Accession Number : AD0734967
Title : Periodic and Log Periodic Coupling of Modes of Propagation.
Descriptive Note : Technical rept.,
Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Personal Author(s) : Knorr,Jeffrey B.
Report Date : AUG 1971
Pagination or Media Count : 30
Abstract : The report summarizes an investigation of the applicability of the log periodic concept to coupled microwave transmission lines. It is shown that active coupling at a given frequency may be achieved between two lines supporting waves with different phase constants provided they are coupled periodically with a periodicity determined by the difference B(2)-B(1) at that frequency. Since B(2)-B(1) will, in general, vary with frequency, coupling over a broad frequency range requires a variable period. This may be realized by scaling the structure period, thereby giving rise to a log periodic mode coupler. This technique appears to hold promise for achieving the same wideband performance that has been attained with log periodic radiators. (Author)
Descriptors : (*WAVEGUIDE COUPLERS, TRANSMISSION LINES), MICROWAVE EQUIPMENT, PROPAGATION, PHASE SHIFT, INTERACTIONS, THESES
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE