part of global navigation, Earth observation, broadcasting, and communication systems. The latter complements conventional wired and wireless terrestrial communication and provides an effective platform to relay radio signals between two arbitrary points on or near the Earth. Satellite communication offers end users a high level of flexibility. Irrespective of the geological coordinate, the user can benefit from a broad spectrum for various applications, from two-way voice and data communication to video conferencing.}, author = {{Harati}, P. and {Schoch}, B. and {Tessmann}, A. and {Schwantuschke}, D. and {Henneberger}, R. and {Czekala}, H. and {Zwick}, T. and {Kallfass}, I.}, doi = {10.1109/MMM.2017.2738898}, issn = {1557-9581}, journal = {IEEE Microwave Magazine}, month = nov, number = 7, pages = {64-76}, title = {Is E-Band Satellite Communication Viable?: Advances in Modern Solid-State Technology Open Up the Next Frequency Band for SatCom}, url = {https://ieeexplore.ieee.org/document/8064234/}, volume = 18, year = 2017 }
  Link
  https://ieeexplore.ieee.org/document/8064234/
2. I. Dan, B. Schoch, G. Eren, S. Wagner, A. Leuther, und I. Kallfass, „A 300 GHz MMIC-based quadrature receiver for wireless terahertz communications“, in 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2017, S. 1–2. doi: 10.1109/IRMMW-THz.2017.8066891.
  Zusammenfassung
  A compact receiver MMIC for a 300 GHz wireless communication system has been developed in a 35 nm mHEMT technology. The circuit integrates an active frequency multiplier by three and a buffer amplifier for the LO signal, a single balanced, quadrature, fundamental resistive down-converter and an RF pre-amplifier. The chip measurements have shown that the receiver exhibits a conversion gain of -1 dB and a 3-dB bandwidth of 30 GHz. The DC power consumption of the receiver is 110 mW.
  BibTeX
  @inproceedings{Dan_IRMMW2017, abstract = {A compact receiver MMIC for a 300 GHz wireless communication system has been developed in a 35 nm mHEMT technology. The circuit integrates an active frequency multiplier by three and a buffer amplifier for the LO signal, a single balanced, quadrature, fundamental resistive down-converter and an RF pre-amplifier. The chip measurements have shown that the receiver exhibits a conversion gain of -1 dB and a 3-dB bandwidth of 30 GHz. The DC power consumption of the receiver is 110 mW.}, author = {{Dan}, I. and {Schoch}, B. and {Eren}, G. and {Wagner}, S. and {Leuther}, A. and {Kallfass}, I.}, booktitle = {2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)}, doi = {10.1109/IRMMW-THz.2017.8066891}, issn = {2162-2035}, month = aug, pages = {1-2}, title = {A 300 GHz MMIC-based quadrature receiver for wireless terahertz communications}, url = {https://ieeexplore.ieee.org/document/8066891/}, year = 2017 }
  Link
  https://ieeexplore.ieee.org/document/8066891/

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Benjamin Schoch

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