Control of Radiation Direction in an Aperture Array excited by a Waveguide 2-plane Hybrid Coupler

Abstract

The authors design a plate that controls the beam direction in an aperture array excited by a waveguide 2-plane hybrid coupler. The beam direction can be controlled in a range of ±18-38 deg. in the quasi H-plane, and ±27-54 deg. in the quasi E-plane at the design frequency of 66 GHz. Inductive irises are introduced into tapered waveguides in the plate and suppressed the reflection due to the narrow apertures.