Design and analysis of swapped port coupler and its application in a miniaturized butler matrix

Yae Suk Jeong; Tae Wook Kim

doi:10.1109/TMTT.2010.2041571

Design and analysis of swapped port coupler and its application in a miniaturized butler matrix

Yae Suk Jeong, Tae Wook Kim

Department of Electrical and Electronic Engineering

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

36 Citations (Scopus)

Abstract

This paper presents a novel size reduction technique for designing a Butler matrix using a new type of coupler. This coupler is half the length of a conventional coupler and has a swapped port characteristic wherein the locations of the isolation and coupled ports are switched. These features make the new coupler, called the swapped port coupler, effective for reducing the size of the Butler matrix. The behavior of the swapped port coupler was mathematically analyzed, and its design equation was derived. Furthermore, the proposed coupler was employed to design a miniaturized Butler matrix. The area of this Butler matrix was 70×70 mm², and its operating frequency was 1 GHz. When the area was normalized to the frequency, the area of the proposed Butler matrix was 10% of a conventional Butler matrix.

Original language	English
Article number	5427146
Pages (from-to)	764-770
Number of pages	7
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	58
Issue number	4
DOIs	https://doi.org/10.1109/TMTT.2010.2041571
Publication status	Published - 2010 Apr

Bibliographical note

Funding Information:
Manuscript received June 11, 2009; revised October 11, 2009. First published March 08, 2010; current version published April 14, 2010. This work was supported by the National Research Foundation of Korea (NRF) under Grant 2009-8-1535 funded by the Korea Government.

All Science Journal Classification (ASJC) codes

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2010.2041571

Cite this

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abstract = "This paper presents a novel size reduction technique for designing a Butler matrix using a new type of coupler. This coupler is half the length of a conventional coupler and has a swapped port characteristic wherein the locations of the isolation and coupled ports are switched. These features make the new coupler, called the swapped port coupler, effective for reducing the size of the Butler matrix. The behavior of the swapped port coupler was mathematically analyzed, and its design equation was derived. Furthermore, the proposed coupler was employed to design a miniaturized Butler matrix. The area of this Butler matrix was 70×70 mm2, and its operating frequency was 1 GHz. When the area was normalized to the frequency, the area of the proposed Butler matrix was 10% of a conventional Butler matrix.",

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Design and analysis of swapped port coupler and its application in a miniaturized butler matrix

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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