$F$ -Band Differential Microstrip Patch Antenna Array and Waveguide to Differential Microstrip Line Transition for FMCW Radar Sensor

This paper describes a differential microstrip patch antenna array and a rectangular waveguide to coupled differential microstrip line transition operating at 122 GHz. The antenna array is realized in series-fed topology/architecture and is very suitable for MIMO radar applications. This on-board antenna provides a high antenna gain and radiation efficiency at millimeter-wave frequencies. The rectangular waveguide transition with low insertion loss offers the facilities to characterize the on-board antenna and can also be utilized in a radar system in combination with a horn antenna. The measured bandwidth of the antenna array is 7 GHz with a maximum gain of 12.98 dBi at 122 GHz. The waveguide transition has a bandwidth of 20 GHz at 10-dB return loss. Radar measurements were performed using radar sensors that were equipped with the developed antenna array as well as the waveguide transition in combination with horn antenna for comparison purposes. The radar measurement results with on-board antenna array show a good performance for detecting the range of the target.

[1]  Thomas Zwick,et al.  Low-cost antenna-in-package solution for 122 GHz radar module , 2016, 2016 11th European Microwave Integrated Circuits Conference (EuMIC).

[2]  Linus Maurer,et al.  A 77-GHz antenna in package , 2011, 2011 8th European Radar Conference.

[3]  A. Stelzer,et al.  A Vertical Transition Between Rectangular Waveguide and Coupled Microstrip Lines , 2012, IEEE Microwave and Wireless Components Letters.

[4]  D. I. Stones,et al.  A novel waveguide-to-microstrip transition for millimeter-wave module applications , 1999 .

[5]  C. Rusch,et al.  A 122 GHz Microstrip Slot Antenna with via-fence resonator in LTCC technology , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[6]  N. S. Barker,et al.  A Waveguide to Unenclosed Coplanar Waveguide Transition , 2010, IEEE Transactions on Microwave Theory and Techniques.

[7]  T. Zwick,et al.  Coplanar 122-GHz Antenna Array With Air Cavity Reflector for Integration in Plastic Packages , 2012, IEEE Antennas and Wireless Propagation Letters.

[8]  Christoph Scheytt,et al.  122 GHz patch antenna designs by using BCB above SiGe BiCMOS wafer process for system-on-chip applications , 2013, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).

[9]  N. Kikuma,et al.  Broadband and planar microstrip-to-waveguide transitions in millimeter-wave band , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[11]  Thomas Zwick,et al.  Via-fence antennas on LTCC for radar applications at 122 GHz , 2013, 2013 European Microwave Conference.

[12]  Dietmar Kissinger,et al.  Design and characterization of a differential microstrip patch antenna array at 122 GHz , 2018, 2018 IEEE Radio and Wireless Symposium (RWS).

[14]  Dietmar Kissinger,et al.  Scalable sensor platform with multi-purpose fully-differential 61 and 122 GHz transceivers for MIMO radar applications , 2016, 2016 IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM).

[15]  A. Stelzer,et al.  A 77-GHz FMCW MIMO Radar Based on an SiGe Single-Chip Transceiver , 2009, IEEE Transactions on Microwave Theory and Techniques.

[16]  Dietmar Kissinger,et al.  Miniaturized 122 GHz system-on-chip radar sensor with on-chip antennas utilizing a novel antenna design approach , 2016, 2016 IEEE MTT-S International Microwave Symposium (IMS).

[17]  Yue Cao,et al.  24 GHz Horizontally Polarized Automotive Antenna Arrays With Wide Fan Beam and High Gain , 2019, IEEE Transactions on Antennas and Propagation.

[18]  D. Kissinger,et al.  Highly Miniaturized 120-GHz SIMO and MIMO Radar Sensor With On-Chip Folded Dipole Antennas for Range and Angular Measurements , 2018, IEEE Transactions on Microwave Theory and Techniques.

[19]  J. Schoebel,et al.  Planar Antenna Array at D-Band Fed By Rectangular Waveguide for Future Automotive Radar Systems , 2008, 2008 38th European Microwave Conference.

[20]  A. Stelzer,et al.  A Novel Differential Microstrip Patch Antenna and Array at 79 GHz # , 2008 .

[21]  Thomas Zwick,et al.  Integrated 122-GHz Antenna on a Flexible Polyimide Substrate With Flip Chip Interconnect , 2013, IEEE Transactions on Antennas and Propagation.

[22]  A fully micromachined W-band waveguide-to-grounded coplanar waveguide transition for 91–113 GHz applications , 2010, The 40th European Microwave Conference.

[23]  E. M. Hartwell.  Boston , 1906 .

[24]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .