A Doubly Curved Modulated Frequency Selective Surface Sub-Reflector in a Dual-Band (Tx/Rx) Multiple-Beam Reflector Antenna

A dual-band (Tx/Rx) multiple spot beam reflector system for high throughput satellites in Ka-band is presented. The configuration is a multiple-feed-per-beam dual reflector Cassegrain antenna with a frequency selective surface (FSS) sub-reflector that separates the response between Tx and Rx frequency bands. Using this configuration, a full multiple-beam coverage employing the four-colour frequency/polarisation reuse scheme can be produced using only a single main reflector. By utilising a modulated FSS sub-reflector, the performance of the antenna system is significantly improved compared to using a periodic element distribution on the sub-reflector.

Publication: European Conference on Antennas and Propagation (EuCAP)

Place: Madrid, Spain