TY - GEN
T1 - Quasi-Reflectionless Differential Phase Shifter with Arbitrary Prescribed Group Delay and Flat Phase Difference
AU - Chaudhary, Girdhari
AU - Lee, Daehan
AU - Chaudary, Muhammad A.
AU - Jeong, Yongchae
N1 - Publisher Copyright:
© 2022 European Microwave Association.
PY - 2021
Y1 - 2021
N2 - This paper presents a design of a quasi-reflectionless differential phase shifter, which can provide arbitrarily prescribed group delay (GD) and flat phase difference. The proposed quasi-reflectionless differential phase shifter consists of quarter-wavelength coupled lines and series resistor-connected open-circuited half-wavelength stubs in the main and references branches. Closed-form design equations are derived to achieve arbitrary prescribed flat phase difference and GD. For flat phase difference within passband, the GD of the main and reference branches must be the same. In addition, the GD and phase difference flatness in passband are controlled by a series-connected resistor. For experimental validation, a microstrip line 90° quasi-reflectionless differential phase shifter with GD of 1.90 ns at a center frequency of 3.50 GHz is designed and fabricated. The measurement results are well agreed with simulation and theoretical predicted results.
AB - This paper presents a design of a quasi-reflectionless differential phase shifter, which can provide arbitrarily prescribed group delay (GD) and flat phase difference. The proposed quasi-reflectionless differential phase shifter consists of quarter-wavelength coupled lines and series resistor-connected open-circuited half-wavelength stubs in the main and references branches. Closed-form design equations are derived to achieve arbitrary prescribed flat phase difference and GD. For flat phase difference within passband, the GD of the main and reference branches must be the same. In addition, the GD and phase difference flatness in passband are controlled by a series-connected resistor. For experimental validation, a microstrip line 90° quasi-reflectionless differential phase shifter with GD of 1.90 ns at a center frequency of 3.50 GHz is designed and fabricated. The measurement results are well agreed with simulation and theoretical predicted results.
KW - Arbitrary group delay
KW - differential phase shifter
KW - microstrip line
KW - quasi-reflectionless
UR - https://www.scopus.com/pages/publications/85132976235
U2 - 10.23919/EuMC50147.2022.9783615
DO - 10.23919/EuMC50147.2022.9783615
M3 - Conference contribution
AN - SCOPUS:85132976235
T3 - 2021 51st European Microwave Conference, EuMC 2021
SP - 22
EP - 25
BT - 2021 51st European Microwave Conference, EuMC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 51st European Microwave Conference, EuMC 2021
Y2 - 4 April 2022 through 6 April 2022
ER -