Design of Substrate-Integrated-Waveguide Antenna for Automotive Short Range Radar Application

The proposed antenna operates at mm-Wave frequency, 77 - 81GHz frequency band which supports the Short-Range Radar (SRR). The design consists of a substrate sandwiched between two PEC layers. The substrate material used is silicon with a thickness of 0.2mm. The radiating element patch has a single complementary circular split ring resonator (CSRR) at its center and the feedline is slightly shifted from the center of patch for a better impedance matching. The SIW plated-through-holes (PTH) which is rectangular, is introduced on three edges of the square patch to suppress the surface waves. The simulated results obtain a s11 below -10dB at 78GHz and gain of above 5dB.