
Accession Number : AD0713720
Title : A TUTORIAL EXPOSITION OF THE FUNDAMENTAL NETWORKTHEORETIC IDEAS UNDERLYING MODERN INSERTIONLOSS FILTER DESIGN.
Descriptive Note : Technical rept.,
Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y DEPT OF ELECTROPHYSICS
Personal Author(s) : Youla,Dante C.
Report Date : SEP 1970
Pagination or Media Count : 120
Abstract : From the outset research in Network theory has been propelled forward by the desire to build superior filters incorporating the many practical constraints in a realistic way. The early emergence of the imageparameter method of filter design was quite natural since in concept it was based squarely on a modal picture, so familiar in classical physics. However, despite its uncontested intuitive appeal the imageparameter philosophy has two rather pronounced rawbacks. First, the description of a lumped 2port in terms of irrational functions such as image impedances, propagation constants, etcetera, instead of polynomials, is perhaps unnatural from the point of view of good pedagogy. Second, the terminations demanded by the theory are the image impedances of the filter and not the resistors which must actually be employed in practice. A great deal of effort (and ingenuity) is required to evaluate and equalize this mismatch effect, especially for wideband designs. Nevertheless, it is fair to say that when the technique is applicable it works well and quickly and the treatise by Cauer must be considered definitive. (Author)
Descriptors : (*ELECTRICAL NETWORKS, DESIGN), (*ELECTRIC FILTERS, DESIGN), MATRICES(MATHEMATICS), LOW PASS FILTERS, GAIN, DIFFERENTIAL EQUATIONS, COMPLEX VARIABLES, NUMERICAL INTEGRATION, TRANSFORMATIONS(MATHEMATICS), OPTIMIZATION
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE