| 摘要 |
<p>MULTIBEAM ANTENNA WITH REDUCED SIDELOBES The present invention relates to a multibeam antenna feed arrangement comprising a plurality of feeds, each feed being capable of receiving a different input signal and including a separate waveguide means connected between the feed and an associated local transmitter or receiver. The feed arrangement further comprises crosscoupling paths disposed between predetermined pairs of the waveguide means for (a) coupling out a portion of the signal propagating in a waveguide means associated with a first one of the feeds, (b) adjusting the amplitude and phase of the coupled-out signal in a predetermined manner, and (c) introducing the resultant adjusted signal into the waveguide means associated with a second one of the feeds where the sidelobe of the second one of the feeds exceeds a predetermined sidelobe level in the direction served by the first one of the feeds thereby reducing signal interference in the second one of the feeds. For N feeds, where N is an even number, only N cross-coupling paths may be needed. Where N is an odd number, only N-1 crosscoupling paths may be needed.</p> |
