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Force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber and its preparation method

A conductive rubber and flexible technology, which is applied in the field of power control adjustable broadband flexible absorbing devices, can solve the problems of inability to realize the tuning of the absorption frequency, reduce the application value, etc., and achieve the effect of widening the working frequency band and improving the tensile strength

Active Publication Date: 2017-06-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the absorption point is formed, the absorption point will be determined, and the tuning of the absorption frequency in a wide frequency band cannot be realized, which obviously reduces the application value.

Method used

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  • Force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber and its preparation method
  • Force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber and its preparation method
  • Force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1. The force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber of the present invention includes a rectangular parallelepiped conductive rubber 1 , a dielectric layer 2 , a ceramic block 3 and a tension measuring device 5 . Each of the four corners of the conductive rubber 1 has a positioning hole 4; two square dielectric layers 2 are located at the center of the front of the conductive rubber 1, and the left and right distances from the center line are the same size; the size of the two square ceramic blocks 3 is the same as that of the square dielectric layer 2. And they are respectively located directly above the two square dielectric layers 2 . The dielectric layer 2 is initially in a liquid state, and is coated on the conductive rubber 1 by a spin coating method, and then the ceramic block 3 is pressed on the dielectric layer 2, and the conductive rubber 1, the dielectric layer 2 and the ceramics are heated by a stepw...

Embodiment 2

[0022] Example 2. The preparation method of the mechanically tunable broadband flexible wave-absorbing device based on conductive rubber comprises the following steps:

[0023] (a) Machining positioning holes 4 at the four corners of the conductive rubber 1;

[0024] (b) Apply the cyanoacrylate-coated dielectric layer 2 to the center of the front surface of the conductive rubber 1 by spin coating, keeping the same distance from the left and right centerlines, and the initial distance between two dielectric layers 2 of the same size is 0.5mm , and then stick two ceramic blocks 3 of the same size directly above the two dielectric layers 2, and heat-cure them by a stepwise heating method;

[0025] (c) The conductive rubber 1 is clamped on the tension measuring device 5 through the four corner positioning holes 4, the conductive rubber 1 is fixed by the tension measuring device 5 fastening screws, and the distance between the two chucks of the tensile measuring device 5 is change...

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Abstract

The invention discloses a force-controlled adjustable-broadband flexible wave absorption device based on conductive rubber and a manufacturing method for the device, and is used for solving technical problems of fixed wave absorption frequency point and narrow working frequency band of an existing wave absorption device. The technical scheme is that a bottom plate adopts the conductive rubber to replace a conventional metal back plate, and the conductive rubber has electromagnetic wave shielding effectiveness and has very good tensile strength. The length of the conductive rubber is changed through stretching, the distance between two wave absorption ceramic blocks of an upper layer is changed accordingly, the distance change causes change of electromagnetic coupling between the ceramic blocks, and the wave absorption frequency is moved accordingly, so that dynamic change of the absorption frequency along with externally applied pull force is realized, the working frequency band is expanded, an active wave absorption structure is formed, and the maximum adjustment amplitude within a stretching limit of the conductive rubber can reach 0.37 GHz.

Description

technical field [0001] The invention relates to a wave-absorbing device, in particular to a force-controlled and adjustable broadband flexible wave-absorbing device based on conductive rubber. It also relates to a preparation method of the force-controlled adjustable broadband flexible wave-absorbing device based on conductive rubber. Background technique [0002] Absorbing materials are widely used in the design and preparation of new electronic information components, and are also an effective means for mobile platforms such as military fighters to reduce their own radar cross section (RCS). However, once the traditional absorbing materials are manufactured, their frequency band characteristics will be fixed, which greatly limits the application of absorbing materials in complex situations. [0003] refer to Figure 6 , the document "Analysis and design of wire-based metamaterial absorbers using equivalent circuit approach," Journal of Applied Physics 113, 114902 (2013), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
Inventor 邱克鹏冯树琦张富利张卫红刘子君吴晨
Owner NORTHWESTERN POLYTECHNICAL UNIV
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