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
CN110767962AActive Publication Date: 2020-02-07UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2020-02-07

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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.
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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 β†’TE 11 β†’ HE 11 and TE 01 β†’TM 11 β†’ HE 11 . Compared with the previous conversion sequence, using TM 11...

Claims

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