Gain Enhancement of 60-GHz SIW Cavity-Backed Slot Array Antenna with Metallic Grooves

Abstract

In this paper, a 60-GHz substrate integrated waveguide (SIW) cavity-backed slot array antenna with metallic grooves is proposed. To feed the four slot antenna elements, SIW feed structure with microstrip to SIW transition is used. To account for the effect of an actual connector on the antenna performance, the simulation including the V-band connector model was carried out. The connector model was based on the datasheet from Southwest Microwave. The simulated 10-dB return loss bandwidth of the proposed antenna with connector is 440 MHz (59.85 – 60.29 GHz). To obtain high gian characteristic, 16 metallic grooves are used. By adding the grooves, the electric field is concentrated in +z direction. The broadside gains of the antenna with and without 16 grooves are 15.02 dBi and 4.87 dBi, respectively.