TY - GEN
T1 - 180-Degree Branch Line Coupler Composed of Two Types of Iris-Loaded Waveguides
AU - Yukawa, Hidenori
AU - Ushijima, Yu
AU - Yuasa, Takeshi
AU - Yoneda, Naofumi
AU - Miyazaki, Moriyasu
N1 - Publisher Copyright:
© 2018 European Microwave Association.
PY - 2018/11/20
Y1 - 2018/11/20
N2 - 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. Optimal electrical lengths enable to achieve 180-degree output phase difference without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. We designed a proposed coupler in K-band. The size of the proposed coupler is almost same as the usual 90-degree branch line coupler. So the proposed coupler presents an advantage of compactness, in comparison with the conventional 180-degree coupler with additional phase shifters. The design results demonstrated a return loss of 22dB, an isolation of 25dB, a coupling response of 3dB+/-0.1dB, phase differences of 0deg+5/-1deg and 180deg+5/-1deg with a bandwidth of 8% in the K-band.
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. Optimal electrical lengths enable to achieve 180-degree output phase difference without additional phase shifters. The two main lines with different electrical lengths are realized by capacitive and inductive iris-loaded waveguides. We designed a proposed coupler in K-band. The size of the proposed coupler is almost same as the usual 90-degree branch line coupler. So the proposed coupler presents an advantage of compactness, in comparison with the conventional 180-degree coupler with additional phase shifters. The design results demonstrated a return loss of 22dB, an isolation of 25dB, a coupling response of 3dB+/-0.1dB, phase differences of 0deg+5/-1deg and 180deg+5/-1deg with a bandwidth of 8% in the K-band.
KW - branch line
KW - coupler
KW - iris-loaded
KW - phase shifters
KW - waveguide
UR - http://www.scopus.com/inward/record.url?scp=85059824649&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059824649&partnerID=8YFLogxK
U2 - 10.23919/EuMC.2018.8541588
DO - 10.23919/EuMC.2018.8541588
M3 - Conference contribution
AN - SCOPUS:85059824649
T3 - 2018 48th European Microwave Conference, EuMC 2018
SP - 691
EP - 694
BT - 2018 48th European Microwave Conference, EuMC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 48th European Microwave Conference, EuMC 2018
Y2 - 25 September 2018 through 27 September 2018
ER -