CN1867242A - Electromagnetic forbidden band structure - Google Patents
Electromagnetic forbidden band structure Download PDFInfo
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- CN1867242A CN1867242A CN 200510025969 CN200510025969A CN1867242A CN 1867242 A CN1867242 A CN 1867242A CN 200510025969 CN200510025969 CN 200510025969 CN 200510025969 A CN200510025969 A CN 200510025969A CN 1867242 A CN1867242 A CN 1867242A
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- forbidden band
- band structure
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- electromagnetic forbidden
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Abstract
The invention relates to an electromagnetic forbidden band structure, which comprises a microwave medium plate and an electromagnetic forbidden band structure on the microwave medium plate. Wherein, said electromagnetic forbidden band structure is the plane formed by several square single cells; said single cell is formed by two curvature wires which are vertical to each other at the center and four conductive blocks separated by said wires; said wires and conductive blocks are connected at the center of single cell; two nearby single cells are separated by seam and connected by wire; the size of single cell can be adjusted to adjust the forbidden band frequency and width. The invention uses curving wires to increase its inductance; and reduce the size of single cell, at same frequency condition; therefore, the useful single cell number is increased in the same size, to restrain the electromagnetic wave transmission effectively.
Description
Technical field
The present invention relates to a kind of electromagnetic forbidden band structure.
Background technology
Electromagnetic forbidden band structure (Electromagnetic Bandgap, EBG) or forbidden photon band (Photonic Bandgap, PBG) material suppresses the characteristic of a certain frequency (section) electromagnetic wave propagation because of it is distinctive, have broad application prospects at microwave and optical communication field, caused people's extensive interest in recent years.The difference of root a tree name periodic structure arrangement mode can be divided into three-dimensional, two dimension (also claiming the plane) and one dimension three major types.Wherein the structure of two dimensional surface or directrix plane is maximum because of hanging down characteristics such as section and preparation technology are simple research report in existing document, typical case's representative has " mushroom " structure of people's propositions such as Yablonovitch, as shown in Figure 1 and Figure 2, wherein Fig. 1 is the end view of this technical scheme, Fig. 2 is the front elevation of this technical scheme, and the UCPBG structural material of T.Itoh proposition, the unit cell physical dimension figure of this technical scheme is as shown in Figure 3.Although above-mentioned two class plane electromagnetic forbidden band structural materials can provide enough forbidden band band widths to satisfy most microwave device application needs, but the plane unit cell size still showed excessive when substrate adopted the lower medium carrier of dielectric constant, like this in order to satisfy limited components and parts physical dimension requirement, the actual unit cell periodicity that uses will reduce greatly in microwave and optical communication components and parts, correspondingly because the minimizing of the unit cell number that adopts, electromagnetic forbidden band structural material suppresses this characteristic performance of electromagnetic wave propagation also will have a greatly reduced quality, and this limitation when the low frequency applications is more outstanding.The novel electromagnetic forbidden band structure of exploitation small size, broad stopband is the essential basis of developing used for mobile terminal small size EBG antennas such as mobile phone.
Summary of the invention
The object of the present invention is to provide a kind of small size, the novel electromagnetic forbidden band structure in broad stopband.
Adopt following technical scheme for reaching above-mentioned purpose the present invention:
A kind of electromagnetic forbidden band structure, comprise microwave-medium plate and the electromagnetic forbidden band structure of being located on the microwave-medium plate, described electromagnetic forbidden band structure is the planar structure that a plurality of square unit cells are formed, described unit cell is by being arranged at unit cell mutually perpendicular two bending wire in middle part and being formed by four conducting blocks that described conductor separation is opened, described lead and conducting block are interconnected at unit cell middle part, are separated by finedraw between adjacent two unit cells and by described wire interconnection.By regulating the size of physical dimension in the described unit cell, the forbidden band frequency and the width of adjustable composite functional material.
As a kind of optimal way of the present invention, described microwave dielectric material can be DIELECTRIC CONSTANT
rThe polytetrafluoroethylmaterial material of=2-20 or DIELECTRIC CONSTANT
r=10～1000 high dielectric microwave ceramic material.Described electromagnetic forbidden band structural material can be selected from copper, silver, aluminium or gold.
Technical solution of the present invention is compared with the UCPBG (Fig. 3) that T.Itoh proposes, under the same frequency condition, owing to adopt crooked fine rule structure, make its inductance increase greatly, unit cell size can reduce greatly, compare with the technical scheme of T.Itoh, under the same frequency condition, its size dwindles 30～60%.Available unit cell number can increase greatly under the measure-alike condition of overall geometry, and the unit cell number increases, and making electromagnetic forbidden band structural material suppress this characteristic of electromagnetic wave propagation can more effectively bring into play.
Description of drawings
Fig. 1 is documents 1 a technical scheme end view
Fig. 2 is documents 1 a technical scheme front elevation
Fig. 3 is documents 2 technical scheme unit cell physical dimension figure
Fig. 4 is electromagnetic forbidden band structure figure of the present invention
Fig. 5 is semi-simple born of the same parents' structure enlarged drawing of electromagnetic forbidden band of the present invention
Embodiment
As Fig. 4, shown in Figure 5, a kind of electromagnetic forbidden band structure, comprise microwave-medium plate 1 and the electromagnetic forbidden band structure of being located on the microwave-medium plate 2, described electromagnetic forbidden band structure 2 is the planar structure that a plurality of square unit cells are formed, described unit cell is by being arranged at unit cell mutually perpendicular two bending wire 3 in middle part and being formed by described lead 3 separated four conducting blocks 4, described lead 3 and conducting block 4 are interconnected at unit cell middle part, are separated by finedraw between adjacent two unit cells and by described wire interconnection.Plane electromagnetic forbidden band structure among Fig. 4, its equivalence LC network for distributing, wherein Wan Qu lead 3 is equivalent to inductance and adjacent two big square conducting blocks 4 by the finedraw separation are equivalent to electric capacity.By regulating the size of physical dimension in the described unit cell, the forbidden band frequency and the width of adjustable composite functional material.
Described microwave dielectric material can be DIELECTRIC CONSTANT
rThe polytetrafluoroethylmaterial material of=2-20 or DIELECTRIC CONSTANT
r=10～1000 high dielectric microwave ceramic material.By standard photolithography process or chemical plating method preparation EBG style 2 is arranged on its surface, be provided with the metal floor (not shown) at its back side, EBG style 2 and metal floor all adopt copper, by regulating the size of a, b, w, each physical dimension of s in Fig. 5 unit cell, realize the forbidden band frequency and the width of regulation and control composite functional material.
Claims (3)
1, a kind of electromagnetic forbidden band structure, comprise microwave-medium plate and the electromagnetic forbidden band structure of being located on the microwave-medium plate, described electromagnetic forbidden band structure is the planar structure that a plurality of unit cells are formed, described unit cell is by being arranged at unit cell mutually perpendicular two leads in middle part and being formed by four conducting blocks that described conductor separation is opened, described lead and conducting block are interconnected at the unit cell middle part, separate by finedraw between adjacent two unit cells and by described wire interconnection, it is characterized in that: described single cell structure is square, and described two mutually perpendicular leads are crooked lead.
2, a kind of electromagnetic forbidden band structure according to claim 1, it is characterized in that: described microwave dielectric material can be DIELECTRIC CONSTANT
rThe polytetrafluoroethylmaterial material of=2-20 or DIELECTRIC CONSTANT
r=10～1000 high dielectric microwave ceramic material.
3, a kind of electromagnetic forbidden band structure according to claim 1 and 2, it is characterized in that: electromagnetic forbidden band structural material is selected from copper, silver, aluminium or gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025969 CN1867242A (en) | 2005-05-19 | 2005-05-19 | Electromagnetic forbidden band structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025969 CN1867242A (en) | 2005-05-19 | 2005-05-19 | Electromagnetic forbidden band structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1867242A true CN1867242A (en) | 2006-11-22 |
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ID=37426068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510025969 Pending CN1867242A (en) | 2005-05-19 | 2005-05-19 | Electromagnetic forbidden band structure |
Country Status (1)
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| CN (1) | CN1867242A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605448B (en) * | 2008-06-11 | 2012-12-26 | 联发科技股份有限公司 | Shielding device and a printed circuit board with shielding protection |
| CN106751254A (en) * | 2016-12-08 | 2017-05-31 | 中国电子科技集团公司第四十六研究所 | A kind of high-k covers Copper Foil microwave-medium plate and preparation method thereof |
-
2005
- 2005-05-19 CN CN 200510025969 patent/CN1867242A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605448B (en) * | 2008-06-11 | 2012-12-26 | 联发科技股份有限公司 | Shielding device and a printed circuit board with shielding protection |
| CN106751254A (en) * | 2016-12-08 | 2017-05-31 | 中国电子科技集团公司第四十六研究所 | A kind of high-k covers Copper Foil microwave-medium plate and preparation method thereof |
| CN106751254B (en) * | 2016-12-08 | 2018-12-14 | 中国电子科技集团公司第四十六研究所 | A kind of high dielectric constant covers copper foil microwave-medium plate and preparation method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |