Accession Number : AD0654410

Title :   THE IMPEDANCE OF ELLIPTIC WAVEGUIDE (FOR THE H SUB EL MODE),

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Valenzuela,G. R.

Report Date : 11 AUG 1959

Pagination or Media Count : 14

Abstract : The report presents two methods for obtaining the impedances of elliptic waveguide: (1) using the exact theory, and (2) an approximate method using trial fields. In the exact solution the integrals involving Mathieu functions were solved by computer using the Gaussian quadratures method. The exact and the approximate results are plotted for comparison. The expressions giving the approximate impedances are within 6% of the exact values in all cases. The exact cut-off wavelength was obtained from the boundary conditions. Kihara's cut-off wavelength is also compared to the exact wavelength obtained in this study. The approximate wavelength is within 1%. (Author)

Descriptors :   (*WAVEGUIDES, ELECTRICAL IMPEDANCE), ELLIPSOIDS, THEORY, NUMERICAL ANALYSIS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE