Method for predicting micro discharge threshold of cavity filter

A cavity filter and micro-discharge technology, which is applied in the direction of instruments, electrical digital data processing, special data processing applications, etc., can solve the problems of consuming simulation time and inability to make automatic judgments, and achieve strong practicability and high engineering application value , wide applicability

Active Publication Date: 2013-02-13
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0007] Pérez and Vicente et al. proposed a method for predicting the microdischarge threshold based on the coaxial transmission line system, and judged the microdischarge by recording the change of the number of electrons in the microwave components with

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  • Method for predicting micro discharge threshold of cavity filter
  • Method for predicting micro discharge threshold of cavity filter
  • Method for predicting micro discharge threshold of cavity filter

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail:

[0034] In this specific embodiment, a low-pass ridge waveguide cavity filter is taken as an example to describe the method for predicting the microdischarge threshold of the cavity filter according to the present invention.

[0035] Using the method of the present invention to predict the micro-discharge threshold of the low-pass ridge waveguide cavity filter, the specific implementation process is as follows:

[0036] A. Set the initial electromagnetic signal input to the low-pass ridge waveguide cavity filter as a time-domain continuous wave signal x(t)=A 0 sin(2πf 0 t), frequency f 0 is 3.9GHz, the input power is P 0 , A 0 with P 0 Correspondingly, set the power scanning range P 1 ~P 2 (P 1 ≤P 0 ≤P 2 ), P 1 50W, P 2 is 1000W, the simulation time T(T≥100 / f 0 ) is 100ns, time step t 0 is 0.00049859815ns, the total time step N t =...

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Abstract

The invention discloses a method for predicting micro discharge threshold of a cavity filter. The method includes determining micro discharge value simulation parameter, building a particle simulation area of the cavity filter, conducting micro discharge value simulation, recording secondary electron transmission changing with time in the micro discharge value simulation process, conducting value processing and conducting automatic scanning and prediction on micro discharge threshold power. A micro discharge value simulation and threshold power judgment method of the cavity filter is designed by utilizing the particle simulation technology and combining secondary electron transmitting characteristics of metal materials on the basis of a geometrical model and a particle simulation area of the cavity filter. The method achieves accurate value analysis and prediction of the micro discharge threshold of the cavity filter, greatly shortens development period, saves expensive micro discharge experiment cost and is very suitable for prediction of the micro discharge threshold of the cavity filter with a complex structure and micro discharge design of a large power microwave part.

Description

technical field [0001] The invention relates to the application field of space special effects, in particular to a numerical simulation method for predicting the micro-discharge threshold of a cavity filter. Background technique [0002] Microdischarge is a special spatial effect generated by secondary electron emission in microwave devices in a vacuum environment. When microdischarge occurs, it will bring defects such as increased noise floor and signal deterioration, and even cause permanent damage to microwave devices. In order to eliminate the hidden danger of micro-discharge at the beginning of component design and improve the reliability and service life of microwave components, it is necessary to predict the micro-discharge threshold of microwave components and avoid them. [0003] Especially for the cavity filter, due to the complex electromagnetic field distribution, the simple approximate equivalent cannot predict its micro-discharge threshold. At present, the pr...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李韵王新波崔万照
Owner XIAN INSTITUE OF SPACE RADIO TECH
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