Field Patterns in Double Circular-Groove Guide by Finite Element Method

Authors: Lu, Mai¹; Leonard, Paul J.²; Fan, Duo-Wang³

Source: International Journal of Infrared and Millimeter Waves, Volume 26, Number 5, May 2005 , pp. 739-749(11)

Publisher: Springer

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Abstract:

The electromagnetic power coupling in symmetrical and asymmetrical double circular-groove guides have been analyzed by finite element method (FEM) in this paper. The electrical field patterns of the dominant mode and the first higher-order TE mode have been presented. The electromagnetic field of the dominant mode distributes with a concentration in the two grooves and the region between grooves as well for symmetrical double circular-groove guide, while it distributes with a concentration in the groove with larger radius for the asymmetrical double circular-groove guide. The electrical field patterns of the first higher-order TE mode in symmetrical and asymmetrical double circular-groove guide are also presented. The figures in this paper have important values in design of circular-groove guide power coupler for millimeter wave applications.

Keywords: Double circular-groove guide; Power coupler; Field pattern; Finite element method

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10762-005-4982-9

Affiliations: 1: Key Laboratory of Opto-Electronic Technology and Intelligent Control (Lanzhou Jiaotong University), Ministry of Education, P.O. Box 73, 118 West Anning Road, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, People’s Republic of China, Email: mai.lu@126.com 2: Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, UK, 3: Key Laboratory of Opto-Electronic Technology and Intelligent Control (Lanzhou Jiaotong University), Ministry of Education, P.O. Box 73, 118 West Anning Road, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, People’s Republic of China,

Publication date: 2005-05-01