
TY  - JOUR
A1  - Wilhelm, HE 
A1  - DuBow, JB 
A1  - Singh, P 
T1  - Theory of Coaxial Wave Guides with Dielectric and Magnetic Discontinuities
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1981
VL  - 34
IS  - 2
SP  - 207
EP  - 222
KW  - 
UR  - https://doi.org/10.1071/PH810207 
N2  - Analytical solutions are derived for the electromagnetic E, Hand T waves in coaxial wave guides of inner radius a and outer radius b and of infinite length, which are filled in the direction of propagation z with media of different electric permittivity 8 and magnetic permeabilityjz such that: 8 = 8b Il = III for - CIJ ~ Z < - d; 8 = 82, Il = 112 for - d < z < +d; 8 = 83, Il = 113 for +d < z ~ + CIJ. The power reflection and transmission coefficients of the E, Hand T waves are given as a function of frequency Q) and the guide parameters 81, Ill, a, band d. It is shown that the reflection and transmission coefficients exhibit a periodic fine structure in the frequency space above the 'cutoff frequency as a result of the spatial eigenvalue nature of the field solutions. The theory presented provides analytical foundations for the measurement of the frequency-dependent electric permittivity and magnetic permeability of samples in coaxial wave guides. 
ER  -

