Circular waveguide TE11 mode diagnosis method based on high-directivity double-arm coupler

Abstract

The invention belongs to the technical field of circular waveguide mode diagnosis and provides a circular waveguide TE11 mode diagnosis method based on a high-directivity double-arm coupler. A high-power microwave source output port is connected with an input port of a high-directivity double-arm coupler through a circular waveguide rotary joint, and a straight-through output port of the high-directivity coupler is connected with a high-power microwave transmission and radiation system; two groups of high-directivity coupling structures are designed on the side wall of a circular waveguide atan angular interval of 90 degrees, and the circular waveguide rotary joint is matched, so that whether mode components output by a high-power microwave source contain an interference mode TE11 mode ornot can be diagnosed on line, the polarization direction of the mode components is determined, and respective power components of the TM01 mode and the TE11 mode are provided; and a data basis is provided for accurately evaluating the working state of the high-power microwave source.

Description

technical field [0001] The invention belongs to the technical field of circular waveguide mode diagnosis, in particular to a circular waveguide TE 11 mode of diagnosis. Background technique [0002] On-line measurement technology is an important means to detect the output power of high-power microwave sources. Due to factors such as theoretical design, processing, assembly and installation deviations, there will be undesired interference modes when high-power microwave sources generate microwaves, which will affect the efficiency of high-power microwave sources. The output of the high power microwave source is mainly circular waveguide TM 01 mode, there will be interference mode TE when the mode is impure 11 In the past, the online measurement method mainly used the probe-type or porous-type single-arm coupler to detect the TM of the high-power microwave source by extracting a small amount of energy. 01 Mode output power (Reference materials: Broadband circular waveguide...

AI Technical Summary

Problems solved by technology

When there is an interference mode TE at the output of the microwave source 11 When the mode is used, the previous test methods cannot judge the TE output of the microwave source. 11 pattern component size

In order to achieve high-power microwave mode diagnosis, some scholars proposed to use photon imaging technology to install the fluorescent tube in the direction perpendicular to the antenna, and the inner wall of the fluorescent tube is uniformly coated with a thin layer of phosphor powder, and the high-power microwave is irradiated to the fluorescent tube, and the fluorescent tube ionizes and emits light. However, images of the same mode as the microwave source are produced (references: Huang Zhixiong, Yao Jianming, etc. Mode measurement of high-power microwave [J]. Internal Combustion Engines and Power Plants, June 2009, pp.31-33), but this method only Can diagnose the microwave mode category, but cannot give the size of each mode component

Images