A circularly polarized pattern diversity antenna for hemispherical coverage

Changjiang Deng; Yue Li; Zhijun Zhang; Zhenghe Feng

doi:10.1109/TAP.2014.2342763

A circularly polarized pattern diversity antenna for hemispherical coverage

Changjiang Deng^*, Yue Li, Zhijun Zhang, Zhenghe Feng

^*Corresponding author for this work

Tsinghua University

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

39 Citations (Scopus)

Abstract

In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.

Original language	English
Article number	2342763
Pages (from-to)	5365-5369
Number of pages	5
Journal	IEEE Transactions on Antennas and Propagation
Volume	62
Issue number	10
DOIs	https://doi.org/10.1109/TAP.2014.2342763
Publication status	Published - 1 Oct 2014
Externally published	Yes

Keywords

Circular polarization
Hemispherical coverage
Pattern diversity antenna
Satellite communications

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10.1109/TAP.2014.2342763

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title = "A circularly polarized pattern diversity antenna for hemispherical coverage",

abstract = "In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.",

keywords = "Circular polarization, Hemispherical coverage, Pattern diversity antenna, Satellite communications",

author = "Changjiang Deng and Yue Li and Zhijun Zhang and Zhenghe Feng",

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doi = "10.1109/TAP.2014.2342763",

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T1 - A circularly polarized pattern diversity antenna for hemispherical coverage

AU - Deng, Changjiang

AU - Li, Yue

AU - Zhang, Zhijun

AU - Feng, Zhenghe

PY - 2014/10/1

Y1 - 2014/10/1

N2 - In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.

AB - In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.

KW - Circular polarization

KW - Hemispherical coverage

KW - Pattern diversity antenna

KW - Satellite communications

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A circularly polarized pattern diversity antenna for hemispherical coverage

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Keywords

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