volume | PIER Journals

2019-10-16

The Calibration of the Coupling Coefficients of the Mode-Selective Coupler Without the Single Mode Exciter

Ling-Na Yue,

Dr. Ling-Na Yue

College of Physical Electronics

University of Electronic Science and Technology of China

China

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Wen-Xiang Wang,

Dr. Wen-Xiang Wang

School of Physical Electronics

University of Electronic Science and Technology of China

China

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Jin Xu,

Dr. Jin Xu

College of Physical Electronics

University of Electronic Science and Technology of China

China

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Hai-Rong Yin,

Dr. Hai-Rong Yin

School of Physical Electronics

University of Electronic Science and Technology of China

China

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Guoqing Zhao,

Dr. Guoqing Zhao

National Key Laboratory of Science and Technology on Vacuum Electronics

University of Electronic Science and Technology of China

China

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Yan-Yu Wei

Prof. Yan-Yu Wei

School of Physical Electronics

University of Electronic Science and Technology of China

China

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Progress In Electromagnetics Research Letters, Vol. 87, 115-121, 2019

doi:10.2528/PIERL19051506

Abstract

As one of the important means in discriminating every mode in a high power microwave (HPM) multimode system, utilizing a mode-selective directional coupler to quantitatively analyze multi-modes and power measurement has been proposed. The first step of this method is to calibrate the coupling coefficients of each coupled mode in the HPM system. Moreover, the conventional calibrating method must make the corresponding single mode exciter or mode generator. In this manuscript, a different calibrating method is presented by measuring the output power from each output port of two back-to-back identical mode-selective couplers, including the backward wave power, then the coupling coefficients of each coupled mode can be calculated by combining and solving equations. In this way, it is not necessary to manufacture the single mode exciter or mode generator for each mode in the HPM system, and also to repeat iteration solution; therefore, this method is more precise, convenient, efficient, and has lower cost than the current other methods.

Citation

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Ling-Na Yue, Wen-Xiang Wang, Jin Xu, Hai-Rong Yin, Guoqing Zhao, and Yan-Yu Wei, "The Calibration of the Coupling Coefficients of the Mode-Selective Coupler Without the Single Mode Exciter," Progress In Electromagnetics Research Letters, Vol. 87, 115-121, 2019.
doi:10.2528/PIERL19051506

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