Directivity enhancement of circular polarized patch antenna using ring‐shaped frequency selective surface superstrate

Abstract

ABSTRACT:In this letter, a ring-shaped frequency selective surface (FSS)

High gain planar resonant cavity antennas based on metamaterial and frequency selective surfaces

“…And in second method circularly polarized (CP) antenna is used as a primary source, which is loaded with a artificial superstrate that supports CP radiation [57]. Chiral metamaterials are used as artificial superstrate over CP antenna [58].…”

Design Method of a Circularly-Polarized Antenna Using Fabry-Pérot Cavity Structure

“…Although such high-gain antennas are easily designed without complicated feeding networks, a CP source antenna is needed to produce the CP in cavity antennas. A highgain CP antenna based on an EBG resonator has been developed [14], [15]. It is possible to design a high-gain CP antenna using EBG resonator antennas with the CP source in the cavity.…”

Simultaneous Gain and Bandwidths Enhancement of a Single-Feed Circularly Polarized Microstrip Patch Antenna Using a Metamaterial Reflective Surface

“…According to our literature review, most papers focus on the superstrate's effects in linearly polarized antennas. Only a few have reported simultaneous gain and bandwidths enhancement for the CP-MPAs [13][14][15]. In [13,14], the use of FSS superstrates to enhance directivity was proposed, but only gain enhancement has been achieved; neither ARBW nor ZBW improved.…”

“…Only a few have reported simultaneous gain and bandwidths enhancement for the CP-MPAs [13][14][15]. In [13,14], the use of FSS superstrates to enhance directivity was proposed, but only gain enhancement has been achieved; neither ARBW nor ZBW improved. In [15], a CP-MPA was integrated with the planar periodic EBG structure to improve both the ZBW and ARBW, to the extent possible, but gain enhancement was not significant.…”