Title :
An impedance matched phase shifter using BaSrTiO3 thin film
Author :
Meng, Qingduan ; Zhang, Xueqiang ; Li, Fei ; Huang, Jiandong ; Zhu, Xiaohong ; Zheng, Dongning ; Cheng, Bolin ; Luo, Qiang ; Gu, Changzhi ; He, Yusheng
Author_Institution :
Inst. of Phys. & Beijing Nat. Lab. for Condensed Matter Phys., Chinese Acad. of Sci., Beijing, China
fDate :
6/1/2006 12:00:00 AM
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° under 120-V applied bias voltage.
Keywords :
barium compounds; coplanar waveguide components; impedance matching; microwave phase shifters; strontium compounds; thin film devices; 0 to 16 GHz; 120 V; BaSrTiO3; coplanar waveguide; distributed phase shifter; equal ripple return loss; impedance matched phase shifter; interdigitated capacitor; periodic structure; thin film; Barium; Binary search trees; Coplanar waveguides; Frequency; Impedance; Periodic structures; Phase shifters; Strontium; Titanium compounds; Voltage; distributed circuits; phase shifter;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.875622
