A compact high-power microwave TM01-TE01 mode converter

In circular waveguides, the TE01 mode has the lowest transmission loss, which is very suitable for long-distance transmission of high-power microwaves (HPMs). The output mode of HPM sources is mainly the TM01 mode; however, there are few research studies on mode converters of TM01-TE01. In this pape...

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Bibliographic Details
Published in:Review of scientific instruments 2021-09, Vol.92 (9), p.094703-094703
Main Authors: Hu, Yong-jun, Xu, Liang, Zhang, Qiang, Yuan, Cheng-wei, Liu, Jin-liang, Sun, Yun-fei
Format: Article
Language:English
Subjects:
Circular waveguides
Converters
Efficiency
High power microwaves
Rectangular waveguides
Scientific apparatus & instruments
Transmission efficiency
Transmission loss
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Summary:In circular waveguides, the TE01 mode has the lowest transmission loss, which is very suitable for long-distance transmission of high-power microwaves (HPMs). The output mode of HPM sources is mainly the TM01 mode; however, there are few research studies on mode converters of TM01-TE01. In this paper, a high efficiency HPM TM01-TE01 mode converter is designed; compared with the traditional TM01-TE01 mode converters, the structure of the mode converter is compact and easier to process. It is mainly composed of an input circular waveguide, a tapered rectangular waveguide, a 90° bent rectangular waveguide, and an output circular waveguide. A prototype with a center frequency of 2.4 GHz is fabricated and HPM experiments are carried out. The transmission efficiency of this device reaches 99.8% in the simulation, and the measured transmission efficiency is more than 98%. Additionally, the measured power handling capacity is more than 1 GW, which is consistent with simulation. This design has important reference significance for the design of long-distance power transmission devices and HPM mode converters.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0054494