Title :
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
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;
Conference_Titel :
Wireless Symposium (IWS), 2014 IEEE International
Conference_Location :
X´ian
DOI :
10.1109/IEEE-IWS.2014.6864203
