A Compact CPW-Fed Low-Profile Wideband Circularly Polarized Slot Antenna with a Planar Ring Reflector for GNSS Applications

Autor: Jiade Yuan, Yujie Li, Zhimeng Xu, Jiamin Zheng
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: International Journal of Antennas and Propagation, Vol 2019 (2019)
Druh dokumentu: article
ISSN: 1687-5869
1687-5877
DOI: 10.1155/2019/6463101
Popis: A compact low-profile wideband circularly polarized slot antenna for global navigation satellite system (GNSS) is presented. The antenna comprises a planar slot radiator with a coplanar waveguide (CPW) feed and a modified ring-shaped reflector to achieve unidirectional radiation. The modified reflector is an inner square patch with four slantly cut corners, a center ring, and an outer ring with a notch; they significantly reduce the separation between the antenna radiator and reflector and therefore the overall antenna height. The overall dimensions are λ0/3 × λ0/3 × λ0/30 (λ0 denotes the free space wavelength at lower frequency). The measured −10 dB bandwidth of |S11|, 3-dB axial ratio (AR) bandwidth, and maximum gain are of 1.53–2.28 GHz, 1.558–1.672 GHz, and 5.87 dBi, respectively. The proposed antenna is simple without any additional feeding networks or shorting probes.
Databáze: Directory of Open Access Journals
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