Title :
Frequency-agile bandstop filter with tunable attenuation
Author :
Jachowski, Douglas R. ; Rauscher, Christen
Author_Institution :
Electron. Sci. & Technol. Div., Naval Res. Lab., Washington, DC, USA
Abstract :
A frequency-agile bandstop filter technology with tunable stopband attenuation and constant absolute bandwidth is described. The technology is demonstrated by a six-resonator planar microstrip filter with simultaneous varactor-diode tuning of stopband attenuation from 30 dB to 50 dB and of operating frequency from 1.8 GHz to 2.2 GHz, with a stopband bandwidth of 60 MHz and absolute 3 dB bandwidth of less than 390 MHz.
Keywords :
band-stop filters; microstrip filters; resonator filters; bandwidth 60 MHz; constant absolute bandwidth; frequency 1.8 GHz to 2.2 GHz; frequency-agile bandstop filter; six-resonator planar microstrip filter; tunable stopband attenuation; varactor-diode tuning; Admittance; Attenuation; Bandwidth; Circuit optimization; Frequency; Microwave filters; Microwave technology; Resonator filters; Tunable circuits and devices; Tuning;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165780
