An impedance matched phase shifter using BaSrTiO/sub 3/ thin film |
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| Authors: | Qingduan Meng Xueqiang Zhang Fei Li Jiandong Huang Xiaohong Zhu Dongning Zheng Bolin Cheng Qiang Luo Changzhi Gu Yusheng He |
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| Affiliation: | Inst. of Phys. & Beijing Nat. Lab. for Condensed Matter Phys., Chinese Acad. of Sci., Beijing, China; |
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| Abstract: | We present a distributed phase shifter with an equal ripple return loss at its operation frequency range. The phase shifter is based on a periodic structure and consists of a coplanar waveguide (CPW) line periodically loaded with voltage-variable barium strontium titanate (BST) interdigitated capacitors. Measurements show that its return loss is better than -15dB at frequencies from direct current to 16GHz, and at 9.4GHz, its phase shift is 41/spl deg/ under 120-V applied bias voltage. |
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