Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm

An equivalent circuit and genetic algorithm technology, applied in the field of electromagnetic absorber design

Inactive Publication Date: 2015-07-29
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, there is no design method for square ring array electromagnetic ab

Method used

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  • Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm
  • Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm
  • Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm

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Embodiment 1

[0117] (1) According to the working frequency band f of the absorber 1 ~ f 2 Select the media substrate material. The bandwidth of the absorber is between 2 and 10 GHz, which belongs to the broadband absorber, so the thickness of the dielectric plate needs to be thicker. Based on the consideration of the surface smoothness and total weight of the absorber, a dielectric plate with a slightly higher dielectric constant is selected, and the dielectric constant is 2.65. In addition, from the perspective of bandwidth and total weight, air or foam is selected as the dielectric board, and its dielectric constant is 1.07. Therefore, in this example, the absorber adopts a double-layer dielectric (number of layers n=2), and the dielectric constant and thickness can be determined as: ε 1 =2.65,d 1 = 1.5mm and ε 2 = 1, d 2 =8.5mm, the thicker layer of dielectric is grounded with a metal plate;

[0118] (2) A single-ring or double-ring array is placed between the dielectric base mat...

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Abstract

The invention provides a method for designing a square ring array based absorber rapidly and efficiently, namely, a square ring array equivalent circuit combined genetic algorithm. The method comprises the steps of: firstly introducing two parameters, namely, resistance loss and equivalent dielectric constant on the basis of an equivalent circuit model of a loss-free square ring array so as to obtain a single/double ring array equivalent circuit model and calculation formula of centrally uploaded lumped resistance; then combining with a transmission line theory to finally elicit an equivalent circuit m of an absorber in a multilayered structure; finally, on the basis of the equivalent circuit, optimizing the performance of the structure by adopting a genetic algorithm to form a complete optimized design process. According to the method, the square ring array based multilayered absorber can be designed, a design goal can be defined based on the practical demand, and a broadband low-profile absorber can be designed freely. With adoption of the method for designing the absorber, short time is taken, the error is small, and the efficiency is high.

Description

technical field [0001] The invention belongs to a design method of an electromagnetic absorber, in particular to a design method of a square ring array electromagnetic absorber that combines equivalent circuits and genetic algorithms. Background technique [0002] In the increasingly important stealth and electromagnetic compatibility (EMC) technology, the role and status of electromagnetic wave absorbing materials are very prominent, and have become the magic weapon and secret weapon of electronic countermeasures in modern military. At present, the circuit analog absorber is widely concerned as a structural absorbing material. A common structure in the circuit simulation absorber is composed of a resistive sheet composed of periodic metal strips, grids, and sheets in the absorbing material. [0003] The equivalent circuit can be used to analyze and design the inductance, capacitance and other parameters of the resistor, but it is often difficult to obtain an accurate equiv...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 车文荃韩叶熊瑛常玉梅
Owner NANJING UNIV OF SCI & TECH
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