Analysis method of antenna radiation and scattering characteristics based on characteristic mode theory
A technology of scattering characteristics and antenna radiation, applied in the field of antennas, it can solve the problems of increased calculation time, the influence of port mode, the inability to know the contribution of port excitation, and the inability of port excitation to be taken into account. Effect
Active Publication Date: 2020-02-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] Most of the existing analysis methods based on eigenmode theory use this theory as a design reference. When analyzing antenna performance, it still needs to be calculated with the help of full-wave simulation. The two processes are performed separately, which increases the total calculation time. Moreover, these The analysis method usually cannot take the port excitation into account, and the influence of the port on the mode and the contribution of the port excitation to each mode cannot be known.
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[0056] The implementation of the present application will be described in detail below with reference to the drawings and examples, so as to fully understand and implement the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects.
[0057] Such as figure 1 As shown, the detailed steps of the analysis of antenna radiation and scattering characteristics based on eigenmode theory are as follows:
[0058] Step 1: For the antenna whose radiation and scattering characteristics are to be analyzed, establish a surface integral equation that characterizes the relationship between the antenna source and field, use the RWG triangular basis function to discretize the surface current and magnetic current of the antenna, and obtain the impedance matrix [Z mn ] N×N , N represents the number of unknowns of the discretized surface integral equation, and the element Z in the matrix mn Indicates that the sampling of...
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The invention discloses an antenna radiation and scattering characteristic analysis method based on a characteristic mode theory. The method comprises the following implementation steps: solving an impedance matrix according to a moment method; calculating a feature model according to a feature model analysis method; calculating an excitation vector according to the analysis problem type; the magnetic current coefficient is expanded by a feature mode, and a new matrix equation about a feature mode weighting coefficient is established; solving an approximate solution of an original moment method matrix equation solution according to the mode weighting coefficient and the feature model; and calculating radiation and scattering related parameters according to the solved electromagnetic current coefficient. The combination of characteristic mode analysis and antenna radiation and scattering characteristic analysis is realized, and the solving speed can be increased; the characteristic modeexpansion method of antenna radiation and scattering under port excitation is realized, guidance can be provided for subsequent antenna design, and the design process is accelerated.
Description
technical field [0001] The invention belongs to the technical field of antennas, and relates to an analysis method of antenna radiation characteristics and scattering characteristics, specifically a method for analyzing antenna radiation and scattering performance based on eigenmode theory by using eigenmodes. It can be used to quickly analyze antenna radiation and scattering characteristics, design antennas with specific performance, and speed up the antenna design process. Background technique [0002] Modern antenna design relies on electromagnetic field numerical calculation methods, including the finite element method (FEM), finite difference time domain method (FDTD) and method of moments (MOM), to analyze the performance of the antenna, which can be obtained quickly and accurately The radiation and scattering performance of the antenna, and the application area is very wide. Although these methods can obtain accurate solutions to the corresponding electromagnetic pro...
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Inventor 陈益凯邓轩杨仕文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA