A 97-GHz-Band High-Gain 8 × 8 Waveguide Slot Array Antenna

Abstract

A W-band high-gain 8 × 8 waveguide slot array antenna made by using computer numerical controlled machining process is presented in this paper. The antenna is composed of a centrosymmetric array of 64 radiation slots that are distributed in the broad walls of eight parallel rectangular waveguides. Each of the waveguide containing eight radiation slots is fed by a two-way waveguide power divider through another one coupling slot. RF design, fabrication, and measurement of the antenna have been discussed. The manufactured antenna demonstrates at 95.1–98 GHz desired radiation performance with a reflection coefficient of lower than -10 dB and in-band realized gains of 16.8–18.1 dBi.