We propose a 180-degree branch line coupler composed of two types of iris-loaded waveguides. The proposed coupler consists of two main transmission lines and branch lines with different electrical lengths. Based on optimal electrical lengths, a 180-degree output phase difference can be achieved without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. The size of the proposed coupler is nearly half that of the conventional 180-degree branch line coupler with additional phase shifters. Thus, the proposed coupler is of advantage with respect to the conventional one. We designed a proposed coupler in the K-band for satellite communication systems. The measurement results demonstrate a reflection of -20 dB, isolation of -20 dB, coupling response of -3.1+0.1 dB/-0.1 dB, and phase differences of 0+0.1 deg/-1.4 deg and -180+0.5 deg/-2.3 deg at a bandwidth of 8% in the K-band.
Hidenori YUKAWA
Mitsubishi Electric Corp.
Yu USHIJIMA
Mitsubishi Electric Corp.
Naofumi YONEDA
Mitsubishi Electric Corp.
Moriyasu MIYAZAKI
Mitsubishi Electric Corp.
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Hidenori YUKAWA, Yu USHIJIMA, Naofumi YONEDA, Moriyasu MIYAZAKI, "180-Degree Branch Line Coupler Composed of Two Types of Iris-Loaded Waveguides" in IEICE TRANSACTIONS on Electronics,
vol. E104-C, no. 2, pp. 85-92, February 2021, doi: 10.1587/transele.2020ECP5006.
Abstract: We propose a 180-degree branch line coupler composed of two types of iris-loaded waveguides. The proposed coupler consists of two main transmission lines and branch lines with different electrical lengths. Based on optimal electrical lengths, a 180-degree output phase difference can be achieved without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. The size of the proposed coupler is nearly half that of the conventional 180-degree branch line coupler with additional phase shifters. Thus, the proposed coupler is of advantage with respect to the conventional one. We designed a proposed coupler in the K-band for satellite communication systems. The measurement results demonstrate a reflection of -20 dB, isolation of -20 dB, coupling response of -3.1+0.1 dB/-0.1 dB, and phase differences of 0+0.1 deg/-1.4 deg and -180+0.5 deg/-2.3 deg at a bandwidth of 8% in the K-band.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2020ECP5006/_p
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@ARTICLE{e104-c_2_85,
author={Hidenori YUKAWA, Yu USHIJIMA, Naofumi YONEDA, Moriyasu MIYAZAKI, },
journal={IEICE TRANSACTIONS on Electronics},
title={180-Degree Branch Line Coupler Composed of Two Types of Iris-Loaded Waveguides},
year={2021},
volume={E104-C},
number={2},
pages={85-92},
abstract={We propose a 180-degree branch line coupler composed of two types of iris-loaded waveguides. The proposed coupler consists of two main transmission lines and branch lines with different electrical lengths. Based on optimal electrical lengths, a 180-degree output phase difference can be achieved without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. The size of the proposed coupler is nearly half that of the conventional 180-degree branch line coupler with additional phase shifters. Thus, the proposed coupler is of advantage with respect to the conventional one. We designed a proposed coupler in the K-band for satellite communication systems. The measurement results demonstrate a reflection of -20 dB, isolation of -20 dB, coupling response of -3.1+0.1 dB/-0.1 dB, and phase differences of 0+0.1 deg/-1.4 deg and -180+0.5 deg/-2.3 deg at a bandwidth of 8% in the K-band.},
keywords={},
doi={10.1587/transele.2020ECP5006},
ISSN={1745-1353},
month={February},}
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TY - JOUR
TI - 180-Degree Branch Line Coupler Composed of Two Types of Iris-Loaded Waveguides
T2 - IEICE TRANSACTIONS on Electronics
SP - 85
EP - 92
AU - Hidenori YUKAWA
AU - Yu USHIJIMA
AU - Naofumi YONEDA
AU - Moriyasu MIYAZAKI
PY - 2021
DO - 10.1587/transele.2020ECP5006
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E104-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2021
AB - We propose a 180-degree branch line coupler composed of two types of iris-loaded waveguides. The proposed coupler consists of two main transmission lines and branch lines with different electrical lengths. Based on optimal electrical lengths, a 180-degree output phase difference can be achieved without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. The size of the proposed coupler is nearly half that of the conventional 180-degree branch line coupler with additional phase shifters. Thus, the proposed coupler is of advantage with respect to the conventional one. We designed a proposed coupler in the K-band for satellite communication systems. The measurement results demonstrate a reflection of -20 dB, isolation of -20 dB, coupling response of -3.1+0.1 dB/-0.1 dB, and phase differences of 0+0.1 deg/-1.4 deg and -180+0.5 deg/-2.3 deg at a bandwidth of 8% in the K-band.
ER -