Substrate-integrated octave-tunable combline bandstop filter with surface mount varactors

Author

Anand, A. ; Yuhao Liu ; Xiaoguang Liu

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California Davis, Davis, CA, USA

fYear

2014

fDate

24-26 March 2014

Firstpage

1

Lastpage

4

Abstract

This paper presents an octave-tunable two-pole bandstop filter with tuning range of 0.56-1.18 GHz (2.1:1 tuning ratio). The bandstop filter is designed with two highly loaded combline resonators with surface mounted solid state varactors. Theoretical analysis and modeling along with full wave simulation is presented in agreement with measured data. The measured peak attenuation in the stopband is approximately 27 dB at 1.18 GHz and is approximately 7 dB at 0.56 GHz. However, a minimum attenuation of at least 10 dB is maintained above 0.65 GHz (1.82:1 tuning ratio).

Keywords

UHF filters; UHF resonators; band-pass filters; comb filters; resonator filters; substrate integrated waveguides; surface mount technology; varactors; waveguide filters; frequency 0.56 GHz to 1.18 GHz; full wave simulation; highly loaded combline resonators; octave-tunable two-pole bandstop filter; substrate-integrated octave-tunable combline bandstop filter; surface mounted solid state varactors; Apertures; Attenuation; Couplings; Microstrip; Microwave filters; Tuning; Varactors; combline filter; combline resonator; evanescent-mode design; filter design; filters; full-wave simulation; measurement and modeling; modeling; tunable filters; tunable resonators; waveguide filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Symposium (IWS), 2014 IEEE International

Conference_Location

X´ian

Type

conf

DOI

10.1109/IEEE-IWS.2014.6864203

Filename

6864203