A 360° Miniaturized and Low-Loss Liquid Crystal Phase Shifter Based on Slow Waves

Using a slow wave (SW) and liquid crystal (LC) inverted microstrip structure, a tiny phase shifter is designed in this research. The liquid crystal phase-shifter is proposed as a three-periodic structure with a strong slow-wave effect, which significantly reduces the length of the phase-shifting mic...

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Published in2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP) Vol. 1; pp. 1 - 2
Main Authors Du, Daming, Gao, Chuang, Zhang, ShangXian, Li, JinHui, Quan, HongYang, Zhang, SiSi, Liang, Hao, Sun, YiLing, Qian, ZhengFang, Zhu, Hua
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.11.2023
Subjects
Dielectric constant
Impedance matching
Insertion loss
liquid crystal material
phase shifter
Phase shifters
Power transmission lines
Propagation losses
Simulation
Slow wave structures
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Summary:Using a slow wave (SW) and liquid crystal (LC) inverted microstrip structure, a tiny phase shifter is designed in this research. The liquid crystal phase-shifter is proposed as a three-periodic structure with a strong slow-wave effect, which significantly reduces the length of the phase-shifting microstrip line necessary for 360° phase shift. At a physical size of one wavelength, this phase shifter can achieve 360° of continuous phase modification. Gradient structures and Defected Ground Structures (GDS) are used to introduce impedance matching, and the phase shifter's insertion loss during continuous phase adjustment is only -1.1 dB.
DOI:10.1109/APCAP59480.2023.10470332