A Miniaturized Magic-T Using Microstrip-to-Coplanar Strips Transition and its Application to a Reflection-Type Phase Shifter

Jo Tamura, Hiroyuki Arai

研究成果: ジャーナルへの寄稿記事査読

3 被引用数 (Scopus)

抄録

This article proposes a miniaturized magic-T and experimentally demonstrates that the magic-T is a suitable hybrid circuit for designing a wideband reflection-type phase shifter (RTPS) with a simple configuration. Conventional RTPSs employ quadrature hybrid couplers with narrow bandwidths and complicated structures. The proposed magic-T makes an RTPS broadband and compact with low insertion loss (IL) and wide relative phase shifts. The practical challenge is that the circuit must achieve compactness, low IL, and wide bandwidth simultaneously. A magic-T that meets the conditions is designed, combining a ring-shaped T-divider with a microstrip-to-coplanar strips (CPSs) transition. The circumference is a half-guided wavelength, and an IL is less than 1.0 dB in a 100% fractional bandwidth (FBW). Then, an RTPS based on the circuit is designed at 2.0 GHz. The prototype has 46% FBW, where |S-{11}| is less than -10 dB, IL of 1.6± 0.5 dB, and relative phase shifts of 290°.

本文言語英語
ページ(範囲)1810-1821
ページ数12
ジャーナルIEEE Transactions on Microwave Theory and Techniques
72
3
DOI
出版ステータス出版済み - 1 3月 2024
外部発表はい

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