Improved Ferroelectric Phase Shifter by Inserting Spiral Inductors into Ground
In this paper, a method is introduced to improve the performance of ferroelectric phase shifter. The influences of periodically inserting spiral inductor into ground of coplanar waveguide (CPW) are investigated. Three dimensional electro-magnetic simulation shows that at frequency of
25 GHz, the maximal phase differential will be 449°, which is 97° more than the conventional one with no spiral inductor loaded. The novel ferroelectric phase shifter is also fabricated. Comparing with the conventional phase shifter, additional 49° phase shift is obtained at 18
GHz.
Keywords: Coplanar waveguide; Ferroelectric; Phase shifter; Spiral inductor; Thin film
Document Type: Research Article
Affiliations: State Key Laboratory of Electronic Thin Film and Integrated Devices,University of Electronics Science and Technology of China, ChengduSichuan610054, P. R. China
Publication date: 01 January 2011
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