Multilayer cavity backed antenna with backside radiation suppression for 79-GHz applications

In this paper, a new single element wideband cavity backed multi-layer microstrip patch antenna is presented. For this antenna, rectangular patch and circular cavity has been used. This antenna is designed for 79 GHz short range radar applications, and is fabricated with advanced high resolution “Any-Layer” PCB technology. It has a wide bandwidth of 12.44 GHz, which is 15.6% of the center frequency. The beam widths in both E and H-planes are very wide, and are 140 degrees and 78 degrees respectively. In addition, the antenna has a relative gain and efficiency of 5.11 dB and 89.2% respectively. Furthermore, measurements have been done, and show a good agreement with simulations.

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