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A filter and metamaterial technology, applied in the field of filters, can solve problems such as unbearable, large filter volume, high power, etc., and achieve the effect of miniaturization

Active Publication Date: 2013-07-03
KUANG CHI INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to make a high-power filter, you need a wider bandwidth. If the bandwidth is very narrow, it will not be able to withstand high power
In order to increase the bandwidth, the filter will use multiple microwave resonators, and the resonant frequency of each resonator will be slightly different, so that the combination of multiple resonators will form a broadband filter, but this will lead to the volume of the filter very big

Method used

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Embodiment Construction

[0022] The present invention relates to a kind of filter, mainly refers to microwave filter, such as figure 1 As shown, there is at least one resonant cavity 8 inside, and the two sides of the resonant cavity 8 are equipped with input terminals and output terminals. In the present invention, the medium filled in the resonant cavity 8 is a metamaterial, and the metamaterial can increase the bandwidth of the resonant cavity, thereby reducing the number of filter resonant cavities, and further realizing the miniaturization of the filter.

[0023] like figure 1 As shown, the metamaterial comprises at least one metamaterial sheet 1 . When there is one metamaterial sheet 1, it can be directly fixed in the resonant cavity 8. When there are multiple metamaterial sheets 1, the surfaces of a plurality of metamaterial sheets 1 are bonded together, and a wave-transparent material such as foam can be placed between adjacent two metamaterial sheets 1 to isolate them. open. A support can...

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Abstract

The invention relates to a filter which comprises at least one resonant cavity, as well as an input end and an output end mounted on two side walls of the resonant cavity, wherein at least one metamaterial sheet layer is placed in the resonant cavity; each metamaterial sheet layer comprises a substrate made of a non-metal material and an artificial microstructure attached to the surface of the substrate; and each artificial microstructure is formed by threads of a conductive material and has a geometric pattern. With the adoption of the filter, after the metamaterial sheet layers are added, multiple resonant frequencies can be drawn in, the bandwidth of the single resonant cavity is expanded, so that the filter can bear high power, and the miniaturization of the filter can be realized.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically relates to a filter. Background technique [0002] In microwave devices, cavity filters are very important devices. The cavity filter is composed of several microwave resonant cavities, each resonant cavity has a cavity surrounded by conductive walls (or magnetic permeable walls) of any shape, and can form a dielectric region of electromagnetic oscillation in it, which has storage Electromagnetic energy and select the characteristics of a certain frequency signal. [0003] Resonant cavities are resonant components that work at microwave frequencies. Each resonant cavity has its own resonant frequency, and the bandwidth of each resonant cavity is very narrow. If you want to make a high-power filter, you need a relatively wide bandwidth. If the bandwidth is very narrow, it will not be able to withstand high power. In order to increase the bandwidth, the filter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/207
Inventor 刘若鹏栾琳刘京京苏翠刘豫青刘尧
Owner KUANG CHI INST OF ADVANCED TECH