Summary
International Symposium on Antennas and Propagation
2013
Session Number:TP-P
Session:
Number:TP-P-8
A Novel Reconfigurable Bandpass Filter Using Varactor-Tuned Stepped-Impedance-Stubs
Min Ou, Yuhang He, Liguo Sun,
pp.-
Publication Date:2013/10/22
Online ISSN:2188-5079
Summary:
A novel reconfigurable bandpass filter using varactor-tuned stepped impedance resonator (SIR) is introduced to achieve tunable central frequency and bandwidth. The varactor-tuned stepped impedance resonator structure consists of a stepped impedance with open or shortcircuited stub and a varactor between the stubs. It’s convenient to change the transmission zeros with the appropriate DC voltage controlling the values of varactor capacitors. In addition, the ratios between the two sections of SIRs can be easily changed to reformulate the resonant frequencies and then more design freedom of filter is obtained. The experimental results validate the design.