A waveguide mode excitation method, storage medium and device based on the method of moments
A technology of mode excitation and method of moments, applied in the field of computational electromagnetics, can solve the problems that it is difficult to obtain the transmission mode of the waveguide port, the port mode cannot be automatically switched, and the MOM excitation source port cannot generate a single mode, etc.
Active Publication Date: 2021-09-10
BEIHANG UNIV
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Problems solved by technology
[0003] However, the method of moment method (MOM) in the prior art to analyze the waveguide port excitation antenna model has the following problems: (1) the traditional MOM excitation source port cannot generate a single mode; (2) the traditional MOM excitation source port cannot automatically switch according to the port shape Port mode; (3) Traditional MOM is not easy to obtain waveguide port transmission mode
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[0076] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0077] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed item...
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The invention discloses a waveguide mode excitation method, storage medium and device based on the method of moments. The method includes: extracting the waveguide excitation antenna model, and specifying the waveguide port of the antenna; obtaining the point coordinates corresponding to the grid surface element corresponding to the port and Point connection, identify the geometric shape of the port and obtain the port size; transform the antenna port to the UV plane through vector transformation, and align the center of the local coordinate system with the center of the port; generate a waveguide corresponding to the geometric shape according to the geometric shape The electric field and magnetic field at any point in the port area; calculate the electric field and magnetic field distribution on the vertices of the port grid to obtain the near-field distribution of the mode field, and calculate the far-field radiation pattern to obtain the far-field distribution of the mode field; analyze the mode field to obtain the near-field distribution of the antenna Field distribution and antenna far-field distribution. The present invention does not need to modify the internal matrix unit of the method of moment / multilayer fast multipole, and has the advantage of single and controllable excitation mode compared with methods such as single probe excitation or point source excitation.
Description
technical field [0001] The invention relates to computational electromagnetics, in particular to a waveguide mode excitation method, storage medium and device based on the method of moments. Background technique [0002] Waveguide (WAVEGUIDE), a structure used to guide electromagnetic waves in a direction. In electromagnetics and communications engineering, the term waveguide can refer to any linear structure that transmits electromagnetic waves between its endpoints. The waveguide is the main excitation structure of the antenna, and the most common waveguides include circular waveguides, rectangular waveguides, and coaxial waveguides. The excitation mode of the waveguide is generally wired excitation, port excitation, etc. The Method of Moments (MoM) is a method for discretizing continuous equations into algebraic equations, which is suitable for solving both differential equations and integral equations. [0003] However, the method of moment method (MOM) in the prior a...
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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 李尧尧蔡少雄胡蓉曹成苏东林
Owner BEIHANG UNIV