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

Abstract

In this work, a dual‐band frequency selective surface (FSS) is proposed to be placed perpendicularly into the apertures of horn antennas for prefiltering 900 and 1800 MHz GSM signals interfering during the signal reception, with the enhanced return loss, gain, and directivity at the desired frequencies. For this purpose, the microstrip double square loop MDSL is modified in the first stage. As for the second stage, an FSS array (2 × 2) is built up arranging the unit MDSLs in a periodic structure and finally these FSS unit arrays are fixed perpendicularly covering the aperture of a ridged horn antenna which is a part of the available radar system operating between 0.5 and 3 GHz in our laboratory, to construct an integrated module having both bandstop prefilter and horn antenna called “filtenna.” The simulated and experimental results are agreed that the proposed FSS structure attenuates GSM signals at the 900 and 1800 MHz through the high reflection and very poor transmission mechanisms meanwhile enhances return loss characteristics, radiation pattern, and gain of the horn antenna in the desired band. Thus, it can be concluded that these simple microstrip FSS structure can be effectively adapted to the horn antennas which need the GSM prefiltering.

Design and realization of novel frequency selective surface loaded dielectric resonator antenna via 3D printing technology

“…FSSs have been investigated and developed for almost half a century. Thanks to their low profile, low loss, and ability to manipulate electromagnetic fields, they have been extensively used in many microwave applications such as, design of filtenna stages, gain enhancement of antenna stages …”

“…[26][27][28] FSSs have been investigated and developed for almost half a century. Thanks to their low profile, low loss, and ability to manipulate electromagnetic fields, they have been extensively used in many microwave applications such as, design of filtenna stages, 29,30 gain enhancement of antenna stages. 31,32 In this work, it is aimed to propose a high performance, easy to prototype and low cost antenna design which is in the combined form of both DRA and FSS designs for ISM band applications.…”

Performance enhancement of a microstrip patch antenna using dual‐layer frequency‐selective surface for ISM band applications

“…This is because it is compact and easier to integrate to designs. It is increasingly being used to realize planar circuits and antennas …”

“…It is increasingly being used to realize planar circuits and antennas. [1][2][3][4][5][6][7][8][9][10][11][12][13] This study puts forward the improvement that has come about in the gain and beamwidth of a microstrip patch antenna at 2.4GHz ISM band by employing DLFSS. Separate design optimizations and realizations of the microstrip…”

Açısal Olarak Değiştirilebilir Dikdörtgen Yamalı Frekans Seçici Yüzeylerle, Ayarlanabilir Bant Geçiren Filtre Tasarımı

“…Frekans seçici yüzeyler (FSY), yapılarına bağlı olarak bazı frekanslardaki elektromanyetik dalgaları geçirirken bazı frekanslardakini de durdurabilirler [3,4]. Frekans seçici yüzeyler; elektromanyetik dalgaların bozucu etkilerinden korunmak, GSM vb.…”