Title :
Low-frequency location of the leaky-wave poles for a dielectric layer
Author :
Guglielmi, M. ; Jackson, D.R.
Author_Institution :
New Jersey Inst. of Technol., Newark, NJ, USA
fDate :
11/1/1990 12:00:00 AM
Abstract :
Explicit formulas are presented for the value of the complex longitudinal propagation constant β-jα for the higher leaky modes of a dielectric layer in the low-frequency limit. The formulas give values for β and α for both TE and TM modes and for the cases with and without a metal ground-plane backing. In addition to mathematical derivations, numerical comparisons that demonstrate the accuracy of the formulas derived are presented. The expressions derived for the phase and attenuation constants of the leaky waves become increasingly accurate as the frequency is lowered
Keywords :
dielectric materials; dielectric waveguides; guided electromagnetic wave propagation; poles and zeros; LF location; TE modes; TM modes; attenuation constants; complex longitudinal propagation constant; dielectric layer; higher leaky modes; leaky-wave poles; low-frequency limit; metal ground-plane backing; microwave substrates; phase constants; Attenuation; Cutoff frequency; Dielectric substrates; Equations; Microstrip; Millimeter wave propagation; Notice of Violation; Propagation constant; Resonance; Tellurium;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
