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Microwave filters with nonperiodic transmission characteristic
Author(s) -
Arndt F.,
Saulich G.
Publication year - 1979
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.4490070110
Subject(s) - stopband , passband , ripple , microwave , elliptic filter , prototype filter , coupling (piping) , filter (signal processing) , microwave transmission , transmission (telecommunications) , electronic engineering , transmission line , topology (electrical circuits) , acoustics , physics , mathematics , low pass filter , band pass filter , computer science , materials science , engineering , electrical engineering , telecommunications , voltage , metallurgy
A microwave filter with nonuniform‐coupled transmission lines is suggested. In contrast to known transmission‐line microwave filters the transmission characteristic does not change periodically with frequency. The synthesis procedure shown reduces the design problem to the known synthesis of directional couplers with nonuniform coupling factor. A table of calculated coupling factor values of the microwave filter with an equi‐ripple passband of 0.05 dB up to 1 dB and an equi‐ripple stopband of 60 dB is given. A practical design example shows good agreement with theoretical results.