A Broadband Circular Waveguide Directional Coupler for Microwave Power Measurement

A technology of directional coupler and microwave power, which is applied in the direction of waveguide devices, circuits, connecting devices, etc., can solve the problems of large measurement errors and affecting the transmission of secondary waveguides, and achieve reduced mutual influence, high isolation, and small fluctuations in coupling degree Effect

Active Publication Date: 2021-03-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, since the high-order mode cannot be transmitted in the standard rectangular waveguide, it will reflect back and forth in the non-standard rectangular sub-waveguide; and the high-order mode (such as TE20) has a high content, which will affect the transmission of the working mode (TE10 mode) in the sub-waveguide, which is easy to cause large measurement error

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  • A Broadband Circular Waveguide Directional Coupler for Microwave Power Measurement
  • A Broadband Circular Waveguide Directional Coupler for Microwave Power Measurement
  • A Broadband Circular Waveguide Directional Coupler for Microwave Power Measurement

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Embodiment Construction

[0037] A kind of broadband circular waveguide directional coupler that is used for microwave power measurement, this directional coupler comprises: overmode circular waveguide (1) (i.e. main waveguide), double-arm secondary waveguide; Said double-arm secondary waveguide includes upper arm secondary waveguide and The lower wall auxiliary waveguide, the upper arm auxiliary waveguide or the lower wall auxiliary waveguide include: a non-standard rectangular waveguide (6), two non-standard over-modulated rectangular E-bend waveguides (2), and an absorption load (3); The modulus rectangular E-bend waveguide is arranged at both ends of the non-standard rectangular waveguide respectively, and is connected with the non-standard rectangular waveguide, and one of the non-standard over-modulated rectangular E-bend waveguides is connected to the absorbing load (3); the non-standard rectangular waveguide of the upper arm auxiliary waveguide The non-standard rectangular waveguides of the wave...

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Abstract

The invention discloses a broadband circular waveguide directional coupler for microwave power measurement, and relates to the technical field of microwave and millimeter wave devices. Compared with the traditional over-mode circular waveguide directional coupler, the invention introduces a new non-standard over-mode rectangular waveguide to replace the standard rectangular waveguide in the traditional over-mode circular waveguide directional coupler. By adjusting the size of the non-standard overmode rectangular waveguide to change the cut-off wavenumber of the fundamental mode TE10 mode, the cutoff wavenumber of the fundamental mode TE10 mode of the non-standard overmode rectangular waveguide is the same as the cutoff wavenumber of the working mode TEmn mode in the overmode circular waveguide , so that the propagation (phase) constant of the TE10 mode at any frequency point is the same as the propagation constant of the working mode TEmn, so that the forward wave of the coupler can satisfy the superposition condition in the same direction at any frequency point, and the extended overmode The purpose of working bandwidth of the circular waveguide directional coupler and reducing the fluctuation of coupling degree in the band.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave devices, in particular to a circular waveguide structure for propagating and measuring high-power microwave and millimeter waves output by high-power microwave and millimeter-wave sources such as cyclotron traveling wave tubes and klystrons. Background technique [0002] The directional coupler is a microwave and millimeter-wave device widely used in the field of microwave and millimeter-wave measurement. Its main function is to accurately sample the high-power signals transmitted in the microwave and millimeter-wave systems, and couple a small part wave signal, in order to perform time-domain envelope monitoring, power measurement and spectrum measurement on the high-power signal transmitted in the system through measuring instruments such as oscilloscopes, small power meters, and spectrum analyzers. [0003] Most traditional high-power microwave systems use rectangular wave...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/18H01P1/26
CPCH01P1/26H01P5/182
Inventor 徐勇李洋孙淼彭廷会王兆栋罗勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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