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Title: Numerical analysis of sleeve monopole in parallel-plate waveguide
Authors: Chen, Z.N. 
Hirasawa, K.
Wu, K.
Keywords: Broadband design
Eigenmode expansion method
Parallel-plate waveguide
Sleeve monopole
Wave-guide transition
Issue Date: Mar-2001
Citation: Chen, Z.N., Hirasawa, K., Wu, K. (2001-03). Numerical analysis of sleeve monopole in parallel-plate waveguide. International Journal of RF and Microwave Computer-Aided Engineering 11 (2) : 86-98. ScholarBank@NUS Repository.
Abstract: A monopole with double sleeves, which consists of a resonant loading and a conventional sleeve monopole, is experimentally investigated. The loaded monopole is put vertically in a parallel-plate waveguide and driven by a coaxial feeder. The new structure exhibits a remarkably broad impedance bandwidth. In this paper, a modal expansion technique is used to numerically evaluate the impedance characteristics of the monopole by modeling the fields between the plates using cylindrical harmonic functions. A Fourier least-square integration is applied to finding the expansion coefficients by the boundary and continuity conditions. Prior to modeling the proposed sleeve monopole, the developed analysis scheme is examined for its convergence and accuracy. Calculated results are validated by the measurements. For the optimum design at 5.8 Ghz, we investigate the effects of the structure parameters on the impedance characteristics.
Source Title: International Journal of RF and Microwave Computer-Aided Engineering
ISSN: 10964290
DOI: 10.1002/mmce.1004
Appears in Collections:Staff Publications

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