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Total efficiency enhancement of X-band compact choke horn antenna with circular polarization and isoflux pattern

机译:具有圆极化和等通图案的X波段紧凑型扼流喇叭天线的总效率增强

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摘要

This paper presents a solution to reduce the feed complexity and to improve the total efficiency of X-band compact choke horn antenna with circular polarization and isoflux pattern. This kind of antenna had been designed before by our laboratory for nanosatellite applications, but it required a 4-way divider with phase shifter which generates the insertion losses and therefore a lower realized gain (RG). Among several feeds, a uniform circular helix antenna has been used here, which produces a satisfying feed without too much damage for the axial ratio (AR) and the isoflux pattern over a 400 MHz radiation bandwidth (8.0-8.4 GHz). Theoretical and experimental results show an AR lower than 5 dB and a RG higher than 0 dB at the limit of coverage, i.e. 65 degrees whatever the azimuth angle (phi).
机译:本文提出了一种解决方案,以降低馈电复杂度,并提高具有圆极化和等通量方向图的X波段紧凑型扼流喇叭天线的总效率。这种天线以前是由我们的实验室为纳米卫星应用设计的,但是它需要带有移相器的4路分频器,该分频器会产生插入损耗,因此会降低实际增益(RG)。在几种馈源中,这里使用了均匀的圆形螺旋天线,该馈源产生令人满意的馈源,并且在400 MHz辐射带宽(8.0-8.4 GHz)上对轴向比(AR)和等通量方向图没有太大损害。理论和实验结果表明,在覆盖范围的极限,即无论方位角(phi)为65度,AR均低于5 dB,RG高于0 dB。

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