Compact Wideband Circularly Polarized Patch Antenna for CNSS Applications

A compact wideband circularly polarized (CP) patch antenna utilizing a quad-feed network (QFN) and quadruple semi-fan-annulus (QSFA) patches is proposed. For using a coupled-line dual-band power divider (PD) and improved phase shifter (PS) with stepped-impedance-open-stub (SIOS), the QFN has a compa...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2013, Vol.12, p.1280-1283
Main Authors: Liu, Qiang, Liu, Yuanan, Wu, Yongle, Su, Ming, Shen, Junyu
Format: Article
Language:English
Subjects:
Antenna measurements
Broadband antennas
Circular polarization
Compass Navigation Satellite System (CNSS)
GPS
patch antenna
Patch antennas
stepped-impedance-open-stub
Substrates
Wideband
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Summary:A compact wideband circularly polarized (CP) patch antenna utilizing a quad-feed network (QFN) and quadruple semi-fan-annulus (QSFA) patches is proposed. For using a coupled-line dual-band power divider (PD) and improved phase shifter (PS) with stepped-impedance-open-stub (SIOS), the QFN has a compact size and exhibits the electromagnetic (EM) simulated bandwidth over 96% for the power distribution -6.5±0.5 dB, return loss (RL) > 14 dB, and a consistent 90° (±9°) phase deviation. Moreover, the QSFA patches can expand the CP bandwidth and reduce the size of the antenna effectively. Measurement results show that the proposed antenna achieves CP bandwidth of 72% from 1.15 to 2.45 GHz for RL > 10 dB, axial ratio dB, and 3-dB gain variation (gain > 4.4 dBi). Therefore, the proposed antenna is a good candidate for Compass Navigation Satellite System (CNSS) applications.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2013.2283218