Title :
A tunable X-band active notch filter with low-distortion passband response
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
The tunable channelized active notch filter presented distinguishes itself through its ability to maintain forward signal flow in its three parallel-connected branches without an amplifier in the one branch that determines passband performance, resulting in extremely low signal distortion and very low noise levels at passband frequencies. The practicability of the new approach has been experimentally verified with a filter whose 40-dB-deep notch tunes, with the help of varactors, from 9.5 to 10.5 GHz.
Keywords :
active filters; circuit tuning; electric distortion; hybrid integrated circuits; microwave filters; microwave integrated circuits; notch filters; varactors; 9.5 to 10.5 GHz; SHF; active notch filter; channelized active notch filter; hybrid MIC; low noise levels; low-distortion passband response; parallel-connected branches; tunable X-band filter; varactors; Active filters; Active noise reduction; Band pass filters; Circuit noise; Distortion; Frequency; Low-noise amplifiers; Passband; Passive filters; Tunable circuits and devices;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.860928
