Broadband monopole Yagi-Uda antenna

Yujiro Taguchi; Qiang Chen; Kunio Sawaya

doi:10.1002/ecja.1067

Broadband monopole Yagi-Uda antenna

Yujiro Taguchi, Qiang Chen, Kunio Sawaya

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

4 Citations (Scopus)

Abstract

A broadband Yagi-Uda antenna composed of several monopole elements is proposed. By locating the director close to the excited element and superposing the characteristics of the reflector in a lower band to those of the director in a higher band, a broadband property is obtained for both the input impedance and the unidirectional pattern. Analysis by the method of moments indicates that the Yagi-Uda antenna (type 1) composed of three monopole elements has a bandwidth of 1:1.67 for VSWR ≤ 2, 1:1.84 for G_d/G_r ≥ 9 dB, and more than one octave for G_d ≥ 8 dBi, where G_d and G_r denote the directive gains in the front and back directions, respectively. It is also shown that the Yagi-Uda antenna (type 4) composed of five monopole elements has about one octave for a bandwidth of VSWR ≤ 2 and G_d ≥ 8 dBi.

Original language	English
Pages (from-to)	49-57
Number of pages	9
Journal	Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume	85
Issue number	1
DOIs	https://doi.org/10.1002/ecja.1067
Publication status	Published - 2002 Jan 10

Keywords

Aeronautical antenna
Broadband characteristics
Closely located elements
Monopole antenna
Yagi-Uda antenna

ASJC Scopus subject areas

Computer Networks and Communications
Electrical and Electronic Engineering

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10.1002/ecja.1067

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title = "Broadband monopole Yagi-Uda antenna",

abstract = "A broadband Yagi-Uda antenna composed of several monopole elements is proposed. By locating the director close to the excited element and superposing the characteristics of the reflector in a lower band to those of the director in a higher band, a broadband property is obtained for both the input impedance and the unidirectional pattern. Analysis by the method of moments indicates that the Yagi-Uda antenna (type 1) composed of three monopole elements has a bandwidth of 1:1.67 for VSWR ≤ 2, 1:1.84 for Gd/Gr ≥ 9 dB, and more than one octave for Gd ≥ 8 dBi, where Gd and Gr denote the directive gains in the front and back directions, respectively. It is also shown that the Yagi-Uda antenna (type 4) composed of five monopole elements has about one octave for a bandwidth of VSWR ≤ 2 and Gd ≥ 8 dBi.",

keywords = "Aeronautical antenna, Broadband characteristics, Closely located elements, Monopole antenna, Yagi-Uda antenna",

author = "Yujiro Taguchi and Qiang Chen and Kunio Sawaya",

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doi = "10.1002/ecja.1067",

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AU - Taguchi, Yujiro

AU - Chen, Qiang

AU - Sawaya, Kunio

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N2 - A broadband Yagi-Uda antenna composed of several monopole elements is proposed. By locating the director close to the excited element and superposing the characteristics of the reflector in a lower band to those of the director in a higher band, a broadband property is obtained for both the input impedance and the unidirectional pattern. Analysis by the method of moments indicates that the Yagi-Uda antenna (type 1) composed of three monopole elements has a bandwidth of 1:1.67 for VSWR ≤ 2, 1:1.84 for Gd/Gr ≥ 9 dB, and more than one octave for Gd ≥ 8 dBi, where Gd and Gr denote the directive gains in the front and back directions, respectively. It is also shown that the Yagi-Uda antenna (type 4) composed of five monopole elements has about one octave for a bandwidth of VSWR ≤ 2 and Gd ≥ 8 dBi.

AB - A broadband Yagi-Uda antenna composed of several monopole elements is proposed. By locating the director close to the excited element and superposing the characteristics of the reflector in a lower band to those of the director in a higher band, a broadband property is obtained for both the input impedance and the unidirectional pattern. Analysis by the method of moments indicates that the Yagi-Uda antenna (type 1) composed of three monopole elements has a bandwidth of 1:1.67 for VSWR ≤ 2, 1:1.84 for Gd/Gr ≥ 9 dB, and more than one octave for Gd ≥ 8 dBi, where Gd and Gr denote the directive gains in the front and back directions, respectively. It is also shown that the Yagi-Uda antenna (type 4) composed of five monopole elements has about one octave for a bandwidth of VSWR ≤ 2 and Gd ≥ 8 dBi.

KW - Aeronautical antenna

KW - Broadband characteristics

KW - Closely located elements

KW - Monopole antenna

KW - Yagi-Uda antenna

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Broadband monopole Yagi-Uda antenna

Abstract

Keywords

ASJC Scopus subject areas

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