TY - GEN
T1 - Wideband PCB-to-Connectors Impedance Adapters for Liquid Crystal-based Low-loss Phase Shifters
AU - Li, Jinfeng
N1 - Publisher Copyright:
© 2021 EuMA.
PY - 2021/1/12
Y1 - 2021/1/12
N2 - This paper presents the design, optimisation and experimental verification of a wideband impedance adapting network for a liquid crystal (LC) based electronically-tuned phase shifter device including connectors operating up to 67GHz. In contrast with conventional frequency-domain methods based on cross-sectional study assuming an infinitely long transmission line, a time-domain reflectometry (TDR) method is proposed in this work to quantify the transient impedance, and optimise the electrically-short PCB transition part between 1.85mm coaxial connectors and the tunable LC part packaged in an enclosed coplanar waveguide. The fabricated device exhibits a return loss lower than -15dB from 20MHz up to 67GHz, and a maximum insertion loss less than -5.6dB for a differential phase shift of 180°, which delivers a wideband low-loss solution for states-of-the-arts in LC-based phase shifter devices with connectors.
AB - This paper presents the design, optimisation and experimental verification of a wideband impedance adapting network for a liquid crystal (LC) based electronically-tuned phase shifter device including connectors operating up to 67GHz. In contrast with conventional frequency-domain methods based on cross-sectional study assuming an infinitely long transmission line, a time-domain reflectometry (TDR) method is proposed in this work to quantify the transient impedance, and optimise the electrically-short PCB transition part between 1.85mm coaxial connectors and the tunable LC part packaged in an enclosed coplanar waveguide. The fabricated device exhibits a return loss lower than -15dB from 20MHz up to 67GHz, and a maximum insertion loss less than -5.6dB for a differential phase shift of 180°, which delivers a wideband low-loss solution for states-of-the-arts in LC-based phase shifter devices with connectors.
KW - impedance matching
KW - liquid crystals
KW - millimetre wave devices
KW - phase shifters
KW - time-domain reflectometry
UR - http://www.scopus.com/inward/record.url?scp=85099450302&partnerID=8YFLogxK
U2 - 10.23919/EuMC48046.2021.9337967
DO - 10.23919/EuMC48046.2021.9337967
M3 - Conference contribution
AN - SCOPUS:85099450302
T3 - 2020 50th European Microwave Conference, EuMC 2020
SP - 546
EP - 549
BT - 2020 50th European Microwave Conference, EuMC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 50th European Microwave Conference, EuMC 2020
Y2 - 12 January 2021 through 14 January 2021
ER -