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GSM filtering of horn antennas using modified double square frequency selective surface

机译：使用改进的双平方频率选择性表面对号角天线进行GSM滤波

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In this work, a dual-band frequency selective surface (FSS) is proposed to be placedrnperpendicularly into the apertures of horn antennas for prefiltering 900 and 1800rnMHz GSM signals interfering during the signal reception, with the enhanced returnrnloss, gain, and directivity at the desired frequencies. For this purpose, the microstriprndouble square loop MDSL is modified in the first stage. As for the second stage, anrnFSS array (2×2) is built up arranging the unit MDSLs in a periodic structure andrnfinally these FSS unit arrays are fixed perpendicularly covering the aperture of arnridged horn antenna which is a part of the available radar system operating betweenrn0.5 and 3 GHz in our laboratory, to construct an integrated module having both bandstoprnprefilter and horn antenna called “filtenna.” The simulated and experimentalrnresults are agreed that the proposed FSS structure attenuates GSM signals at the 900rnand 1800 MHz through the high reflection and very poor transmission mechanismsrnmeanwhile enhances return loss characteristics, radiation pattern, and gain of thernhorn antenna in the desired band. Thus, it can be concluded that these simple microstriprnFSS structure can be effectively adapted to the horn antennas which need thernGSM prefiltering.
机译：在这项工作中，建议将双频频率选择表面（FSS）垂直放置在号角天线的孔中，以对信号接收过程中干扰的900和1800rnMHz GSM信号进行预滤波，并在所需的位置提高回波损耗，增益和方向性。频率。为此，在第一阶段修改了微带双平方环MDSL。对于第二阶段，建立了nFSS阵列（2×2），将MDSL单元布置为周期性结构，最后将这些FSS单元阵列垂直固定，覆盖了有角喇叭天线的孔径，这是在rn0之间运行的可用雷达系统的一部分。 .5和3 GHz，在我们的实验室中，以构建一个集成的模块，该模块同时具有带阻预滤波器和称为“ filtenna”的号角天线。仿真和实验结果表明，所提出的FSS结构通过高反射和非常差的传输机制来衰减900rn和1800 MHz处的GSM信号，同时提高了回波损耗特性，辐射方向图和所需喇叭天线的增益。因此，可以得出结论，这些简单的微带FSS结构可以有效地适应需要GSM预滤波的号角天线。

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