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Improvement method of diffraction Gaussian beam analysis algorithm

A Gaussian beam and algorithm technology, applied in electromagnetic field characteristics, electrostatic field measurement and other directions, can solve problems such as inability to analyze, limited approximation of actual field distribution energy, and inability to analyze the field distribution of quasi-optical network systems, to expand application scenarios, improve Practical application value, accurate effect of field value

Inactive Publication Date: 2009-09-23
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0015] It can be seen that in the analysis process of the DGBA algorithm, the subsequent steps need to be analyzed and calculated based on the field distribution of the traditional feed source in step 1. It can be seen that the above-mentioned Gaussian approximation is used to approximate the feed field distribution as Analytical method, because the analytical formula has limited energy approximation to the actual field distribution, thus limiting the analysis accuracy of the quasi-optical network system; and, for the field distribution of the traditional feed that cannot be approximated by the analytical formula, or for the The field distribution after the signal conditioning device existing between the two reflecting mirrors cannot be analyzed by using the above-mentioned Gaussian beam to approximate the feed field distribution as an analytical formula, so it is impossible to analyze the quasi-optical network system in the above two cases
In short, the existing method of expressing the field distribution as an analytical formula through Gaussian approximation cannot accurately analyze the field distribution in quasi-optical network systems

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  • Improvement method of diffraction Gaussian beam analysis algorithm
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  • Improvement method of diffraction Gaussian beam analysis algorithm

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Embodiment 1

[0125] figure 1 Shown is a first embodiment of the DGBA algorithm applying the improved method of the present invention. In this example, a single mirror is used to analyze the field distribution of a conventional feed. The reflective mirror used in this embodiment is an example of an ellipsoidal mirror, such as Figure 5 As shown, it is a part intercepted from the surface of the ellipsoid by using the light column. The diameter D of the light column is 107.2 mm. The light on the axis of the incident light column is the center of the incident light. light. The expression for the ellipsoid is x 2 ( 209.302 ) 2 + y 2 + z 2 ( 104.511 ...

Embodiment 2

[0150] The second embodiment of the present invention is used to illustrate the situation where there is a signal conditioning device between the two reflecting surfaces, as described above image 3 Take the biased Cassegrain antenna shown as an example, the schematic diagram is as follows image 3 As shown, a dichromator is inserted between the two mirrors. Its specific structure and size are as Figure 7 As shown, the traditional feed distance is located between the first mirror surface and the second mirror surface, and the distances from the first mirror surface and the second mirror surface are 1 m and 3.5 m, respectively. In the horizontal direction, the distance between the first mirror surface and the focal point of the second mirror surface is 3m. The origin of the novel feeding source of the present invention is located at the incident focal point of the first reflecting mirror. After being reflected by the second reflecting mirror, the outgoing light exits horizo...

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Abstract

The invention discloses an improvement method of a diffraction Gaussian beam analysis (DGBA) algorithm and an analysis method of field distribution in a quasi-optical network system. A plane is designed between a device for emitting radiation field and a reflecting mirror as a novel feed source; a discrete field value of the novel feed source is obtained by field sampling on the plane; the field value of a sampling point is obtained by measurement or simulation calculation; and the existing feed source field analytic expression of Gaussian approximate representation is replaced by the novel feed source discrete field in the DGBA algorithm. The improved filed distribution analysis method and the DGBA algorithm adopting the filed distribution analysis method are applicable to analysis of any field distribution in the quasi-optical network system and comprises field distribution of the traditional feed source or field distribution of signal regulating devices passing between the two reflecting mirrors, thus expanding the application scenes of the DGBA algorithm, being more accurate of the field value obtained by measurement and improving the practical application value of the DGBA algorithm.

Description

technical field [0001] The invention relates to millimeter wave and submillimeter wave quasi-optical technology, in particular to an improved method for a diffraction Gaussian beam analysis algorithm. Background technique [0002] At present, millimeter-wave and submillimeter-wave quasi-optical technologies are widely used in the fields of earth exploration, atmospheric exploration, maritime satellites, and radio astronomy. A large number of radiation systems are used in the detection systems of millimeter-wave and submillimeter-wave quasi-optical technologies in various fields. These radiation systems are usually composed of multiple quasi-optical devices, which can usually be called quasi-optical network systems. [0003] In quasi-optical network analysis, in order to simulate and analyze the performance of the entire system, it is necessary to analyze and track the field distribution after each quasi-optical device. Since the feed source is at the beginning of the quasi-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08G01R29/14
Inventor 刘小明俞俊生陈晓东刘绍华王宇锋徐亮苏汉生魏钦刚麦源汪玮
Owner BEIJING UNIV OF POSTS & TELECOMM