CUED Publications database

High figure-of-merit compact phase shifters based on liquid crystal material for 1-10GHz applications

Cai, L and Xu, H and Li, J and Chu, D (2017) High figure-of-merit compact phase shifters based on liquid crystal material for 1-10GHz applications. Japanese Journal of Applied Physics, 56. ISSN 0021-4922

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Abstract

© 2017 The Japan Society of Applied Physics. A liquid crystal (LC) based tunable microstrip line (ML) phase shifter featuring high performance is presented. The experimental results show an electrically tunable differential phase up to 360° at 10GHz with an overall insertion loss < 8.5 dB. The device possesses a high figure-of-merit (FoM) of 64°/dB at 9.8GHz and 60°/dB between 7-10GHz. This is achieved by simultaneously considering both of the LC tuned phase and overall loss in the design. The proposed device utilizes the inverted meander ML technology to minimize its size. Taking into account the real fabrication procedure, a novel impedance matching structure is applied, and the measured return loss is considerably improved. The FoM and phase tuning property of the fabricated device as optimized are compared with the state-of-Art results published recently and show better performance for both of them.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:19
Last Modified: 14 Nov 2017 02:21
DOI: