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Circular waveguide TM11 mode exciter

A TM11, mode excitation technology, applied in the direction of waveguide devices, electrical components, circuits, etc., can solve the problems of long conversion link, large overall link error, and difficulty in compact application, and achieve small transmission loss, compact structure, The effect of simple structure

Active Publication Date: 2020-02-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For existing TM 11 The conversion link of the mode converter is long, compact application is difficult, and the overall error of the link is relatively large. The present invention proposes a new type of circular waveguide TM 11 pattern exciter

Method used

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  • Circular waveguide TM11 mode exciter
  • Circular waveguide TM11 mode exciter
  • Circular waveguide TM11 mode exciter

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Embodiment Construction

[0029] Below with the accompanying drawings, the Ka-band circular waveguide TM 11 The mode exciter is taken as an example to describe the specific implementation manner of the present invention.

[0030] Such as figure 1 As shown, an all-metal structure Ka-band circular waveguideTM 11For the mode exciter, in order to ensure its structural strength, hard aluminum alloy is selected as its processing material. The mode exciter is composed of a power division structure 1 , a coupling excitation structure 2 and an output structure 3 , and is connected to a circular waveguide transmission link through a waveguide flange 4 .

[0031] Such as figure 2 As shown, the power division structure 1 is a one-to-two power divider based on a rectangular waveguide, which is composed of a group of symmetrically arranged metal cover plates. The inner cavity between the metal covers forms a rectangular waveguide waveguide structure, including a rectangular waveguide E-plane T-junction, a gradu...

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Abstract

The invention discloses a mode exciter of a circular waveguide TM11 mode, and belongs to the technical field of high-power millimeter wave testing. The mode exciter comprises a power dividing structure, a coupling excitation structure and an output structure. After passing through the power dividing structure, a TE10 mode is divided into two groups of TE10 modes which are equal in amplitude and have a phase difference of 180 degrees and then reaches a coupling end. At the coupling end, the two groups of rectangular waveguide TE10 modes are efficiently coupled into ridge gap waveguides by two coupling probes of the coupling excitation structure respectively and converted into two groups of ridge gap waveguide quasi-TEM modes which are equal in amplitude and have a phase difference of 180 degrees, the two groups of ridge gap waveguide quasi-TEM modes are respectively transmitted to two excitation probes by the ridge gap waveguides, and a group of TEM waves with equal amplitude and opposite phases is excited at an excitation end of the output structure through the excitation probes. The group of TEM waves are subjected to vector synthesis to form a circular waveguide TM11 mode, and the circular waveguide TM11 mode is output to a circular waveguide transmission link through an output port. The mode exciter can generate a circular waveguide TM11 mode in a broadband, the mode purityis high, the transmission loss is small, the structure is compact, and system integration is facilitated.

Description

technical field [0001] The invention belongs to the technical field of high-power millimeter wave testing, in particular, relates to a method for generating a circular waveguide TM 11 Pattern exciter for pattern. Background technique [0002] The cyclotron traveling wave tube has the characteristics of high gain, wide frequency band and high power, and has a very broad application prospect in the fields of imaging radar, millimeter wave communication system, electronic countermeasures and microwave weapons. Common working mode of gyrotron traveling wave tube TE 01 The mode is not suitable as a feed radiation mode directly and needs to be converted into a Gaussian beam. Currently, it is commonly used to realize circular waveguide TE 01 Mode-oriented Gaussian beam or Gaussian-like field HE 11 The mode change sequence of the mode has the following two methods: TE 01 →TE 11 → HE 11 and TE 01 →TM 11 → HE 11 . Compared with the previous conversion sequence, using TM 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/163
CPCH01P1/163
Inventor 吴泽威王敏行蒲友雷蒋伟罗勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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