Reduced Branch-Line Coupler Using Radial Stubs

Yanna HAO; Iwata SAKAGAMI; Akihiro TOKUNOU

Reduced Branch-Line Coupler Using Radial Stubs

Yanna HAO, Iwata SAKAGAMI, Akihiro TOKUNOU

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This study proposes a 3 dB branch-line coupler using radial stubs to achieve reduced coupler size and simplified stub arrangement. As the electrical lengths of stubs used here are less than 90at center frequency, a method of comparing input impedances to obtain radial stubs that are equivalent to straight stubs is discussed. The frequency characteristics of the proposed coupler are derived by combining classical transmission line theory with the computed data of radial stub input impedances. The methods presented here increase possibilities for realizing reduced branch-line couplers by means of stub design. Experimental results agree well with theoretical results except for slight differences in the high frequency region.

Publication: IEICE TRANSACTIONS on Electronics Vol.E87-C No.9 pp.1615-1620

Publication Date: 2004/09/01

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Type of Manuscript: PAPER

Category: Microwaves, Millimeter-Waves

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Yanna HAO, Iwata SAKAGAMI, Akihiro TOKUNOU, "Reduced Branch-Line Coupler Using Radial Stubs" in IEICE TRANSACTIONS on Electronics, vol. E87-C, no. 9, pp. 1615-1620, September 2004, doi: .
Abstract: This study proposes a 3 dB branch-line coupler using radial stubs to achieve reduced coupler size and simplified stub arrangement. As the electrical lengths of stubs used here are less than 90at center frequency, a method of comparing input impedances to obtain radial stubs that are equivalent to straight stubs is discussed. The frequency characteristics of the proposed coupler are derived by combining classical transmission line theory with the computed data of radial stub input impedances. The methods presented here increase possibilities for realizing reduced branch-line couplers by means of stub design. Experimental results agree well with theoretical results except for slight differences in the high frequency region.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e87-c_9_1615/_p

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@ARTICLE{e87-c_9_1615,
author={Yanna HAO, Iwata SAKAGAMI, Akihiro TOKUNOU, },
journal={IEICE TRANSACTIONS on Electronics},
title={Reduced Branch-Line Coupler Using Radial Stubs},
year={2004},
volume={E87-C},
number={9},
pages={1615-1620},
abstract={This study proposes a 3 dB branch-line coupler using radial stubs to achieve reduced coupler size and simplified stub arrangement. As the electrical lengths of stubs used here are less than 90at center frequency, a method of comparing input impedances to obtain radial stubs that are equivalent to straight stubs is discussed. The frequency characteristics of the proposed coupler are derived by combining classical transmission line theory with the computed data of radial stub input impedances. The methods presented here increase possibilities for realizing reduced branch-line couplers by means of stub design. Experimental results agree well with theoretical results except for slight differences in the high frequency region.},
keywords={},
doi={},
ISSN={},
month={September},}

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TY - JOUR
TI - Reduced Branch-Line Coupler Using Radial Stubs
T2 - IEICE TRANSACTIONS on Electronics
SP - 1615
EP - 1620
AU - Yanna HAO
AU - Iwata SAKAGAMI
AU - Akihiro TOKUNOU
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E87-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2004
AB - This study proposes a 3 dB branch-line coupler using radial stubs to achieve reduced coupler size and simplified stub arrangement. As the electrical lengths of stubs used here are less than 90at center frequency, a method of comparing input impedances to obtain radial stubs that are equivalent to straight stubs is discussed. The frequency characteristics of the proposed coupler are derived by combining classical transmission line theory with the computed data of radial stub input impedances. The methods presented here increase possibilities for realizing reduced branch-line couplers by means of stub design. Experimental results agree well with theoretical results except for slight differences in the high frequency region.
ER -