Multi-beam antenna to compensate rain attenuation for satellite broadcasting at 21GHz

Abstract

In order to realize the satellite broadcasting at 21GHz, it is essential to overcome rain attenuation at down-links. A solution is the use of a multi-beam transmitting antenna on board, of which beams are feeded variably; more power to beams pointing to heavily raining areas. This paper describes a parabolic antenna with 6 beams and analyzes its interbeam-interference.