Dual-Loop Arrays Fed by Coplanar Parallel Lines for Wideband Circular Polarization

Kazuhide Hirose; Yuto Kikkawa; Hisamatsu Nakano

doi:10.1109/LAWP.2021.3054587

Dual-Loop Arrays Fed by Coplanar Parallel Lines for Wideband Circular Polarization

Kazuhide Hirose, Yuto Kikkawa, Hisamatsu Nakano

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

2 Citations (Scopus)

Abstract

Using the method of moments, we analyze three types of series-fed array antennas for circular polarization. First, we present a reference antenna's radiation characteristics with symmetrical dual loops fed by balanced parallel lines. Next, we modify the symmetrical dual loops into asymmetrical ones to enhance a circularly polarized (CP) wave bandwidth. It is found that the modified antenna has a bandwidth of 35% for a 3 dB gain-drop criterion, where the axial ratio is less than 3 dB. Finally, we use unbalanced parallel lines for feeding the asymmetrical dual loops to simplify the feed system. It is revealed that the antenna shows a CP wave bandwidth of 19%, which is twice as wide as that of the reference antenna.

Original language	English
Article number	9336228
Pages (from-to)	478-482
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	20
Issue number	4
DOIs	https://doi.org/10.1109/LAWP.2021.3054587
Publication status	Published - 2021 Apr

Keywords

Array antennas
circular polarization (CP)
loop antennas
series feed
wideband antennas

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/LAWP.2021.3054587

Cite this

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title = "Dual-Loop Arrays Fed by Coplanar Parallel Lines for Wideband Circular Polarization",

abstract = "Using the method of moments, we analyze three types of series-fed array antennas for circular polarization. First, we present a reference antenna's radiation characteristics with symmetrical dual loops fed by balanced parallel lines. Next, we modify the symmetrical dual loops into asymmetrical ones to enhance a circularly polarized (CP) wave bandwidth. It is found that the modified antenna has a bandwidth of 35% for a 3 dB gain-drop criterion, where the axial ratio is less than 3 dB. Finally, we use unbalanced parallel lines for feeding the asymmetrical dual loops to simplify the feed system. It is revealed that the antenna shows a CP wave bandwidth of 19%, which is twice as wide as that of the reference antenna.",

keywords = "Array antennas, circular polarization (CP), loop antennas, series feed, wideband antennas",

author = "Kazuhide Hirose and Yuto Kikkawa and Hisamatsu Nakano",

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

year = "2021",

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doi = "10.1109/LAWP.2021.3054587",

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journal = "IEEE Antennas and Wireless Propagation Letters",

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T1 - Dual-Loop Arrays Fed by Coplanar Parallel Lines for Wideband Circular Polarization

AU - Hirose, Kazuhide

AU - Kikkawa, Yuto

AU - Nakano, Hisamatsu

PY - 2021/4

Y1 - 2021/4

N2 - Using the method of moments, we analyze three types of series-fed array antennas for circular polarization. First, we present a reference antenna's radiation characteristics with symmetrical dual loops fed by balanced parallel lines. Next, we modify the symmetrical dual loops into asymmetrical ones to enhance a circularly polarized (CP) wave bandwidth. It is found that the modified antenna has a bandwidth of 35% for a 3 dB gain-drop criterion, where the axial ratio is less than 3 dB. Finally, we use unbalanced parallel lines for feeding the asymmetrical dual loops to simplify the feed system. It is revealed that the antenna shows a CP wave bandwidth of 19%, which is twice as wide as that of the reference antenna.

AB - Using the method of moments, we analyze three types of series-fed array antennas for circular polarization. First, we present a reference antenna's radiation characteristics with symmetrical dual loops fed by balanced parallel lines. Next, we modify the symmetrical dual loops into asymmetrical ones to enhance a circularly polarized (CP) wave bandwidth. It is found that the modified antenna has a bandwidth of 35% for a 3 dB gain-drop criterion, where the axial ratio is less than 3 dB. Finally, we use unbalanced parallel lines for feeding the asymmetrical dual loops to simplify the feed system. It is revealed that the antenna shows a CP wave bandwidth of 19%, which is twice as wide as that of the reference antenna.

KW - Array antennas

KW - circular polarization (CP)

KW - loop antennas

KW - series feed

KW - wideband antennas

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Dual-Loop Arrays Fed by Coplanar Parallel Lines for Wideband Circular Polarization

Abstract

Keywords

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