High-Efficiency, Broadband Converter From A Rectangular Waveguide TE10 Mode to A Circular Waveguide TM01 Mode for Overmoded Device Measurement

Xinhong Cui; Gang Wang; Tingyong Jiang; Hao Shao; Jun Sun; Xiaolong Wu; Xianchen Bai; Xiaowei Zhang; Zhiqiang Zhang

doi:10.1109/ACCESS.2018.2815530

IEEE Access (Jan 2018)

High-Efficiency, Broadband Converter From A Rectangular Waveguide TE10 Mode to A Circular Waveguide TM01 Mode for Overmoded Device Measurement

Xinhong Cui,
Gang Wang,
Tingyong Jiang,
Hao Shao,
Jun Sun,
Xiaolong Wu,
Xianchen Bai,
Xiaowei Zhang,
Zhiqiang Zhang

Affiliations

Xinhong Cui: ORCiD; Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
Gang Wang: Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
Tingyong Jiang: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Hao Shao: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Jun Sun: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Xiaolong Wu: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Xianchen Bai: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Xiaowei Zhang: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China
Zhiqiang Zhang: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, China

DOI: https://doi.org/10.1109/ACCESS.2018.2815530
Journal volume & issue: Vol. 6
pp. 14996 – 15003

Abstract

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To accurately measure the performance of overmoded devices used in high-power microwave systems, a novel structure that effectively converts the TE10 mode in a rectangular waveguide to a high-purity TM01 mode in a circular waveguide is proposed. The circular TM01 mode is excited by a hybrid rectangular E-T waveguide structure, which uses a circular waveguide as the E element. Convex slots loaded at the rectangular waveguide, axially symmetric about the cylindrical waveguide, are introduced to suppress the competing lower order TE11 mode. A tuning stub loaded at the rectangular short wall is used to increase the frequency tuning range. The scattering matrix technique was used to study the mode converter along with the microwave network analysis method using some generalizations of the input port reflection and conversion efficiency, which were verified by the numerical full-wave simulation. Based on the theoretical analysis, an X-band TM01 mode generator is designed and measured. Low-power tests show that, when the length of the tuner increases from 5.7 to 11.7 mm, a wide frequency tuning range of ~500 MHz is obtained with a conversion efficiency of ~99%. Measured results and the theoretical analysis are in good agreement.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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