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A compact second-order frequency selective surface (FSS) with broadband bandpass response is presented.The FSS is obtained by utilizing two arrays of patches coupled together using coupling apertures. Three-legged load (TLL) patches and TLL complementary coupling apertures are selected and arranged in an interlaced grid to achieve a more compact structure. Such closely packed FSS has the merits of low-profile, high selectivity, smaller periodicities, low insertion losses, stable performance for various incident angles and different polarizations. Moreover, its 3dB bandwidth reaches to 34.1% while the reflectivity in the central passband is about -35dB. Detailed design procedure, and measurement results of the FSS are presented and discussed in this letter. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 54:392-394, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26532 [ABSTRACT FROM AUTHOR]

A dual band frequency selective surface (FSS) based on circular aperture-coupled patches is presented. The technique is based on using two same structures with different sizes. A special topology is proposed to arrange the two different sizes structures. Each structure is composed of two circular patches and a circular coupling aperture. The dual band FSS has a second-order band pass responses at each band of operation and owes its advantages to high selectivity and stable performance for both various incident angles and different polarizations. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26102 [ABSTRACT FROM AUTHOR]

ABSTRACT In this article, a wide impedance bandwidth and gain bandwidth Fabry-Perot resonator microstrip patch antenna based on metamaterials was presented. The metamaterial superstrate, which is constructed by a doubly periodic array of complementary cross elements, achieved stable reflection phase response within the wide desired operation frequency range to broaden the bandwidth. This antenna worked at 13 GHz, and the simulated and measured impedance bandwidth (S11 < −10 dB) was 1.56 and 1.33 GHz, respectively. The simulated 3 dB gain bandwidth was about 1.1 GHz, and the measured results verified the design. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1675-1678, 2016 [ABSTRACT FROM AUTHOR]