Non-ideal metal surface displacement current calculating method based on square-wave model

Abstract

The invention belongs to the technical field of electromagnetic transmission, specifically on a non-ideal metal surface, and specifically relates to a non-ideal metal surface displacement current calculating method based on a square-wave model. The non-ideal metal surface displacement current calculating method based on the square-wave model comprises the following steps: 1) determining morphology error information of the non-ideal metal surface; 2) establishing a non-ideal metal surface morphology error model; 3) connecting a current source at the two ends of the non-ideal metal surface; 4) calculating equivalent capacitance value between two adjacent wave peaks; 5) calculating equivalent resistance value between the two adjacent wave peaks; 6) calculating voltage value between the two adjacent wave peaks; and 7) calculating displacement current value on the non-ideal metal surface.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic transmission, in particular to a non-ideal metal surface, and in particular to a method for calculating the displacement current of a non-ideal metal surface based on a square wave model. Background technique [0002] The surface topography of the electronic equipment structure is one of the important technical performance indicators to measure the overall quality level of the electronic equipment. It not only directly affects the structural rigidity of the electronic equipment, but also affects the surface-to-face efficiency of the electronic equipment, the main lobe width and auxiliary flap level. [0003] In view of the current level of processing and manufacturing technology, the metal surface cannot be absolutely smooth, and there will be small-scale surface roughness. The surface of the equipment structure is a typical non-ideal metal surface. [0004] At present, most of the resea...

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Problems solved by technology

However, the above-mentioned theory is based on the geoelectric model, and the working frequency is 10MHz, which is far lower than the working frequency of high-frequency electronic equipment. Therefore, there is a problem in directly applying the high-frequency electromagnetic method to the calculation of the surface displacement current of electronic equipment. Inappropriate

The basic calculation idea of ​​the high-frequency electromagnetic method is that the normalized electromagnetic response is obtained by subtracting the normalized total magnetic field from the primary field in free space. Although this equivalent calculation method can obtain the influence effect of the displacement current on the electromagnetic field , but the displacement current value cannot be obtained directly

Because it cannot be directly applied to the correction of the existing electromagnetic transmission theory

Third, the theoretical basis of the high-frequency electromagnetic method is the statistical method. Although the statistical method can be applied, it has not been combined with the actual working conditions of the electronic equipment. Because the structural surface errors of the electronic equipment in the actual working conditions include random errors and systematic errors, The generation mechanism, distribution form and influence mechanism of the two kinds of errors on electrical performance are not the same

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