Accession Number : AD0690373

Title :   SCATTERING MATRIX ANALYSIS OF LOSSY SYMMETRICAL THREE-PORT NETWORKS,

Corporate Author : RESEARCH INST OF NATIONAL DEFENCE STOCKHOLM (SWEDEN)

Personal Author(s) : Hagelin,Sven

Report Date : 1969

Pagination or Media Count : 13

Abstract : The properties of three-port networks have been widely discussed in connection with circulator development. However, little attention has been paid to the influence of loss on network properties. The purpose of this paper is to analyze the power absorption in a lossy symmetrical three-port network and examine how its scattering coefficients are related. The power absorption is first expressed as a function of the coefficients in the dissipation matrix. Its dependence on the input signals is described, and the results are verified by a simple experiment. The theoretical limits of the dissipation coefficients are derived using the condition for conservation of energy. The relation between the moduli of two of the scattering coefficients is a biquadratic equation, which has been solved numerically on a computer. The results are presented in several diagrams showing the realizable combinations of scattering coefficients for various states of loss. Special consideration is given to networks with circulator properties. (Author)

Descriptors :   (*WAVEGUIDE CIRCULATORS, ATTENUATION), SCATTERING, ELECTROMAGNETIC WAVE REFLECTIONS, MATRICES(MATHEMATICS), CIRCUITS, SWEDEN

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE