Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna

Yao Feng; Jianying Li; Bao Cao; Jie Liu; Guangwei Yang; Du Juan Wei

doi:10.1109/LAWP.2019.2948710

Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna

Yao Feng, Jianying Li, Bao Cao, Jie Liu, Guangwei Yang, Du Juan Wei

School of Electronics and Information

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

This letter presents a broadband circularly polarized (CP) cross-dipole antenna. It consists of crossed dipoles, parasitic elements, a cavity-backed reflector, and a circular ring reflector. The arms of crossed dipoles are divided into two sectors by a slit. The parasitic elements are utilized to significantly enhance the CP bandwidth. A circular ring reflector is adopted to optimize the radiation pattern and improve the gain in high frequency band. The fabricated prototype of the proposed antenna with an overall size of 0.60λ₀ × 0.60λ₀ × 0.21λ₀ (λ₀ is the free-space wavelength at the lowest CP operating frequency) yields a measured impedance bandwidth of 98.2% for |S₁₁|<-10 dB (1.73-5.07 GHz) and a 3 dB axial-ratio bandwidth of 85.5% (1.94-4.84 GHz). The antenna has stable radiation patterns from 1.94 to 4.5 GHz and exhibits a right-hand circular polarization with a peak gain of approximately 10.0 dBic at 3.6 GHz.

Original language	English
Article number	8878120
Pages (from-to)	2681-2685
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	18
Issue number	12
DOIs	https://doi.org/10.1109/LAWP.2019.2948710
State	Published - Dec 2019

Keywords

Back cavity
broadband antenna
circular polarization
crossed dipole
gain

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10.1109/LAWP.2019.2948710

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title = "Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna",

abstract = "This letter presents a broadband circularly polarized (CP) cross-dipole antenna. It consists of crossed dipoles, parasitic elements, a cavity-backed reflector, and a circular ring reflector. The arms of crossed dipoles are divided into two sectors by a slit. The parasitic elements are utilized to significantly enhance the CP bandwidth. A circular ring reflector is adopted to optimize the radiation pattern and improve the gain in high frequency band. The fabricated prototype of the proposed antenna with an overall size of 0.60λ0 × 0.60λ0 × 0.21λ0 (λ0 is the free-space wavelength at the lowest CP operating frequency) yields a measured impedance bandwidth of 98.2% for |S11|<-10 dB (1.73-5.07 GHz) and a 3 dB axial-ratio bandwidth of 85.5% (1.94-4.84 GHz). The antenna has stable radiation patterns from 1.94 to 4.5 GHz and exhibits a right-hand circular polarization with a peak gain of approximately 10.0 dBic at 3.6 GHz.",

keywords = "Back cavity, broadband antenna, circular polarization, crossed dipole, gain",

author = "Yao Feng and Jianying Li and Bao Cao and Jie Liu and Guangwei Yang and Wei, {Du Juan}",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2019",

month = dec,

doi = "10.1109/LAWP.2019.2948710",

language = "英语",

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T1 - Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna

AU - Feng, Yao

AU - Li, Jianying

AU - Cao, Bao

AU - Liu, Jie

AU - Yang, Guangwei

AU - Wei, Du Juan

PY - 2019/12

Y1 - 2019/12

N2 - This letter presents a broadband circularly polarized (CP) cross-dipole antenna. It consists of crossed dipoles, parasitic elements, a cavity-backed reflector, and a circular ring reflector. The arms of crossed dipoles are divided into two sectors by a slit. The parasitic elements are utilized to significantly enhance the CP bandwidth. A circular ring reflector is adopted to optimize the radiation pattern and improve the gain in high frequency band. The fabricated prototype of the proposed antenna with an overall size of 0.60λ0 × 0.60λ0 × 0.21λ0 (λ0 is the free-space wavelength at the lowest CP operating frequency) yields a measured impedance bandwidth of 98.2% for |S11|<-10 dB (1.73-5.07 GHz) and a 3 dB axial-ratio bandwidth of 85.5% (1.94-4.84 GHz). The antenna has stable radiation patterns from 1.94 to 4.5 GHz and exhibits a right-hand circular polarization with a peak gain of approximately 10.0 dBic at 3.6 GHz.

AB - This letter presents a broadband circularly polarized (CP) cross-dipole antenna. It consists of crossed dipoles, parasitic elements, a cavity-backed reflector, and a circular ring reflector. The arms of crossed dipoles are divided into two sectors by a slit. The parasitic elements are utilized to significantly enhance the CP bandwidth. A circular ring reflector is adopted to optimize the radiation pattern and improve the gain in high frequency band. The fabricated prototype of the proposed antenna with an overall size of 0.60λ0 × 0.60λ0 × 0.21λ0 (λ0 is the free-space wavelength at the lowest CP operating frequency) yields a measured impedance bandwidth of 98.2% for |S11|<-10 dB (1.73-5.07 GHz) and a 3 dB axial-ratio bandwidth of 85.5% (1.94-4.84 GHz). The antenna has stable radiation patterns from 1.94 to 4.5 GHz and exhibits a right-hand circular polarization with a peak gain of approximately 10.0 dBic at 3.6 GHz.

KW - Back cavity

KW - broadband antenna

KW - circular polarization

KW - crossed dipole

KW - gain

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JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

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ER -

Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna

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