Multi-mode coupling analysis of a sub-terahertz band planar corrugated Bragg reflector

doi:10.1088/1674-1056/24/11/118403

Abstract Planar Bragg reflector operating in the sub-terahertz wavelength installed at the upstream end of a sheet beam backward wave oscillator (BWO) is very promising to minimize the whole circuit structure and make it more compact. In this paper, a sub-terahertz wavelength (0.18-0.22 THz) tunable planar Bragg reflector is numerically analyzed by using multi-mode coupling theory (MCT). The operating mode TE₁₀ and dominant coupling mode TE₀₁ are mainly considered in this theory. Reflection and transmission performance of the reflector are demonstrated in detail and the results, in excellent agreement with the theoretical analysis and simulation, are also presented in this paper. Self-and cross-coupling coefficients between these two modes are presented as well. The reflector behaviors with different Bragg dimensions are discussed and analyzed in the 0.16-0.22 THz range. The analysis in this paper can be of benefit to the design and fabrication of the whole BWO circuit.

Keywords: planar Bragg reflector multi-mode coupling theory sub-terahertz BWO

Received: 06 May 2015
Revised: 04 July 2015
Accepted manuscript online:

PACS:	84.40.Fe	(Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))
	84.40.Dc	(Microwave circuits)
	84.40.Az	(Waveguides, transmission lines, striplines)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. G0501040161101040).

Corresponding Authors: Liu Guo
E-mail: liuguo.uestc@gmail.com

Cite this article:

Liu Guo (刘国), Luo Yong (罗勇), Wang Jian-Xun (王建勋), Shu Guo-Xiang (舒国响) Multi-mode coupling analysis of a sub-terahertz band planar corrugated Bragg reflector 2015 Chin. Phys. B 24 118403

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Multi-mode coupling analysis of a sub-terahertz band planar corrugated Bragg reflector

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