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Reactance loading array construction method based on port characteristic mode theory

A construction method and eigenmode technology, applied to specific array feeding systems, antenna arrays, gene models, etc., to achieve the effects of improving optimization efficiency, saving computing resources and time consumption, and simplifying optimization design

Pending Publication Date: 2021-01-22
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The current reactance loading control array mainly uses the weight coefficient as the optimization variable, and can only be optimized for a single frequency point

Method used

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  • Reactance loading array construction method based on port characteristic mode theory
  • Reactance loading array construction method based on port characteristic mode theory
  • Reactance loading array construction method based on port characteristic mode theory

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Experimental program
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Embodiment

[0043]In this embodiment, a method for constructing a reactance loading array based on port eigenmode theory specifically includes the following steps:

[0044] The first step is to analyze the characteristics of the array antenna using the port eigenmode theory. The steps are as follows:

[0045] (1) Read geometric information and control parameters such as frequency and port number;

[0046] (2) extracting the port impedance matrix;

[0047] (3) Establish the generalized eigenvalue equation by the impedance matrix, and solve the generalized eigenvalue equation;

[0048] (4) Calculate the characteristic current and characteristic field;

[0049] In the third step, in order to constrain the radiation performance of the antenna array in a certain direction, the objective function can be set as follows:

[0050] F=w 1 f 1 +w 2 f 2 +w 3 f 3 +w 4 f 4 +w 5 f 5 (1)

[0051]

[0052] f 2 =-max(Gain) (3)

[0053]

[0054]

[0055]

[0056] where F is the t...

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Abstract

The invention discloses a reactance loading array construction method based on a port characteristic mode theory. The method comprises the following steps: obtaining an array port impedance matrix ofan antenna structure by utilizing full-wave simulation, establishing a characteristic value equation by the impedance matrix, solving to obtain a characteristic current and a characteristic value, andfurther obtaining a characteristic electric field; representing the port current and the total electric field directional diagram by linearly superposing the characteristic current and the characteristic electric field, and setting a plurality of target functions for the port current and the total electric field directional diagram; and optimizing the reactance value by using a differential evolution algorithm: reversely deducing a weight coefficient required by linear superposition of the characteristic current and the characteristic electric field by using the reactance value in each iteration so as to judge whether the current reactance value meets the requirements of a target function or not, and obtaining an optimal reactance value for port loading after a termination condition is met. According to the invention, the reactance value is directly used as the optimization parameter, so that the optimization design of the reactance loading array is simpler and more convenient, computing resources and time consumption are saved, and the target function can adapt to diversified design requirements.

Description

technical field [0001] The invention belongs to the technical field of antenna radiation performance optimization design, in particular to a reactance loading array construction method based on port eigenmode theory. Background technique [0002] The wireless communication technology is constantly developing, and the antenna is a necessary part of the communication system. Since the increase of many antenna indicators makes the design of the antenna complicated, it has always been a challenging problem to optimally design the radiation performance antenna that meets the requirements. Antenna optimization often relies on the scanning of structural parameters. When the antenna structure is complex, optimization needs to consume a lot of computing resources and time. Therefore, a reactive loading array based on port eigenmode theory is introduced. [0003] Reactance loading control array means that in an array, only one array element is connected to the feed port, and other ar...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06N3/12H01Q21/00G06F111/06
CPCG06F30/27G06N3/126H01Q21/0006H01Q21/00G06F2111/06
Inventor 陶诗飞孙通叶晓东王昊许梦南刘思行陈玲
Owner NANJING UNIV OF SCI & TECH