TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar
Monostatic radar shares a single antenna between the transmitter (TX) and receiver (RX) and offers an advantage of the reduced sensor size. However, due to the limited isolation of the coupler, the TX signal leaking into the RX significantly degrades the performance of the monostatic doppler radar....
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| Format: | Article |
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IEEE
2025-01-01
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| Series: | IEEE Journal of Microwaves |
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| Online Access: | https://ieeexplore.ieee.org/document/10841826/ |
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| author | Ahmad Mushtaq Thomas Mausolf Wolfgang Miesch Nasir Uddin Wolfgang Winkler Dietmar Kissinger |
| author_facet | Ahmad Mushtaq Thomas Mausolf Wolfgang Miesch Nasir Uddin Wolfgang Winkler Dietmar Kissinger |
| author_sort | Ahmad Mushtaq |
| collection | DOAJ |
| description | Monostatic radar shares a single antenna between the transmitter (TX) and receiver (RX) and offers an advantage of the reduced sensor size. However, due to the limited isolation of the coupler, the TX signal leaking into the RX significantly degrades the performance of the monostatic doppler radar. This paper presents the design of an ultra-compact impedance tuner (IT) which is connected to the lumped Rat-Race coupler to minimize the TX to RX leakage signal. The IT offers 5-bit phase control and 8-bit magnitude control via the Serial Peripheral Interface (SPI); moreover, it uses SiGe transistors in reverse saturation to enhance the impedance tuning performance. The size of the IT is only 0.04 mm<sup>2</sup> and its power consumption is 4 mW at 3.3V power supply. A two-channel 60 GHz monostatic doppler phased array radar chip has been designed and fabricated in 130 nm SiGe BiCMOS technology for vital signs monitoring application. The measured TX to RX isolation due to the Rat-Race coupler is 22 dB; moreover, IT provides the additional isolation of 27 dB, giving total TX to RX isolation of 49 dB at 60 GHz. The design, simulation and measurements of the IT and its measured leakage cancellation performance is reported in this paper. |
| format | Article |
| id | doaj-art-aa50ab7e6d4742af9b893c36eb54eb8a |
| institution | Kabale University |
| issn | 2692-8388 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Microwaves |
| spelling | doaj-art-aa50ab7e6d4742af9b893c36eb54eb8a2025-01-15T00:04:06ZengIEEEIEEE Journal of Microwaves2692-83882025-01-0151849510.1109/JMW.2024.351647610841826TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler RadarAhmad Mushtaq0https://orcid.org/0000-0001-9486-1589Thomas Mausolf1Wolfgang Miesch2Nasir Uddin3Wolfgang Winkler4Dietmar Kissinger5https://orcid.org/0000-0002-9698-4432Indie Semiconductor, Frankfurt, GermanyIHP, Circuit Design Department, Frankfurt, GermanyIndie Semiconductor, Frankfurt, GermanyIndie Semiconductor, Frankfurt, GermanyIndie Semiconductor, Frankfurt, GermanyInstitute of Electronic Devices and Circuits, Ulm University, Ulm, GermanyMonostatic radar shares a single antenna between the transmitter (TX) and receiver (RX) and offers an advantage of the reduced sensor size. However, due to the limited isolation of the coupler, the TX signal leaking into the RX significantly degrades the performance of the monostatic doppler radar. This paper presents the design of an ultra-compact impedance tuner (IT) which is connected to the lumped Rat-Race coupler to minimize the TX to RX leakage signal. The IT offers 5-bit phase control and 8-bit magnitude control via the Serial Peripheral Interface (SPI); moreover, it uses SiGe transistors in reverse saturation to enhance the impedance tuning performance. The size of the IT is only 0.04 mm<sup>2</sup> and its power consumption is 4 mW at 3.3V power supply. A two-channel 60 GHz monostatic doppler phased array radar chip has been designed and fabricated in 130 nm SiGe BiCMOS technology for vital signs monitoring application. The measured TX to RX isolation due to the Rat-Race coupler is 22 dB; moreover, IT provides the additional isolation of 27 dB, giving total TX to RX isolation of 49 dB at 60 GHz. The design, simulation and measurements of the IT and its measured leakage cancellation performance is reported in this paper.https://ieeexplore.ieee.org/document/10841826/Doppler radarflicker noiseimpedance tunerleakage cancellationmonostatic radarphased array radar |
| spellingShingle | Ahmad Mushtaq Thomas Mausolf Wolfgang Miesch Nasir Uddin Wolfgang Winkler Dietmar Kissinger TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar IEEE Journal of Microwaves Doppler radar flicker noise impedance tuner leakage cancellation monostatic radar phased array radar |
| title | TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar |
| title_full | TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar |
| title_fullStr | TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar |
| title_full_unstemmed | TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar |
| title_short | TX to RX Compact Leakage Cancellation Impedance Tuner for 60 GHz Monostatic Doppler Radar |
| title_sort | tx to rx compact leakage cancellation impedance tuner for 60 ghz monostatic doppler radar |
| topic | Doppler radar flicker noise impedance tuner leakage cancellation monostatic radar phased array radar |
| url | https://ieeexplore.ieee.org/document/10841826/ |
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