BST-varactor tunable dual-mode filter using variable Z transmission line
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
- Heriot-Watt University
Ferroelectric materials like Barium-Strontium-Titanate (BST) have become attractive for microwave tunable circuit applications. This letter presents an investigation of BST-varactor tunable dual-mode filter using variable characteristic impedance or Z transmission line. The interdigital BST varactors are fabricated and modeled, which are then deployed to realize a bandpass filter with tunable bandwidth capability. The use of tunable impedance line provides additional flexibilities in the design of microwave tunable circuits. A tunable bandpass filter of this type with a center frequency of 1.8 GHz and a bandwidth tuning ratio of 1.15:1 is demonstrated experimentally.
|Number of pages||3|
|Journal||IEEE Microwave and Wireless Components Letters|
|Publication status||Published - 1 Mar 2008|