M字形誘電体アレー構造による広帯域移相器

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2021/08/01

タイトル(英語): A Wideband Phase Shifter Utilizing M-shaped Dielectric Arrays

著者名: 孫　冉（茨城大学工学部），武田　茂樹（茨城大学工学部），鹿子嶋　憲一（茨城大学工学部）

著者名(英語): Ran Sun (The College of Engineering, Ibaraki University), Shigeki Takeda (The College of Engineering, Ibaraki University), Kenichi Kagoshima (The College of Engineering, Ibaraki University)

キーワード: 移相器，誘電体，アレー配置，広帯域，基地局アンテナ　　Phase shifter，Dielectric，Array structure，Wideband，Base station antenna

要約(英語): This paper proposes a new design procedure and structure of a wideband dielectric phase shifter for mobile base stations. Phase shifters are used to tilt the main beam direction of a base station antenna array in the elevation angle. Recently, to enhance communication capacity for accommodating increasing data traffics due to the increased number of smartphones and tablets, multiple frequency bands were added in mobile communication systems. Therefore, wideband phase shifters are demanded. The proposed phase shifter composes two arrayed M-shaped dielectrics to introduce a periodic dielectric structure. This structure enhances a frequency bandwidth by creating a lower resonant frequency. Because resonant frequencies and bandwidth of the proposed phase shifter can be adjusted by using a design equation of the M-shaped dielectric phase shifter, the proposed method can simplify a wideband phase shifter design. Frequency responses of voltage standing wave ratio (VSWR) less than 1.2 were theoretically analyzed, satisfying a frequency range from 1.4 to 2.2GHz. This range covers 1.5, 1.7, and 2.2GHz band, where this phase shifter is designed to obtain a phase shift of 60 deg. at the center frequency, 1.8GHz. A prototype of the proposed phase shifter was fabricated to validate the frequency responses of VSWR less than 1.2. The experimental result confirmed that the proposed phase shifter can approximately realize the objective bandwidth.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.141 No.8 （2021） 特集：Smart Cityのためのモビリティ及び通信技術

本誌掲載ページ: 874-880 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/141/8/141_874/_article/-char/ja/