A Dual-Linear Polarized Wideband Waveguide-Based Antenna Block

This paper presents a novel dual-linear polarized wideband waveguide-based antenna block for Ku-band application. The designed antenna is composed of a square-radiator and a two-port feed network. The radiating element can be seen as a wide-slot-fed cavity-backed radiator; which is split into four smaller apertures by a set of cross thin-wall. Moreover, the feed network is divided into horizontal-polarized feeding part and vertical-polarized feeding part. Simulated results show that the dual-linear polarized antenna achieves an operating bandwidth from 12.36 GHz to 14.70 GHz in the horizontal polarization, and from 12.30 GHz to 14.1 GHz in the vertical polarization with a high isolation better than 44 dB. Besides, the simulated gain of the antenna is about 14 dBi and cross polarizations are better than -25 dB.