Abstract
A double-layer frequency selective surface (FSS) is proposed as a means to enhance the bandwidth of an electromagnetic band gap (EBG) resonator antenna. Due to its inverted reflection phase variation and its wide selectivity bandwidth, the structure used in the radiating wall of the resonator allows increasing the radiating bandwidth of the last one. The resonator is fed by a patch feeding source placed inside the cavity at the proximity of its metallic ground. The antenna bandwidth is significantly improved by virtue of employing the double-layer FSS. Modelled results of an antenna working at 5 GHz are shown.
Highlights
In the past few years, new solutions that combine directivity and simple feeding mechanism have been proposed to design compact antennas
Recent works presented by Feresidis and Vardaxoglou [5] have demonstrated a bandwidth enhancement of a resonator antenna, in which the antenna thickness was equal to the operating wavelength
We propose improving the bandwidth of a λ/2 electromagnetic band gap (EBG) resonator antenna using double-layer frequency selective surface (FSS) as the cavity radiating wall
Summary
In the past few years, new solutions that combine directivity and simple feeding mechanism have been proposed to design compact antennas. While important gain values have been realised, the antenna profile has been kept compact (close to the half wavelength). One drawback of this system is its narrow bandwidth; only one frequency and a limited range around this central frequency satisfy the resonant model. Recent works presented by Feresidis and Vardaxoglou [5] have demonstrated a bandwidth enhancement of a resonator antenna, in which the antenna thickness was equal to the operating wavelength. They used combined FSS to create the cavity radiating wall. The optimised resonant structure that allows improving bandwidth of printed microwave antennas is described
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