[1] Cao Aijun, Yang Hongsheng, Qian Zhifang,. Study on mutual impedance characteristicsbetween probes in a circular waveguide [J]. Journal of Southeast University (English Edition), 2003, 19 (1): 12-16. [doi:10.3969/j.issn.1003-7985.2003.01.004]

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Study on mutual impedance characteristicsbetween probes in a circular waveguide()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

19

Issue:

2003 1

Page:

12-16

Research Field:

Electromagnetic Field and Microwave Technology

Publishing date:

2003-03-30

Info

Title:

Study on mutual impedance characteristicsbetween probes in a circular waveguide

Author(s):

Cao Aijun;  Yang Hongsheng;  Qian Zhifang

Department of Electronic Engineering, Southeast University, Nanjing 210096, China
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

Keywords:

probe;  mutual impedance;  reaction;  reciprocity theorem

PACS:

TN814+.4

DOI:

10.3969/j.issn.1003-7985.2003.01.004

Abstract:

The expression of mutual impedance between two probes in a circular waveguide is derived by means of a vector potential function, reaction concept and reciprocity theorem. The waveguide is semi-infinite, and one end of the waveguide is terminated to a load with a reflection coefficient. The contribution to the mutual resistance is found to come from the dominant mode, while the contribution to the mutual reactance comes from the dominant mode and the higher order modes. The major contribution to the mutual reactance is from the dominant mode, since the higher modes decay rapidly with the increasing the probes’ of separation distance. However, as the separation distance approaches zero, the higher modes become dominant, which results in a large value of the mutual reactance. The mutual impedance is dependent on the location and height of the probes, their separation distance and the location of the terminal plane.

References:

[1] Collin R E. Field theory of guide waves[M]. New York: McGraw-Hill, 1960. 256-271.
[2] Harrington R F. Time harmonic electromagnetic fields[M]. New York: McGraw-Hill, 1961.340-428.
[3] Lee Wilson W S, Yung Edward K N. The input impedance of a coaxial line fed probe in a cylindrical waveguide[J]. IEEE Trans Microwave Theory Tech, 1994, 42(8):1468-1473.
[4] Deshpande M D, Das B N. The input impedance of a coaxial line to circular waveguide feed [J]. IEEE Trans Microwave Theory Tech, 1977, 25(11):954-957.
[5] Ittipiboon A, Shafal L. Probe mutual impedance in a rectangular waveguide[J]. IEEE Trans Microwave Theory Tech, 1985, 33(4):327-335.
[6] Wang Baisuo. Mutual impedance between probes in a waveguide [J]. IEEE Trans Microwave Theory Tech, 1988, 36(1):53-59.
[7] Wang Baisuo. Mutual impedance between probes in a circular waveguide [J]. IEEE Trans Microwave Theory Tech, 1989, 37(6):1006-1011.

Memo

Memo:

Biographies: The National Natural Science Foundation of China(29776012).
Biographies: Cao Aijun(1977—), male, graduate; Yang Hongsheng(corresponding author), male, professor, hsyang@seu.edu.cn.

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