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A Numerical Analysis Method for Passive Intermodulation of Microwave Components Based on Finite Difference Time Domain

A technology of finite difference in time domain and microwave components, applied in electrical digital data processing, special data processing applications, instruments, etc., to achieve accurate current density, improve simulation accuracy and calculation efficiency, and achieve accurate calculation results

Active Publication Date: 2018-05-01
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

This type of method does not start from the physical process of passive intermodulation and directly evolve and calculate the passive intermodulation products, but obtains the relationship between low-order passive intermodulation and high-order passive intermodulation by fitting test data. Transfer relationship, a method of indirectly obtaining high-order passive intermodulation products using the test results of low-order passive intermodulation products, and is not a numerical analysis method

Method used

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  • A Numerical Analysis Method for Passive Intermodulation of Microwave Components Based on Finite Difference Time Domain
  • A Numerical Analysis Method for Passive Intermodulation of Microwave Components Based on Finite Difference Time Domain
  • A Numerical Analysis Method for Passive Intermodulation of Microwave Components Based on Finite Difference Time Domain

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specific Embodiment

[0071] (1) The microwave component analyzed is a waveguide flange connection junction, such as figure 2 As shown, the power transmission direction is the z direction, the broad side of the waveguide is the x direction, and the short side is the y direction. The surface material of the component is silver, the input carrier is dual carrier, the frequency is 11.21GHz and 11.895GHz respectively, the input power is two channels of 60W, and the applied torque of the screw is 40Ncm. The calculated contact pressure at the metal contact of the waveguide is 5MPa.

[0072] (2) Divide the microwave components into spatial grid units according to the preset spatial grid division step size, and solve Maxwell’s equations in the time-domain linear differential form on each spatial grid unit to obtain each spatial grid unit electric and magnetic fields on

[0073] (3) Introduce the metal contact nonlinear model on the spatial grid of the metal contact of the microwave component, calculate t...

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Abstract

The present invention discloses a time domain finite difference based microwave part passive inter-modulation numerical analysis method, and discloses a method for introducing a micro-morphology and contact-state metallic contact nonlinear model of a metallic contact part of a microwave part. By adopting the method, the electromagnetic field analysis of a microwave part taking metallic contact non-linearity into consideration is realized, the electromagnetic field of an output port of a microwave part not taking metallic contact non-linearity into consideration is computed by adopting a time domain finite difference method and two signals are subjected to time domain cancellation, so that the interference of errors in numerical computation is reduced, a passive inter-modulation small signal is highlighted, a computation result of a passive inter-modulation product of the microwave part is more accurate, and the difficult problem that the passive inter-modulation of the microwave part is short of a numerical analysis means is solved.

Description

technical field [0001] The invention relates to a numerical analysis method for passive intermodulation of microwave components based on time-domain finite difference, which can accurately numerically analyze passive intermodulation products of microwave components, and is mainly aimed at high-power microwave components carried by space vehicles, which belong to special space effects technology field. Background technique [0002] The passive intermodulation effect is one of the outstanding problems that must be considered when studying spaceborne high-power microwave systems. With the development of modern communication systems in the direction of high power, wide bandwidth and high sensitivity, the impact of passive intermodulation on system performance will become more and more serious, and may even paralyze the entire system. Propose and implement an effective analysis and evaluation method, which can quickly and effectively evaluate the passive intermodulation risk of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 王瑞崔万照白春江王新波李军张娜张剑锋
Owner XIAN INSTITUE OF SPACE RADIO TECH
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