Title :
A new class of microwave active filters
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
The new active filter concept being presented employs band-limited directional signal channels that are connected in parallel to produce filtering action through controlled interference among respective signal components. Attributes of the technique include a convenient 50-ohm-based building-block-type design procedure, unconditional circuit stability, tolerance for passive circuit element losses, graceful performance degradation in the face of active element parameter changes, and an ability to realize both wideband and extremely narrowband high-Q filter circuits in planar, compact form. The concept is illustrated with an experimental 10-GHz bandpass filter of two percent bandwidth and an experimental 9.75-GHz notch filter of one quarter percent bandwidth.<>
Keywords :
Q-factor; active filters; band-pass filters; hybrid integrated circuits; microstrip components; microwave filters; microwave integrated circuits; notch filters; 10 GHz; 50 ohm; 9.75 GHz; active element parameter changes; band-limited directional signal channels; bandpass filter; building-block-type design procedure; circuit stability; controlled interference; filtering action; high-Q filter circuits; microwave active filters; notch filter; passive circuit element losses; performance degradation; Active filters; Band pass filters; Bandwidth; Circuit stability; Degradation; Filtering; Interference; Microwave filters; Passive circuits; Performance loss;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335495
