Bandwidth‐enhancement of circularly‐polarized fabry‐perot antenna using single‐layer partially reflective surface

Abstract

In this article, we investigate bandwidth‐enhancement of a circularly‐polarized (CP) Fabry‐Perot antenna (FPA) using single‐layer partially reflective surface (PRS). The FPA is composed of a single‐feed truncated‐corner square patch antenna, which is covered by the PRS formed by a square aperture array. We revealed that the finite‐sized PRS produces extra resonances and CP radiations for the antenna system, which broadened the impedance matching and axial ratio (AR) bandwidths significantly. For verification, a broadband CP FPA prototype operating near 5.8 GHz was realized and tested. The fabricated antenna with overall size of 125 mm × 125 mm × 23.5 mm achieves a |S11| < −10 dB bandwidth of 31.7% (5.23‐7.2 GHz), an AR < 3‐dB bandwidth of 13.7% (5.45‐6.25 GHz), the peak gain of 13.3 dBic, a 3‐dB gain bandwidth of 22.38% (5.0‐6.26 GHz), and a radiation efficiency of >91%.

Design of a wideband Fabry–Perot resonator antenna with a double‐layer partially reflective surface

“…References 9, 11, 21 provide a larger peak gain, but the proposed design has a larger plane size. Compared with the designs in References 12, 13, 27, 28 our proposed design has the highest gain and the smallest aperture.…”

S-Shaped Metasurface-Based Wideband Circularly Polarized Patch Antenna for C-Band Applications

“…achieve an IBW of 36% (3.22 -4.63 GHz) and 3-dB ARBW of 28.3% . A CP single-fed cornertruncated square Fabry-Perot patch antenna with simple MTS structure for C-band spectrum achieved an IBW of 31.7% (5.23 -7.20 GHz) and 3-dB ARBW of 13.7% (5.45 -6.25 GHz) [16]. In [17], a crossed dipole CP antenna with 6 × 6 rectangular MTS structure achieved an IBW of 31.6% (2 -2.75 GHz) and 3-dB ARBW of 23.2% (2.1 -2.65 GHz).…”

“…The MTS-based CP antennas [16]- [18] require a cavity resonant condition (i.e., air gaps between substrates) to realize wide CP bandwidth [19], resulting in antenna bulkiness due to the gaps. To tackle the bulkiness, compact MTS-based CP antennas were proposed to efficiently improve the IBW, ARBW, and radiation performance [20]- [21].…”

Sequentially rotated polarization conversion metasurface for circularly polarized Fabry‐Perot cavity antenna

“…To obtain high gain property of the CP antenna, the Fabry-Perot cavity (FPC) antenna is a good candidate due to its simple structure and inherent high gain characteristics. [2][3][4][5][6][7][8][9][10][11][12] Using the linear to circular PCM to realize CP-FPC antenna is a very effective method. [13][14][15][16][17][18][19] A PCM and four LP slot antennas compose a high gain CP-FPC antenna in Ref.…”