79 GHz Active Array FMCW Radar System on Low-Cost FR-4 Substrates

This work, for the first time to our best knowledge, presents a W-band multi-channel frequency-modulated continuous-wave (FMCW) radar system on low-cost FR-4 substrates. A center-fed patch array antenna on an FR-4 substrate can achieve a maximum gain of 10.8 dBi. It is enabled by aperture coupled feeding using an on-chip feeder implemented on a CMOS radar transmitter (Tx) and receiver (Rx). The proposed radar system consists of one Tx and four Rx channels placed in the back cavity of a microstrip array antenna like an active array antenna system. Additionally, Tx and Rx chipsets include a wideband frequency multiplier with high multiplication ratio of 63, making it easy to distribute reference FMCW waveform synthesized at a very low frequency about 1.25 GHz for 79 GHz output using direct digital synthesis (DDS). Extending the number of channels and implementing various waveforms can be easily accomplished with very good phase noise. The functionality of the proposed radar system on low-cost substrates is confirmed by distance and angle measurements.

[1]  Brian P. Ginsburg,et al.  A multimode 76-to-81GHz automotive radar transceiver with autonomous monitoring , 2018, 2018 IEEE International Solid - State Circuits Conference - (ISSCC).

[2]  Tzu-Chao Yan,et al.  A K-Band CMOS Quadrature Frequency Tripler Using Sub-Harmonic Mixer , 2009, IEEE Microwave and Wireless Components Letters.

[3]  Wooram Lee,et al.  Reconfigurable 60-GHz Radar Transmitter SoC with Broadband Frequency Tripler in 45nm SOI CMOS , 2019, 2019 IEEE Radio Frequency Integrated Circuits Symposium (RFIC).

[4]  Reinhard Feger,et al.  A Frequency-Division MIMO FMCW Radar System Based on Delta–Sigma Modulated Transmitters , 2014, IEEE Transactions on Microwave Theory and Techniques.

[5]  Yahia M. M. Antar,et al.  Active millimetre-wave aperture-coupled microstrip patch antenna array , 1995 .

[6]  Harry L. Van Trees,et al.  Optimum Array Processing , 2002 .

[8]  Vito Giannini,et al.  9.2 A 192-Virtual-Receiver 77/79GHz GMSK Code-Domain MIMO Radar System-on-Chip , 2019, 2019 IEEE International Solid- State Circuits Conference - (ISSCC).

[9]  Mikko Varonen,et al.  Scalable 60 GHz FMCW Frequency-Division Multiplexing MIMO Radar , 2020, IEEE Transactions on Microwave Theory and Techniques.

[10]  S. Gruszczynski,et al.  Microstrip antenna array with series-fed 'through-element' coupled patches , 2007 .

[11]  Wei Deng,et al.  A CMOS 76–81-GHz 2-TX 3-RX FMCW Radar Transceiver Based on Mixed-Mode PLL Chirp Generator , 2020, IEEE Journal of Solid-State Circuits.

[12]  T. Chu,et al.  An Nth-harmonic oscillator using an N-push coupled oscillator array with voltage-clamping circuits , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[13]  Sangwook Nam,et al.  A 77-GHz FMCW Radar System Using On-Chip Waveguide Feeders in 65-nm CMOS , 2015, IEEE Transactions on Microwave Theory and Techniques.

[14]  Bao-hua Sun,et al.  A Low-Cost, Single-Layer, Dual Circularly Polarized Antenna for Millimeter-Wave Applications , 2019, IEEE Antennas and Wireless Propagation Letters.

[15]  Wonbin Hong,et al.  Multilayer Antenna Package for IEEE 802.11ad Employing Ultralow-Cost FR4 , 2012, IEEE Transactions on Antennas and Propagation.

[16]  M. Skolnik,et al.  Introduction to Radar Systems , 2021, Advances in Adaptive Radar Detection and Range Estimation.

[17]  Andreas Stelzer,et al.  77 GHz center-fed differential microstrip antenna array , 2011, Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP).

[18]  Kaixue Ma,et al.  A 65 nm CMOS Power Amplifier With Peak PAE above 18.9% From 57 to 66 GHz Using Synthesized Transformer-Based Matching Network , 2015, IEEE Transactions on Circuits and Systems I: Regular Papers.

[19]  Byung-Sung Kim,et al.  A Compact Integration of a 77 GHz FMCW Radar System Using CMOS Transmitter and Receiver Adopting On-Chip Monopole Feeder , 2019, IEEE Access.

[20]  Munkyo Seo,et al.  A W-Band Signal Generation Using N-Push Frequency Multipliers for Low Phase Noise , 2014, IEEE Microwave and Wireless Components Letters.