A Novel Wideband Feed Configuration for Compact Range to Improve the Low Frequency Performance

The wideband feed is significant for the quiet zone (QZ) performance of compact range. This paper discussed the negative effect caused by the side-lobe of the feed, especially in the lower frequency range. To reduce the mutual coupling between transmitting and receiving feed, an impedance-wall is designed to keep QZ pureness and steady. The feed configuration and effect of the impedance-wall are simulated and shown.