A Polarization Switchable Ultra-Wideband Horn Antenna with Feeding Network

Abstract

A polarization switchable ultra-wideband horn antenna with feeding network is designed and implemented. A single antenna can realize four switchable polarization modes (vertical polarization, horizontal polarization, left-hand circular polarization, and right-hand circular polarization) with ultra-wideband characteristics in the microwave and millimeter wave frequency band by an electronically controlled mechanical switch. TTL (Transistor-Transistor Logic) level is adopted as controlled electrical signal. The antenna can significantly improve test efficiency by avoiding manual switching of the antenna polarization mode. The presented antenna has a super wide bandwidth of 9.3GHz, worked well from 0.7GHz to 10GHz. Measured results for VSWR, radiation pattern, and gain of the designed horn antenna are provided.