Method for extracting equivalent circuit parameter of dual-frequency-band frequency selective surface

A technology of frequency selective surface and equivalent circuit, applied in the field of metamaterials

Active Publication Date: 2015-11-18
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for extracting equivalent circuit parameters of a dual-band frequency-selective surface, to solve the limitations of existing methods for extracting equivalent circuit parameters, and to realize fast and accurate extraction of equivalent circuit parameters in a wider frequency band extract

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  • Method for extracting equivalent circuit parameter of dual-frequency-band frequency selective surface
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  • Method for extracting equivalent circuit parameter of dual-frequency-band frequency selective surface

Examples

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Embodiment 1

[0048] Embodiment 1: Extraction of equivalent circuit parameters of a dual-band band-pass frequency selective surface.

[0049] refer to figure 1 , the implementation steps of this example are as follows:

[0050] Step 1, transform the scattering matrix S(ω) of the dual-band bandpass frequency selective surface.

[0051] At each operating angular frequency ω, the scattering matrix of the dual-band bandpass frequency selective surface S ( ω ) = S 11 ( ω ) S 12 ( ω ) ...

Embodiment 2

[0113] Embodiment 2: Extraction of equivalent circuit parameters of a dual-band band-stop frequency selective surface.

[0114] refer to figure 1 , the implementation steps of this example are as follows:

[0115] Step 1, converting the scattering matrix S'(ω') of the dual-band band-stop frequency selective surface.

[0116] At each operating angular frequency ω′, the scattering matrix of the dual-band band-stop frequency selective surface S ′ ( ω ′ ) = S 11 ′ ( ω ′ ) S 12 ...

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Abstract

The invention discloses a method for extracting an equivalent circuit parameter of a dual-frequency-band frequency selective surface, and mainly solves the boundedness problem in the prior art that an empirical formula is depended to extract the equivalent circuit parameter. The method comprises the following implementation steps: 1) converting a scattering matrix of the frequency selective surface into a transmission matrix; 2) obtaining an admittance matrix and an impedance matrix of an equivalent circuit through the transmission matrix; 3) expressing the admittance matrix and the impedance matrix by lumped elements in the equivalent circuit; and 4) adopting a curve fitting optimization algorithm to extract the parameter in the equivalent circuit. The method can extract the equivalent circuit parameter of any dual-frequency-band frequency selective surface, improves the precision of the equivalent circuit parameter of the dual-frequency-band frequency selective surface and can be used for quickly and accurately analyzing the characteristics of the dual-frequency-band frequency selective surface.

Description

technical field [0001] The invention belongs to the technical field of metamaterials, in particular to a method for extracting equivalent circuit parameters of a dual-band frequency-selective surface, which can be used to quickly analyze the characteristics of the frequency-selective surface. Background technique [0002] Frequency selective surface FSS is an infinite planar structure composed of the same patch or aperture unit arranged in two-dimensional periodicity. It has frequency selective characteristics for electromagnetic waves with different operating frequencies, polarization states and incident angles. Therefore, in the electromagnetic field It has been widely used, especially in the fields of electromagnetic stealth, electromagnetic compatibility, communication, and electronic countermeasures. [0003] The main difference between different frequency selective surfaces is that the constituent units are divided into two types: patch type and aperture type. It does ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 李龙马芳寇娜刘海霞史琰翟会清
Owner XIDIAN UNIV
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