A Wideband Circularly Polarized Antenna with High Impulse Signal Fidelity for IR-UWB Positioning Applications

A wideband circularly polarized (CP) antenna with conical-beam radiation is designed by a circular monopolar patch antenna (CMPA) with a tapered feeding, eight shorting pins, and eight sickle-shaped branches in the ground plane. Firstly, the TM01 and TM02 modes and the sickle-shaped branches are pre...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2024-04, Vol.71 (4), p.1-1
Main Authors: Yang, Wei, Huang, Chaogui, Zhu, Xiaozhang, Huang, Wei, Xu, Liming
Format: Article
Language:English
Subjects:
Accuracy
Bandwidth
Bandwidths
Broadband antennas
Cavity model
Circular polarization
circularly polarized (CP)
Feeding
Ground plane
High impulse
Impedance
Impedance matching
impulse-radio ultra-wideband (IR-UWB)
Monopole antennas
omnidirectional
Patch antennas
Pins
Probes
Resonant frequency
tapered feeding
Ultrawideband
Wideband
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Description
Summary:A wideband circularly polarized (CP) antenna with conical-beam radiation is designed by a circular monopolar patch antenna (CMPA) with a tapered feeding, eight shorting pins, and eight sickle-shaped branches in the ground plane. Firstly, the TM01 and TM02 modes and the sickle-shaped branches are presented to generate the radiated θ-polarization and φ-polarization components, respectively. Secondly, a tapered feeding probe with a larger radius is then employed to reduce the input resistance and improve the impedance matching of this antenna fed at the center. Therefore, the proposed antenna has a 10dB impedance bandwidth of 46.8% and a 3dB axial ratio (AR) bandwidth of 36.7%. Consequently, the attractive performance of the antenna with high impulse signal fidelity (97.4%) demonstrates its capacity for impulse-radio ultra-wideband (IR-UWB) positioning applications in a multipath interference environment.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2023.3330073