On a class of low-reflection transmission-line quasi-Gaussian low-pass filters and their lumped-element approximations

Gaussian-like filters are frequently used in digital signal transmission. Usually, these filters are made of lumped inductors and capacitors. In the stopband, these filters exhibit a high reflection, which can create unwanted signal interference. To prevent that, a new low-reflection ladder network...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2003-07, Vol.51 (7), p.1871-1877
Main Authors: Djordjevic, A.R., Zajic, A.G., Stekovic, A.S., Nikolic, M.M., Maricevic, Z.A., Schemmann, M.F.C.
Format: Article
Language:English
Subjects:
Capacitors
Digital filters
Gaussian processes
Inductors
Interference
Low pass filters
Mathematical models
Microwaves
Network synthesis
Networks
Reflection
Resistors
Transmission lines
Tuning
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Summary:Gaussian-like filters are frequently used in digital signal transmission. Usually, these filters are made of lumped inductors and capacitors. In the stopband, these filters exhibit a high reflection, which can create unwanted signal interference. To prevent that, a new low-reflection ladder network is introduced that consist of resistors, inductors, and capacitors. The network models fictitious transmission lines with Gaussian-like amplitude characteristics. Starting from the analysis of this network, a procedure is developed for synthesis of a new class of lumped-element RLC filters. These filters have transmission coefficients similar to the classical Bessel filters. In contrast to the Bessel filters, the new filters exhibit a low reflection both in the stopband and passband, they have a small span of element parameters, and they are easy for manufacturing and tuning.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2003.814310