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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-07-14
Compact Ultra-Wideband Circularly Polarized Crossed-Dipole Antenna with Wide Angle Coverage
By
Chao Li,

    Dr. Chao Li

    Xidian University

    China

    Homepage

Ze-Hong Yan,

    Dr. Ze-Hong Yan

    Xidian University

    China

    Homepage

Wei Hu

    Dr. Wei Hu

    Xidian University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 111, 85-91, 2023
doi:10.2528/PIERL23021405 | Google Scholar

Abstract
This letter presents a compact ultra-wideband circularly polarized (CP) crossed-dipole antenna with enhanced axial-ratio beamwidth (ARBW) and half-power beamwidth (HPBW). It consists of four modified arms which are fed by vacant-quarter phase delay rings to excite CP radiation. Four parasitic elements are utilized rotationally between the dipoles and the reflector. Not only does inducing vertical currents on the parasitic patches excite additional impedance resonance to realize an ultra-wideband operating, but also reinforced radiation is obtained to improve the ARBW and HPBW. The experimental results show that the proposed antenna realizes a -10 dB impedance bandwidth of 134.3%, and a 3 dB axial-ratio (AR) bandwidth of 115.0%, while holding a compact volume of 0.25λL × 0.25λL × 0.09λL (λL: wavelength at the lowest operating frequency). Furthermore, an HPBW and ARBW of more than 110° and 160° are realized within a broad operating band of 67.5% and 55.0%, respectively.
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Citation
Chao Li, Ze-Hong Yan, and Wei Hu, "Compact Ultra-Wideband Circularly Polarized Crossed-Dipole Antenna with Wide Angle Coverage," Progress In Electromagnetics Research Letters, Vol. 111, 85-91, 2023.
doi:10.2528/PIERL23021405
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