CN103825103A

CN103825103A - Method for constructing broadband metamaterial based on various dielectric spheres

Info

Publication number: CN103825103A
Application number: CN201410084976.1A
Authority: CN
Inventors: 李少甫; 张信歌; 李俊霖
Original assignee: Southwest University of Science and Technology; Institute of Applied Electronics of CAEP
Current assignee: Southwest University of Science and Technology; Institute of Applied Electronics of CAEP
Priority date: 2014-03-10
Filing date: 2014-03-10
Publication date: 2014-05-28

Abstract

The invention discloses a method for constructing a broadband metamaterial based on various dielectric spheres. The broadband metamaterial consists of different dielectric spheres, a fixed material, a filling material and a cover film. A three-dimensional periodic matrix is formed by the different dielectric spheres; and by regulating the parameters such as radii, distances and the like of the dielectric spheres, the parameters such as working frequency bands and the like of the metamaterial can be regulated and controlled to ensure that the metamaterial can become a negative-refraction index material or a specific-dielectric parameter material or an isotropic material or an anisotropic material, and the array form of the metamaterial can be regulated to ensure that the metamaterial can become various space isotropic/anisotropic materials. The invention also discloses a plurality of technological processes for machining the material.

Description

Broadband anisotropic media building method based on medium ball

Technical field

The present invention relates to the Method and process of the artificial metamaterial of processing and manufacturing.

Background technology

Metamaterial is also referred to as artificial metamaterial or super material, and it is a kind of important electromagnetic material.At present, existing multiple different structure is suggested and realizes anisotropic media.Calendar year 2001, the structure that the people such as D.R.Smith have proposed SRR+Rod first realizes anisotropic media, the incorgruous passband (Left-handed passband) of anisotropic media is very narrow in early days, insertion loss is very large, for improving its performance, people improve the shape of its unit, have successively proposed again many new constructions, for example broadside coupled open circuit ring resonator structure, symmetrical ring structure, S shape resonator structure etc.2009, the patent of invention (CN101662055A) that the Chen Hong of Zhejiang University contains proposed a kind of broadband metamaterial and its preparation method has been described in detail in detail by print respectively the method for two kinds of different mediums inside and outside anisotropic media ring.2008, the doctorate paper of the Peng Liang of Zhejiang University was set forth realization and the application of full medium anisotropic media from the EFFECTIVE MEDIUM THEORY aspect of anisotropic media, and had mentioned and used the method for two medium balls to realize full medium anisotropic media.2011, the microballoon that the people's such as the Liu Ruopeng of Shenzhen Kuang-Chi Institute of Advanced Technology patent of invention (CN102480037B) utilizes hot-pressing technique to fill required electromagnetic property in the macromolecule membrane of semi-solid preparation was realized super material, has provided multiple preparation method; The method that their another patent of invention (CN102480035A) utilizes mechanical means to suppress different electromagnetic property medium balls in medium substrate obtains a kind of novel super material of full dielectric.

The production technology that these two patents of invention propose all adopts the mode of microballoon filled media.Be different from patent of invention above, the present invention proposes several brand-new manufacturing technique methods and fix medium ball, adopt especially medium ball, different aligning methods is arranged medium ball, has greatly expanded the bandwidth of anisotropic media, is applicable to wide-band microwave signal application.

Summary of the invention

The object of the invention is to propose several Method and process of constructing artificial anisotropic media with medium ball, for the artificial metamaterial of processing and manufacturing broadband.

Technical scheme of the present invention: different medium ball is fixed into three-dimensional periodic by several processes in space and arranges, the middle low-loss microwave dielectric of filling, surface coverage thin-film material is through the artificial metamaterial of hot-forming one-tenth broadband.It is characterized in that of this material, it is situated between by same radius and different electricity or the medium ball of magnetic Jie constant or the medium ball of same electrical Jie or magnetic Jie constant and different radii, or different radii and different electricity are situated between or the medium ball of magnetic Jie constant, medium ball immobilization material pipe or line or division board, surface coverage thin-film material, packing material composition.

Material of the present invention is by adjusting radius, electricity Jie or magnetic Jie constant of medium ball, the spatial distribution spacing of medium ball, and the means such as packing material regulate the equivalent electric of artificial metamaterial to be situated between or magnetic Jie constant and working band.

The present invention proposes the production technology of this material of several processing.

Major advantage of the present invention: 1. adopt the measures such as medium ball to make the non-constant width of working frequency range of artificial metamaterial; 2. this material is three-dimensional structure structure, can have specific equivalent electric at three-dimensional simultaneously and be situated between or magnetic Jie performance; 3. can be by changing the distributed in three dimensions situation of medium ball, such as the spacing of three-dimensional, the distribution of medium ball radius or medium ball material, become Three-Dimensional Isotropic, or three dimensional anisotropic, orthogonal battle array, circle battle array, spherical array or other special battle array, meet the different needs artificial metamaterial; 4. have broad application prospects.

accompanying drawing explanationbelow in conjunction with embodiment, the present invention will be further described.Figure of description is several embodiments of the present invention.

Fig. 1 is the plastic tube fixed structure cutaway view that embodiment 1 provides;

Fig. 2 is the threading fix structure cutaway view that embodiment 2 provides;

Fig. 3 is the packing material fixed structure cutaway view that embodiment 3 provides;

Fig. 4 is the packing material schematic diagram that is used for fixing medium ball in embodiment 3;

Fig. 5 is the special-shaped cutaway view of packing material fixed structure that embodiment 4 provides;

embodimentseveral execution mode of the present invention and technique are shown in Figure of description.

embodiment 1, plastic tube is fixed: see Figure of description 1.Accompanying drawing 1 is cut-away view, comprises three kinds of

medium balls

1,2,3, and medium ball is aluminium dioxide Ceramic Balls, zirconia ceramics ball, strontium titanates (BST) pottery, or other high dielectric parameter material ball; Plastic tube 4; Packing material 5, low-k and low-loss material for packing material, as: expanded microporous polytetra fluoroethylene-EPTEE, foaming low-loss polymer etc.; Coverlay 6.In institute's drawings attached, kind, size, number and the spacing of ball do not represent actual conditions.

Step 1.1: according to the radius of the selected different medium ball of operating frequency range, kind number and the spacing of different medium ball.If the resonance frequency of the general medium ball of the radius of the medium ball of selecting is covered operating frequency range, the typical data table of the radius that subordinate list 1 has provided different medium ball under particular resonant frequency; As for kind number and spacing, obtain according to the Maxwell equation of electromagnetic field and the analysis of many bodies coupled wave theory, or with Numerical Calculation of Electromagnetic Fields and emulation, or determine by testing.More than analyze the impact that will comprise immobilization material and packing material;

Figure 2014100849761100002DEST_PATH_IMAGE001

Step 1.2: machining medium ball, the thermal contractible plastic pipe of mounting medium ball, packing material, coverlay, installation and hot pressing die etc.;

Step 1.3: pack medium ball into thermal contractible plastic pipe under the support of installation mold, heating pyrocondensation plastic tube fixes medium ball spacing;

Step 1.4: be filled with packing material, cover film is hot-forming;

Step 1.5: detect.

embodiment 2, threading is fixed: see Figure of description 2.Accompanying drawing 2 is cut-away views, and accompanying drawing 2 is similar with accompanying drawing 1 structure, just fixedly becomes threading from plastic tube and fixes, and 7 is static line.

Step 2.1: identical with step 1.1

Step 2.2: the medium ball of processing belt sky, static line, packing material, coverlay, installation and hot pressing die etc.;

Step 2.3: under the support of installation mold, threading is fixed by medium ball;

Step 2.4: be filled with packing material, cover film is hot-forming;

Step 2.5: detect.

embodiment 3, fixes with packing material: see Figure of description 3.Accompanying drawing 3 is cut-away views, and accompanying drawing 3 is similar with the structure of accompanying

drawing

1,2, just medium ball is directly fixed with packing material.Accompanying drawing 4 is the packing material structural representations that are used for fixing medium ball, and its top and bottom all exist symmetrical semi-circular recesses 8,9, and its radius is identical with the radius of medium ball.

Step 3.1: identical with step 1.1;

Step 3.2: machining medium ball, packing material, coverlay, installation and hot pressing die etc.;

Step 3.3: under the support of installation mold, fix one deck medium ball, be filled with packing material hot-forming;

Step 3.4: one deck medium ball, to the last one deck are installed and fixed down to repeating step 3.3;

Step 3.5: cover film is hot-forming;

Step 3.6: detect.

embodiment 4, fixes with packing material, special-shaped (semicolumn battle array): see Figure of description 5.Accompanying drawing 5 is cut-away views, and the materials similar of accompanying drawing 5 and accompanying drawing 3, just becomes semicolumn battle array the square formation of mounting medium ball, and with the direct mounting medium ball of packing material, fixed form is identical with accompanying drawing 4 equally.

Step 4.1: identical with step 1.1;

Step 4.2: machining medium ball, packing material, coverlay, installation and hot pressing die etc.;

Step 4.3: under the support of installation mold, fix one deck medium ball, be filled with packing material hot-forming;

Step 4.4: one deck medium ball, to the last one deck are installed and fixed down to repeating step 4.3;

Step 4.5: cover film is hot-forming;

Step 4.6: detect.

Claims

1. construct the Method and process of artificial anisotropic media with medium ball: several processes of different medium ball are fixed into three-dimensional periodic arrange in space; the middle low-loss microwave dielectric of filling, surface coverage thin-film material is through the artificial metamaterial of hot-forming one-tenth broadband; This material is characterized in that, it is situated between by same radius and different electricity or the medium ball of magnetic Jie constant or the medium ball of same electrical Jie or magnetic Jie constant and different radii, or different radii and different electricity are situated between or the medium ball of magnetic Jie constant, medium ball immobilization material pipe or line or division board, surface coverage thin-film material, packing material composition.

2. according to claim 1 by adjusting radius, electricity Jie or magnetic Jie constant of medium ball, the spatial distribution spacing of medium ball; the means such as packing material regulate equivalent electric Jie of artificial metamaterial or the method for magnetic Jie constant and working band: according to the radius of the selected different medium ball of operating frequency range; see specification subordinate list 1, kind number and the spacing of different medium ball; If the resonance frequency of the general medium ball of the radius of the medium ball of selecting is covered operating frequency range; As for kind number and spacing, obtain according to the Maxwell equation of electromagnetic field and the analysis of many bodies coupled wave theory, or with Numerical Calculation of Electromagnetic Fields and emulation, or determine by testing; More than analyze the impact that will comprise immobilization material and packing material.

3. the plastic tube mounting medium ball technique of using according to claim 1 and 2, is characterized in that packing medium ball into thermal contractible plastic pipe under the support of installation mold, and heating pyrocondensation plastic tube fixes medium ball spacing; Be filled with packing material, cover film is hot-forming.

4. according to claim 1 and 2 by threading mounting medium ball technique, it is characterized in that by medium ball threading is fixed under the support of installation mold; Be filled with packing material, cover film is hot-forming.

5. the packing material mounting medium ball technique of using according to claim 1 and 2, is characterized in that, under the support of installation mold, fixing one deck medium ball, is filled with packing material hot-forming; Constantly repeat this step and install and fix lower one deck medium ball, to the last one deck; Cover film is hot-forming.

6. the special-shaped technique of packing material mounting medium ball of using according to claim 1 and 2, is characterized in that, under the support of installation mold, fixing one deck medium ball, is filled with packing material and is hot pressed into abnormal shape (semicolumn battle array); Constantly repeat this step and install and fix lower one deck medium ball, to the last one deck; Cover film is hot-forming.

7. according to other special-shaped medium ball array processes of the various combinations described in claim 3,4,5,6.