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Frequency selector

A frequency selection and combination technology, applied in the direction of electrical components, circuits, resonators, etc., to achieve the effect of suppressing back radiation and reducing damage

Inactive Publication Date: 2006-08-30
李宏强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in many occasions, the frequency selection device is required to have the same resonant frequency for electromagnetic waves polarized in two directions, so this H-pattern frequency selection device cannot be used in these occasions.

Method used

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Figure 2A and Figure 2B is a schematic diagram showing the pattern of the first embodiment of the frequency selection device of the present invention. The frequency selection device of the first embodiment of the present invention is composed of a metal layer and a dielectric layer, and the metal layer contains one or more periodically arranged units, each unit contains a pattern composed of one or more continuous lines, the One or more continuous lines are composed of their respective end-to-end polyline segments, and the angle between any two connected line segments in the polyline segment is 90 degrees; among the polyline segments constituting any continuous line, for any A line segment, the two line segments connected to this line segment are located on the same side of the line segment; when starting from the starting point and running along any...

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Abstract

This invention relates to a frequency selecting device including a metallic layer and a medium layer, in which, said metallic layer is placed at the surface of the medium layer and composed of one or multiple periodic arranged units, each one includes a pattern made up of one or multiple continuous lines taking a point adjacent to the center of the unit as the start point and rotate around it to the edge of the unit, in which, any continuous line has no cross point itself and the multiple lines do not have any other cross point apart from the start one and rotate symmetrically to it.

Description

technical field [0001] The present invention relates to a frequency selective device, and more particularly to a frequency selective device having multiple reflection and transmission frequencies. Background technique [0002] We know that electromagnetic waves can easily bypass obstacles comparable to its working wavelength, so the antenna substrate often needs a size of several wavelengths to effectively block the radiation of the antenna to the back, that is to say, the traditional antenna substrate Can only work in the wavelength range many times smaller than its size. [0003] Now there is a metal photonic crystal-type frequency selective device that can work in a wavelength range much larger than its size. This device is stacked by a metal layer and a dielectric layer. The metal layer has a pattern consisting of one or more periodically arranged units. Each unit has an H-shaped fractal pattern. The pattern is as follows: figure 1 shown. T...

Claims

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Application Information

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IPC IPC(8): H01P7/10
Inventor 李宏强魏泽勇
Owner 李宏强