Title :
The input impedance of a coaxial line fed probe in a cylindrical waveguide
Author :
Lee, Wilson W S ; Yung, Edward K N
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech., Hong Kong
fDate :
8/1/1994 12:00:00 AM
Abstract :
Dyadic Green´s functions for determining the electric and magnetic fields in a cylindrical waveguide due to a radially directed infinitesimally short electric dipole are derived. The waveguide is shorted at one end and terminated at a perfectly matched load at the other. Both TE and TM modes are considered. Based on these dyadic Green´s functions, the input impedance of a coaxial line fed probe in front of the plunger is derived. The formula is expressed in a closed form. Excellent agreement between theoretical results and experimental data for exciting the TE11 mode in the X band for various probe positions is observed
Keywords :
Green´s function methods; circular waveguides; electric impedance; probes; waveguide theory; TE modes; TE11 mode; TM modes; X band; coaxial line fed probe; cylindrical waveguide; dyadic Green´s functions; electric fields; input impedance; magnetic fields; radially directed electric dipole; Algebra; Coaxial components; Dielectric losses; Impedance; Magnetic fields; Partial differential equations; Probes; Rectangular waveguides; Surface waves; Tellurium;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
