A novel reconfigurable bandpass filter using varactor-tuned stepped-impedance-stubs

Author

Min Ou ; Yuhang He ; Liguo Sun

Author_Institution

Dept. of Electron. Eng. & Inf. Sci., Univ. of Sci. & Technol. of China, Hefei, China

Volume

02

fYear

2013

fDate

23-25 Oct. 2013

Firstpage

754

Lastpage

756

Abstract

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 short-circuited 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.

Keywords

band-pass filters; microwave filters; resonator filters; varactors; DC voltage; novel reconfigurable bandpass filter; open-circuited stub; short-circuited stub; transmission zeros; varactor capacitors; varactor-tuned SIR; varactor-tuned stepped impedance resonator; Band-pass filters; Bandwidth; Capacitance; Filtering theory; Microwave filters; Resonator filters; Varactors;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on

Conference_Location

Nanjing

Print_ISBN

978-7-5641-4279-7

Type

conf

Filename

6717588