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The eleven antenna: a compact low-profile decade bandwidth dual polarized feed for reflector antennas

机译:十一天线:紧凑的低调十倍带宽双极化馈源,用于反射器天线

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摘要

A novel dual polarized ultrawide-band (UWB) feed with a decade bandwidth is presented for use in both single and dual reflector antennas. The feed has nearly constant beam width and 11 dBi directivity over at least a decade bandwidth. The feed gives an aperture efficiency of the reflector of 66% or better over a decade bandwidth when the subtended angle toward the sub or main reflector is about 53/spl deg/, and an overall efficiency better than 47% including mismatch. The return loss is better than 5 dB over a decade bandwidth. The calculated results have been verified with measurements on a linearly polarized lab model. The feed has no balun as it is intended to be integrated with an active 180/spl deg/ balun and receiver. The feed is referred to as the Eleven antenna because its basic configuration is two parallel dipoles 0.5 wavelengths apart and because it can be used over more than a decade bandwidth with 11 dBi directivity. We also believe that 11 dB return loss is achievable in the near future.
机译:提出了一种新颖的具有十倍带宽的双极化超宽带(UWB)馈电,可用于单反射器天线和双反射器天线。馈源在至少十年的带宽内具有几乎恒定的波束宽度和11 dBi方向性。当朝向副反射器或主反射器的对角大约为53 / spl deg /时,在十倍频带宽上,馈送给反射器的孔径效率达到66%或更高,包括失配在内,总效率优于47%。在十倍频带宽上,回波损耗优于5 dB。计算结果已通过线性极化实验室模型的测量结果验证。进料没有巴伦,因为它打算与有源180 / spl deg /巴伦和接收器集成在一起。该馈电之所以被称为“十一天线”,是因为其基本配置是两个平行的偶极子,相距0.5个波长,并且因为它可以在11 dBi方向性的十多个带宽上使用。我们还认为,在不久的将来可以实现11 dB的回波损耗。

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