Design of a wideband feed for the Tianlai project proceedings of the XXXIst URSI general assembly and scientific symposium to be held in Beijing, China (CIE), August 17–23, 2014

摘要

This paper describes the design of a wideband feed for on-axis parabolic cylinder antenna. This assembly, comprising four 4-square elements and reflective cavity, supports dual polarization. The feed is fed by a standard quarter wave balun which can provide a DC short. The current design is intended to work with the on-axis parabolic cylinder antenna from 700MHz to 1200MHz. The simulated results show that the VSWR from 700MHz to 1200MHz, stays below 2.3:1. A prototype of the proposed feed is built to validate the design experimentally, and a bandwidth of 700MHz-1200MHz is achieved.