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IEICE TRANSACTIONS on Communications

A Novel Quad-Band Branched Monopole Antenna with a Filter Suppressing Higher Order Modes

Shingo YAMAURA, Kengo NISHIMOTO, Yasuhiro NISHIOKA, Ryosuke KOBAYASHI, Takahiro INO, Yoshio INASAWA

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Summary :

This paper proposes a novel quad-band branched monopole antenna with a filter. The proposed antenna has a simple configuration in which branch-elements are added to a basic configuration consisting of a mast and dielectric wires. The antenna is characterized by performances such as wideband impedance matching, gain stabilization, and gain enhancement. Wideband impedance characteristics satisfying the voltage standing ratio of less than 2 are obtained by exciting a parallel resonance at the lowest band and multi-resonance at high bands. The filter suppressing higher order modes is used for gain stabilization, so that averaged gains above 5dBi are obtained at the quad-band. The antenna has a high gain of 11.1dBi because the branch-elements work as an end-fire array antenna at the highest band. Furthermore, it is clarified that an operating frequency is switched by using a variable bandpass filter at the lowest band. Last, a scale model of the antenna is fabricated and measured, then the effectiveness of the proposed antenna is demonstrated.

Publication
IEICE TRANSACTIONS on Communications Vol.E106-B No.10 pp.938-948
Publication Date
2023/10/01
Publicized
2023/05/16
Online ISSN
1745-1345
DOI
10.1587/transcom.2022EBP3192
Type of Manuscript
PAPER
Category
Antennas and Propagation

Authors

Shingo YAMAURA
  Mitsubishi Electric Corporation
Kengo NISHIMOTO
  Mitsubishi Electric Corporation
Yasuhiro NISHIOKA
  Mitsubishi Electric Corporation
Ryosuke KOBAYASHI
  Mitsubishi Electric Engineering Company Limited
Takahiro INO
  Mitsubishi Electric Engineering Company Limited
Yoshio INASAWA
  Mitsubishi Electric Corporation

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