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Hybrid notch filters
Author(s) -
Rhodes J. D.
Publication year - 1995
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490230105
Subject(s) - band stop filter , bandwidth (computing) , electronic engineering , control theory (sociology) , computer science , topology (electrical circuits) , engineering , low pass filter , electrical engineering , telecommunications , control (management) , artificial intelligence
Narrow bandwidth bandstop filters or ‘notch filters’ are frequently required in both communication and electronic warfare systems. In the latter case the ability to switch into an ‘allpass’ state with a minimum level of loss and time delay distortion is vital. Furthermore, in both cases a level of 20‐30 dB rejection is normally required. These factors suggest that the ‘hybrid notch filter’† proposed in this paper is an optimum solution for low‐loss designs. Design techniques and experimental results for two fixed tuned filters for cellular base station applications are presented.