A Dual linear polarized, wide bandwidth, C-Band CATF Feed for Radiated mode characterization of Spacecraft payloads

Compact antenna test facility (CATF) is widely used for characterization of antenna parameters and payload parameters in radiated mode. The radiated mode characterization of payload in CATF usually calls for mounting of two different feeds, one for uplink and another to cater downlink frequency. The two feeds will be placed at an offset from focus, as the test range has a single fixed focus. To circumvent this problem, an ultra-wide bandwidth (64 %Bandwidth), 3.6-7 GHz, C-Band CATF feed which covers uplink and downlink in a single feed is designed. In this paper, design details, and measured results are provided.