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

Volume

42

Issue

8

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

1468

Lastpage

1473

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.297808

Filename

297808