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Exponentially tapered nonuniform transmission lines for high‐pass filter design
Author(s) -
Toscano A.,
Vegni L.,
Urbani F.
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199711)16:4<227::aid-mop9>3.0.co;2-n
Subject(s) - tapering , transmission line , exponential function , filter (signal processing) , low pass filter , transmission coefficient , mathematics , mathematical analysis , transmission (telecommunications) , exponential growth , electric power transmission , microwave , control theory (sociology) , electronic engineering , engineering , telecommunications , electrical engineering , computer science , computer graphics (images) , control (management) , artificial intelligence
The telegraph equations of a nonuniform transmission line (NUTL) can be solved by means of the hypergeometric confluent functions apart from the tapering factor. The solution that we find is the most general possible, and can be particularized to the exponential case to show how an exponentially tapered nonuniform transmission line (ETNUTL) can be treated as a high‐pass filter. It is shown that the exponential profile improves the performance of the filter, and the normalized transmission coefficient is given for different values of the tapering factor. Moreover, we find a lumped equivalent circuit for the filter whose elements are dependent on the tapering factor. The high‐pass characteristics of an ETNUTL are verified with techniques in the frequency domain. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 16: 227–229, 1997.