Single Layer Circular Polarized Antenna Array Based on Gap Waveguide Technology for Automotive Radar Applications

This paper presents a single layer circularly polarized (CP) antenna array based on gap waveguide (GW) technology for automotive radar applications. The antenna element is a curved slot that is cut into the top wall of a groove gap waveguide (GGW) structure. An ۸×۸ slot array antenna is constructed by combining eight sub-arrays of linearly arranged slots, using an ۸-way power divider as the feeding network. The power divider and the transition from WR۱۲ to GGW are also designed based on GW technology. The proposed antenna array operates in the frequency band from ۷۶ GHz to ۸۱ GHz, covering the automotive radar working bandwidth. The antenna has a maximum gain of ۲۳.۸ dBi and a minimum axial ratio of ۰.۵ dB. The antenna performance is verified by simulation using CST Microwave Studio.

کلیدواژه ها:

Automotive radar applications ، Gap waveguide technology ، CP array antenna ، Slot array antenna