High gain and wideband circularly polarized S‐shaped patch antenna with reactive impedance surface and frequency‐selective surface configuration for Wi‐Fi and Wi‐Max applications

Abstract

In this paper, broadband circularly polarized S‐shaped patch antenna is designed with a reactive impedance surface (RIS). Besides the RIS structure, the frequency‐selective surface (FSS) superstrate is deployed to enrich the antenna gain. The S‐shaped patch is modeled on an FR4 glass epoxy and its feed position is set to resonate at 5.3 GHz. The 6 × 6 array size of square patches forms the RIS structure which is inserted in the middle of the S‐shaped patch and ground plane to enhance −10 dB impedance bandwidth and 3 dB axial ratio bandwidth. The 6 × 6 array of unit cells forms the FSS superstrate which is deployed approximately half‐wavelength (≈λ/2) height above the ground plane to act like a Fabry Perot cavity (FPC) resonator antenna for improving the antenna gain. The combination of RIS and FSS with an S‐shaped patch antenna improves the −10 dB impedance bandwidth, 3 dB axial ratio bandwidth, and the gain simultaneously. The proposed antenna resonates over a wide frequency range with a −10 dB impedance bandwidth of 31.8% (4.81–6.63 GHz) and the antenna has a good 3 dB axial ratio bandwidth of 18.9% (4.99–6.03 GHz). The antenna peak gain is around 10 dBi. The proposed antenna prototype is measured in the anechoic chamber and the measured results mimic the simulation results.

Microstrip-Ministered Proximity-Coupled Stacked Dual-Port Antenna for 6G Applications

“…As a result, the antenna substrate constitutes a crucial part that influences the input impedance, and mutual coupling between the antenna and its image. A potential remedy for these issues constitutes the integration of periodic microstrip patches on the surface of a metal-backed dielectric substrate, typically referred as RIS [28]- [30]. Perfect magnetic and electrical conductors exhibit reflection phases of 180°and 0°, respectively.…”

Advancements in Mobile Communication: A Novel Sectoral Antenna Design Incorporating Magneto-Electric Curved Strip Dipoles and PRS Superstrate

“…On the superstrate front, the radiator plays a pivotal role in wave propagation. Some innovative designs include the broadband circularly polarized S-shaped patch antenna with a reactive impedance surface (RIS) in [19], boasting a gain of 10 dBi. In another study, [20] introduced an antenna that achieved a gain increase of 9.75 dBi.…”

Aperture coupled CPW feed for high gain and broadband circularly polarized slot loaded square patch metasurface antenna

“…To design a unidirectional broadside radiation pattern with slot antennas, the metasurface should be placed on one side of the slot antennas. The broadband linear polarization and broadband circular polarization has been attained by placing metasurface in another substrate layer 1–10 …”

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