Broadband circularly polarized Fabry‐Perot antenna utilizing Archimedean spiral radiator and multi‐layer partially reflecting surface

Abstract

This article presents a method to design broadband circularly polarized (CP) Fabry‐Perot Resonator (FPR) antenna. The proposed antenna is based on multi‐layer thin dielectric slabs arranged in close proximity as a partially reflecting surface (PRS) and an Archimedean spiral as a CP radiating source. Experimental results show a broadband operation from 6 to 13 GHz, in which the reflection coefficient is less than −10 dB and the axial ratio (AR) is lower than 3 dB. In addition, good radiation patterns and high broadside gain of better than 10.8 dBic are achieved over the operating bandwidth. The proposed antenna can be used for C‐ and X‐band satellite communications.

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

“…In comparison with the CP FPAs using narrow‐band feeding elements, the proposed FPA yielded a significant improvement in the operational bandwidth. Although the operational bandwidth is narrower than compared to the CP FPAs using broadband feeding‐elements and PRS structures, the proposed FPA has a simpler configuration and a lower profile.…”

“…Most of the previous FPAs, however, essentially focused the gain‐bandwidth enhancement; their improvements in terms of impedance matching bandwidths and axial ratio (AR) characteristics have thus far been neglected. For demonstrating the broad gain‐bandwidth, the FPAs popularly utilized wideband feed antennas, such as slot waveguide antennas, enlarged‐dipole, crossed bowtie‐dipoles, dual‐feed stacked patch antenna, and Archimedean spiral antenna, and therefore, their operational bandwidths are normally narrower than those of the feeding elements. Narrow‐band antenna types (eg, dipole or conventional patch), which typically yielded only one‐resonance, were also employed as the feed element of the broadband FPAs .…”

“…In order to achieve the desired Φ PRS response for the broadband operation, a variety of different PRS structures have been proposed for the FPA. Examples include multi-layer frequency selective surfaces, 5-8 metasurface with tapered near-zero effective index, 9 multiple dielectric superstrates, [10][11][12][13][14]19,22,24 thick dielectric superstrate. [15][16][17][18] Most of the previous FPAs, however, essentially focused the gain-bandwidth enhancement; their improvements in terms of impedance matching bandwidths and axial ratio (AR) characteristics have thus far been neglected.…”

A multi frequency point broadband compound antenna for partial discharge detection in gas insulated switchgear

“…The external sensor is widely used for its advantages of flexible installation, no damage to the internal electric field of GIS, no impact on the operation of equipment, and can be used for on‐line monitoring. Research on external sensors includes analyses of: Archimedean spiral antenna sensors, 4 dipole antenna sensors, 5 microstrip patch antenna sensors, 6 fractal antenna sensors, 7 etc. Archimedes spiral antenna is not limited by the working frequency band in theory, but it has large volume and relatively narrow receiving frequency band, so it has no advantage in detecting GIS PD; microstrip antenna has a thin planar structure, which is convenient for conformal, simple to manufacture, and low cost, but it has the disadvantages of narrow detection frequency band and difficult detection of low‐frequency signals; fractal antenna has unique advantages in size compression, but sacrifices important indicators such as antenna bandwidth, voltage standing wave ratio, and gain.…”

Development of Multilayer Partially Reflective Surfaces for Highly Directive Cavity Antennas: A Study

“…ey are also employable in cognitive application for beam scanning, with recon gurable designs using microelectromechanical switches (MEMS) and active elements [33][34][35]. FPC antennas are also employed in UWB applications [36,37].…”