An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology

Matthias Porranzl; Christoph Wagner; Herbert Jäger; Andreas Stelzer

doi:10.1109/ICMIM.2015.7117933

An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology

Matthias Porranzl
, Christoph Wagner
, Herbert Jäger
, Andreas Stelzer

Department of RF-Systems

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

An active quasi-circulator (QC) for transmit (TX) and receive (RX) signal separation in monostatic FMCW 77-GHz radar transceivers is presented with special emphasis on linear behavior in the TX-path. To increase the compression point in the TX-path, the conventional structure of an active QC circuit is modified. A transformer is used to transfer the transmit power to the antenna, which performs DC decoupling at the antenna port at the same time. The circuit is implemented in a 200-GHz fT Silicon-Germanium (SiGe) HBT technology and measured onwafer. Since there is no active device in the TX-path, there is no compression of the transmitted signal, which has been verified up to 10dBm input power. The TX/RX isolation is maintained independent of the transmit power. The measured return loss at 77 GHz is below 10 dB at each port, whereas the transmission parameter for the TX signal and RX signal are -7.2 dB and 2.7 dB, respectively. The TX/RX isolation is about 23 dB over a bandwidth of 8 GHz.

Original language	English
Title of host publication	Microwaves for Intelligent Mobility (ICMIM), 2015 IEEE MTT-S International Conference on
Pages	1-4
Number of pages	4
ISBN (Electronic)	9781479972159
DOIs	https://doi.org/10.1109/ICMIM.2015.7117933
Publication status	Published - 03 Jun 2015

Fields of science

202019 High frequency engineering
202029 Microwave engineering
202033 Radar technology
202 Electrical Engineering, Electronics, Information Engineering

JKU Focus areas

Mechatronics and Information Processing

Access to Document

10.1109/ICMIM.2015.7117933

Cite this

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title = "An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology",

abstract = "An active quasi-circulator (QC) for transmit (TX) and receive (RX) signal separation in monostatic FMCW 77-GHz radar transceivers is presented with special emphasis on linear behavior in the TX-path. To increase the compression point in the TX-path, the conventional structure of an active QC circuit is modified. A transformer is used to transfer the transmit power to the antenna, which performs DC decoupling at the antenna port at the same time. The circuit is implemented in a 200-GHz fT Silicon-Germanium (SiGe) HBT technology and measured onwafer. Since there is no active device in the TX-path, there is no compression of the transmitted signal, which has been verified up to 10dBm input power. The TX/RX isolation is maintained independent of the transmit power. The measured return loss at 77 GHz is below 10 dB at each port, whereas the transmission parameter for the TX signal and RX signal are -7.2 dB and 2.7 dB, respectively. The TX/RX isolation is about 23 dB over a bandwidth of 8 GHz.",

author = "Matthias Porranzl and Christoph Wagner and Herbert J{\"a}ger and Andreas Stelzer",

year = "2015",

month = jun,

day = "3",

doi = "10.1109/ICMIM.2015.7117933",

language = "English",

pages = "1--4",

booktitle = "Microwaves for Intelligent Mobility (ICMIM), 2015 IEEE MTT-S International Conference on",

}

An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology. / Porranzl, Matthias; Wagner, Christoph; Jäger, Herbert et al.
Microwaves for Intelligent Mobility (ICMIM), 2015 IEEE MTT-S International Conference on. 2015. p. 1-4 7117933.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

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T1 - An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology

AU - Porranzl, Matthias

AU - Wagner, Christoph

AU - Jäger, Herbert

AU - Stelzer, Andreas

PY - 2015/6/3

Y1 - 2015/6/3

N2 - An active quasi-circulator (QC) for transmit (TX) and receive (RX) signal separation in monostatic FMCW 77-GHz radar transceivers is presented with special emphasis on linear behavior in the TX-path. To increase the compression point in the TX-path, the conventional structure of an active QC circuit is modified. A transformer is used to transfer the transmit power to the antenna, which performs DC decoupling at the antenna port at the same time. The circuit is implemented in a 200-GHz fT Silicon-Germanium (SiGe) HBT technology and measured onwafer. Since there is no active device in the TX-path, there is no compression of the transmitted signal, which has been verified up to 10dBm input power. The TX/RX isolation is maintained independent of the transmit power. The measured return loss at 77 GHz is below 10 dB at each port, whereas the transmission parameter for the TX signal and RX signal are -7.2 dB and 2.7 dB, respectively. The TX/RX isolation is about 23 dB over a bandwidth of 8 GHz.

AB - An active quasi-circulator (QC) for transmit (TX) and receive (RX) signal separation in monostatic FMCW 77-GHz radar transceivers is presented with special emphasis on linear behavior in the TX-path. To increase the compression point in the TX-path, the conventional structure of an active QC circuit is modified. A transformer is used to transfer the transmit power to the antenna, which performs DC decoupling at the antenna port at the same time. The circuit is implemented in a 200-GHz fT Silicon-Germanium (SiGe) HBT technology and measured onwafer. Since there is no active device in the TX-path, there is no compression of the transmitted signal, which has been verified up to 10dBm input power. The TX/RX isolation is maintained independent of the transmit power. The measured return loss at 77 GHz is below 10 dB at each port, whereas the transmission parameter for the TX signal and RX signal are -7.2 dB and 2.7 dB, respectively. The TX/RX isolation is about 23 dB over a bandwidth of 8 GHz.

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DO - 10.1109/ICMIM.2015.7117933

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BT - Microwaves for Intelligent Mobility (ICMIM), 2015 IEEE MTT-S International Conference on

ER -

An active quasi-circulator with a passive linear TX-path for 77-GHz automotive FMCW radar systems in SiGe technology

Abstract

Fields of science

JKU Focus areas

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