A Fast Algorithm for Predicting the Resonance Point Frequency of Open Cavity
A fast algorithm and resonance point technology, applied in computing, special data processing applications, instruments, etc., can solve the problems of multi-computer memory, long computing time, fast prediction of electromagnetic resonance point frequency and other problems, and achieve high practicability, computing fast effect
Inactive Publication Date: 2017-12-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although the simulation software can accurately predict the frequency of the electromagnetic resonance point, it requires a long calculation time and more computer memory, which is often not suitable for quickly predicting the frequency of the electromagnetic resonance point
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] Theoretical basis of the present invention:
[0040] For closed cavities, the formula can be used Get its cavity resonance point frequency. When there are perturbations inside the cavity, the frequency of the resonance point will shift. Using the perturbation principle, the expression of the offset frequency can be obtained as:
[0041]
[0042] In the formula, f 0 is the resonance point frequency of the cavity, f is the resonance point frequency when there is a perturbation inside the cavity; V 0 is the cavity volume, ΔV is the volume of the perturbation object; and are the electric and magnetic fields at the location of the perturbation, respectively.
[0043] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0044] A fast algorithm for predicting the resonant point frequency of an open cavity. The opening on the surface of the cavity is equivalent to embedding a perturbation i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fast algorithm for predicting the frequency of the resonant point of an apertured cavity. The aperture on the surface of the cavity is equivalent to embedding a perturbation inside the cavity. According to the offset when the perturbation exists inside the cavity Frequency and the frequency of the resonance point of the closed cavity to calculate the frequency of the electromagnetic resonance point of the open cavity; specifically include the following steps: S1, determine the calculation parameters of the open hole model; S2, select the mode of the electromagnetic resonance point, and determine the perturbation Size; S3, calculate the electric field and magnetic field at the perturbation; S4, calculate the offset frequency when there is a perturbation inside the cavity according to the data obtained in step S3; S5, calculate the closed cavity according to the calculation parameters determined in step S1 Resonance point frequency; S6. Calculate the electromagnetic resonance point frequency of the open cavity according to the offset frequency and the resonance point frequency of the closed cavity. The invention can accurately calculate the frequency of the resonance point of the cavity with holes, and the calculation speed is fast without occupying a large amount of computer memory.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic compatibility of electronic equipment, and in particular relates to a fast algorithm for predicting the resonance point frequency of an apertured cavity. Background technique [0002] When the electromagnetic resonance phenomenon occurs, the electromagnetic field distribution inside the cavity can be equivalent to a distribution in the form of a standing wave. The electromagnetic field energy carried by this standing wave is very large, which leads to a sharp decrease in the ability of the cavity structure to shield electromagnetic radiation. In actual production, in order to make electronic equipment have a higher ability to shield electromagnetic radiation, we often need to keep it away from the resonance point. Therefore, predicting the frequency of the electromagnetic resonance point becomes a prerequisite for avoiding the resonance point to obtain higher electromagnetic shielding effe...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 杜平安刘恩博罗静雯
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA