Decoupling and Sequential Array Antennas - Effects of Coplanar Feedline on Radiation Characteristics

Kazuhide Hirose; Yuto Kikkawa; Hisamatsu Nakano

doi:10.1109/LAWP.2020.2971320

Decoupling and Sequential Array Antennas - Effects of Coplanar Feedline on Radiation Characteristics

Kazuhide Hirose, Yuto Kikkawa, Hisamatsu Nakano

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

7 Citations (Scopus)

Abstract

Using the method of moments, we investigate two types of circularly polarized loop array antennas with and without a coplanar feedline (CF). The loops and the CF are located above a ground plane at a height of a quarter-wavelength. First, we analyze decoupling two-element array antennas. It is found that the antennas with and without the CF show reduced cross-polarization levels of -15 and -16 dB, respectively, when compared with that (-8 dB) of a conventional two-element array antenna without a CF. Next, we analyze sequential two-element array antennas. It is revealed that the antennas with and without a CF have bandwidths of 23% for a 3 dB axial-ratio criterion and 49% for a 3 dB gain-drop criterion, respectively. The analysis results are validated by an experimental work.

Original language	English
Article number	8979441
Pages (from-to)	423-427
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	19
Issue number	3
DOIs	https://doi.org/10.1109/LAWP.2020.2971320
Publication status	Published - 2020 Mar

Keywords

Array antennas
Circular polarization
Decoupling array antenna
Loop antenna
Sequential array antenna

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/LAWP.2020.2971320

Cite this

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title = "Decoupling and Sequential Array Antennas - Effects of Coplanar Feedline on Radiation Characteristics",

abstract = "Using the method of moments, we investigate two types of circularly polarized loop array antennas with and without a coplanar feedline (CF). The loops and the CF are located above a ground plane at a height of a quarter-wavelength. First, we analyze decoupling two-element array antennas. It is found that the antennas with and without the CF show reduced cross-polarization levels of -15 and -16 dB, respectively, when compared with that (-8 dB) of a conventional two-element array antenna without a CF. Next, we analyze sequential two-element array antennas. It is revealed that the antennas with and without a CF have bandwidths of 23% for a 3 dB axial-ratio criterion and 49% for a 3 dB gain-drop criterion, respectively. The analysis results are validated by an experimental work.",

keywords = "Array antennas, Circular polarization, Decoupling array antenna, Loop antenna, Sequential array antenna",

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

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year = "2020",

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doi = "10.1109/LAWP.2020.2971320",

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journal = "IEEE Antennas and Wireless Propagation Letters",

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T1 - Decoupling and Sequential Array Antennas - Effects of Coplanar Feedline on Radiation Characteristics

AU - Hirose, Kazuhide

AU - Kikkawa, Yuto

AU - Nakano, Hisamatsu

PY - 2020/3

Y1 - 2020/3

N2 - Using the method of moments, we investigate two types of circularly polarized loop array antennas with and without a coplanar feedline (CF). The loops and the CF are located above a ground plane at a height of a quarter-wavelength. First, we analyze decoupling two-element array antennas. It is found that the antennas with and without the CF show reduced cross-polarization levels of -15 and -16 dB, respectively, when compared with that (-8 dB) of a conventional two-element array antenna without a CF. Next, we analyze sequential two-element array antennas. It is revealed that the antennas with and without a CF have bandwidths of 23% for a 3 dB axial-ratio criterion and 49% for a 3 dB gain-drop criterion, respectively. The analysis results are validated by an experimental work.

AB - Using the method of moments, we investigate two types of circularly polarized loop array antennas with and without a coplanar feedline (CF). The loops and the CF are located above a ground plane at a height of a quarter-wavelength. First, we analyze decoupling two-element array antennas. It is found that the antennas with and without the CF show reduced cross-polarization levels of -15 and -16 dB, respectively, when compared with that (-8 dB) of a conventional two-element array antenna without a CF. Next, we analyze sequential two-element array antennas. It is revealed that the antennas with and without a CF have bandwidths of 23% for a 3 dB axial-ratio criterion and 49% for a 3 dB gain-drop criterion, respectively. The analysis results are validated by an experimental work.

KW - Array antennas

KW - Circular polarization

KW - Decoupling array antenna

KW - Loop antenna

KW - Sequential array antenna

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Decoupling and Sequential Array Antennas - Effects of Coplanar Feedline on Radiation Characteristics

Abstract

Keywords

ASJC Scopus subject areas

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