A multi-band dual-beam ultra-wideband direction finding(DF)antenna is designed,which covers L/S/C/X bands by cutting the parabolic multi-feed sources,can not only save the equipment space,but also achieve a shared paraboloid for multi-band dual-beam.The narrowbeam in the azi-muth is achieved by changing the cutting form of the paraboloid.By using a parabolic antenna with offset feed,the feed source,feed line,support structure,etc.can be moved away from the areas with strong reflection waves,which can reduce the cover on the aperture surface,improve the matching and reduce the sidelobe level.Thus the shared reflection surface for multi-band dual-beam is a-chieved.The test results show that the antenna has good electric performance in the L/S/C/X bands.
multi-band dual-beam direction finding antennaparabolic antennafeed combination
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