Abstract
Wideband slot antenna gain enhancement using concentric square and circular loop metasurface reflector (SCLMR) is presented in this paper. In two steps, the design is realized. The analysis design of a FSS-based SCLMR unit cell is included in the first step. The SCLMR structure is made up of resonant metallic square-loop and inner circular loop structures. In terms of bandwidth, the unit cell structure can be considered as a stop-band filter (2.5 GHz-6.5 GHz). The design of a wideband slot antenna (29 mm × 24 mm × 1.57 mm) is included in the second step. EM simulation tool is used to analyze, design, optimize, and validate the proposed unit cell and slot antenna combination. CST microwave studio is utilized to design and analyze a slot antenna and a unit cell in this study. The computed result of an antenna with SCLMR indicates a 101.21 % operational impedance bandwidth (2.76 GHz to 8.41 GHz). With SCLMR, the antenna has a high gain of 8.75 dBi. The designed antenna structure provides a gain enhancement of 5.50 dBi while in comparison to the same antenna without SCLMR.
Published Version
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