Broadband Electrically Small Circularly Polarized Directive Antenna

Broadband Electrically Small Circularly Polarized Directive Antenna

A broadband electrically small antenna with directive circularly polarized radiation is presented. It is composed of a compact single-feed crossed dipole driver, which is backed by a near-field resonant parasitic (NFRP) reflector to achieve the directive radiation pattern. The NFRP reflector is desi...

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Bibliographic Details
Main Authors: Son Xuat Ta, Ikmo Park, Richard W. Ziolkowski
Format: Article
Language:English
Published: IEEE 2017-01-01
Series:IEEE Access
Subjects:
Broadband
circular polarization
crossed dipole
directive radiation
near-field resonant parasitic reflector
small antenna
Online Access:https://ieeexplore.ieee.org/document/7987698/
Description
Summary:A broadband electrically small antenna with directive circularly polarized radiation is presented. It is composed of a compact single-feed crossed dipole driver, which is backed by a near-field resonant parasitic (NFRP) reflector to achieve the directive radiation pattern. The NFRP reflector is designed to generate extra resonances and minimum axial ratio (AR) points in the antenna system. These features are combined with those resulting from the driver to broaden the operational bandwidth. The proposed antenna was fabricated and measured. The antenna prototype, with a low profile (0.066 &#x03BB;<sub>o</sub> at 1.45 GHz) and an electrically small size (ka = 0.71 at 1.45 GHz), has a measured |S11| &lt;; -10 dB bandwidth of 25.66% (1.362-1.763 GHz) and a 3-dB AR bandwidth of 10.56% (1.390-1.545 GHz). Additionally, the measurements resulted in a broadside gain of 2.31 &#x00B1; 0.4 dBic and an average radiation efficiency of 80% within the operational bandwidth.
ISSN:2169-3536

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