4.5 Article

A compact high-power microwave TM01-TE01 mode converter

期刊

REVIEW OF SCIENTIFIC INSTRUMENTS
卷 92, 期 9, 页码 -

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AIP Publishing
DOI: 10.1063/5.0054494

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A high efficiency HPM TM01-TE01 mode converter is designed in this paper, with a compact and easy-to-process structure, achieving good transmission efficiency and power handling capacity in experiments.
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 & DEG; 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.

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