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Geometry-Dependent Performance of Ferroelectric Coplanar Waveguide Phase Shifters Based on Ba1-xSrxTiO3 Thin Films
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- 발행일
- 200606
- 출처
- Journal of the Korean Physical Society, v.48 no.6, pp.1646-1650
- ISSN
- 0374-4884
- 출판사
- 한국물리학회 (KPS)
- 협약과제
- 04MB5700, 위상 배열 시스템 제어용 강유전체 이상기 MMIC기술, 이수재
- 초록
- To study the geometrical-factor-dependent microwave performance of a coplanar waveguide (CPW) phase shifter based on a (001)-oriented (Ba,Sr)TiO3 (BST) film, we fabricated CPW devices having various gaps and widths. The microwave dielectric properties of BST CPW phase shifter devices were examined by calculating the scattering parameter obtained using a HP 8510C vector network analyzer with a frequency range of 0.5 . 20 GHz at room temperature under dc bias fields of 0 . 40 V. The measured reflection loss and insertion loss at 10 GHz with no dc bias were about .18 .4 dB and .15 .2 dB, respectively, and mainly depended on the impedances of the CPW transmission lines. The measured differential phase shift values were about 30 120 at 10 GHz with a 40-V dc bias variation and depended on the gap size.
- KSP 제안 키워드
- 10 Ghz, Coplanar Waveguide Feeding(CPW), Differential phase shift, Frequency Range, Measured reflection loss, Microwave dielectric properties, Phase Shifter, Room-temperature, Transmission line, dc bias, insertion loss