DocumentCode :
923834
Title :
Narrow-Band Stripline or Microstrip Filters with Transmission Zeros at Real and Imaginary Frequencies
Author :
Jokela, Kari T.
Volume :
28
Issue :
6
fYear :
1980
fDate :
6/1/1980 12:00:00 AM
Firstpage :
542
Lastpage :
547
Abstract :
Simple approximate design equations are derived in this paper for an even degree (n ≥ 6) low-pass inverter capacitance prototype filter having single transmission zeros at both real and imaginary frecuencies. This is achieved by utilizing one or two additional couplings. The transmission zeros improve considerably the passband group delay and increase the skirt selectivity compared to those of the ordinary Chebyshev prototype. An exact and more complicated method based on the known generalized Chebyshev rational function approximation is also presented for the comparison. The prototype with one additional coupling is utilized to realize narrow-bandpass printed circuit filters consisting of half-wave resonators.
Keywords :
Chebyshev approximation; Equations; Filtering theory; Frequency; Function approximation; Inverters; Microstrip filters; Narrowband; Prototypes; Stripline;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.1980.1130116
Filename :
1130116
Link To Document :
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