Radial Open Stub and Its Application to a Simple Design of a Four-element Planar Butler Matrix
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概要
- 論文の詳細を見る
This paper describes a radial open stub and its application to a simple design of a four-element planar Butler matrix. In the first stage of our work, we propose a 45-degree phase shifter composed of an eighth-wavelength delay line and a serial connection of a quarter-wavelength straight line and a quarter-wavelength straight open stub. Next, in order to improve relative-phase characteristics between output ports, we propose a 45-degree phase shifter configuration using a quarter-wavelength radial open stub instead of using a quarter-wave-length straight open stub. It is shown by simulation that relative-phase characteristics of the configuration using the radial open stub are better than that using the straight open stub at the high frequencies. Finally, an experimental UHF-band four-element planar Butler matrix is presented. Over the frequency range from 0.83 to 0.92 GHz, the experimental four-element planar Butler matrix exhibits power splits of -6.51±0.29 dB, return losses of greater than 13 dB, errors in the desired relative-phase difference between output ports of less than 2 degrees.
- 社団法人電子情報通信学会の論文
- 2002-05-01
著者
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Hayashi H
Oki Electric Industry Co. Ltd.
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HAYASHI Hitoshi
Massachusetts Institute of Technology (MIT)
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HITKO Donald
Massachusetts Institute of Technology (MIT)
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SODINI Charles
Massachusetts Institute of Technology (MIT)
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Sodini C
Massachusetts Institute Of Technology (mit)
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Hayashi Hitoshi
Ntt Corp. Yokosuka‐shi Jpn
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