Title :
Spectral analysis considerations relevant to leaky modes of open-boundary waveguides
Author :
Grimm, J.M. ; Yuan, Y. ; Nyquist, D.P.
Author_Institution :
Dept. of Electr. Eng., Michigan State Univ., East Lansing, MI, USA
Abstract :
The behavior of significant features in the transverse spectral plane for the Sommerfeld-type integrals associated with the open-boundary waveguiding systems is investigated, particularly for the microstrip transmission line in a planar layered background environment. The locations of the integration contour and branch points are chosen to be consistent with continuous physical transitions between operating regimes. The rationale for choosing branch cuts in the transverse spectral plane is given. Pole singularities arising from the layered background surround are then obtained in a manner consistent with the cutting of the transverse spectral plane. Trajectories of the poles and branch points are presented for typical leaky modes.<>
Keywords :
integral equations; poles and zeros; strip lines; waveguide theory; EFIE; Sommerfeld-type integrals; branch cuts; electric field integral equation; integration contour; leaky modes; microstrip transmission line; open-boundary waveguides; planar layered background; pole singularities; pole trajectories; spectral analysis; spectral domain; transverse spectral plane; Integral equations; Microstrip components; Optical films; Planar transmission lines; Planar waveguides; Reflection; Spectral analysis; Surface waves; Transmission line theory; Waveguide components;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.174979
