KR20150014289A

KR20150014289A - Twisted reflector

Info

Publication number: KR20150014289A
Application number: KR1020130089772A
Authority: KR
Inventors: 세르게이 스타카노프
Original assignee: 삼성전기주식회사
Priority date: 2013-07-29
Filing date: 2013-07-29
Publication date: 2015-02-06

Abstract

A twisted reflector according to an embodiment of the present invention includes a metal plate, a first dielectric layer formed on a top surface of the metal plate to have a predetermined thickness, and a second dielectric layer formed on a surface or inside of the first dielectric layer. And a patch portion including a plurality of repeatedly arranged metal patches

Description

Twisted Reflector {TWISTED REFLECTOR}

The present invention relates to a twisted reflector that can have a high polarization conversion rate with a simple structure using a repeatedly arranged metal patch.

BACKGROUND ART [0002] As wireless communication develops, antennas are used in various fields. As one type of such an antenna, a reflector antenna is widely used.

The reflector antenna is an antenna having a reflector and has good reflection characteristics and can be used for long distance communication and the like. Conventionally, a metal strip or a corrugated conducting surface formed with a rectangular groove has been used in the implementation of such a reflector.

However, when such a periodic metal strip or corrugated conductive surface is used, there is a limit to perform polarization conversion only in a narrow frequency band.

For this purpose, a reflector using a meander-shaped groove was developed. However, such a conventional meander structure reflector has a high limitation in inefficiency and polarized conversion loss in a fabrication process required to construct a meander structure.

The following Patent Document 1 relates to a broadband polarized wave transducer and a polarized wave double-reflector antenna using the same, but fails to overcome the above-mentioned limitations.

Korean Patent Publication No. 2009-0107563

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a metal patch which is arranged in two planes different from each other by arranging repeatedly arranged metal patches so that the arrangement interval of patches can be easily adjusted, Provides a twisted reflector.

A first technical aspect of the present invention proposes a twisted reflector. The twisted reflector includes a metal plate, a first dielectric layer formed on the upper surface of the metal plate to have a predetermined thickness, and a patch portion formed on or in the surface of the first dielectric layer and including a plurality of metal patches repeatedly arranged .

In one embodiment, the twisted reflector may further include a second dielectric layer having a dielectric constant equal to that of the first dielectric layer and formed on the lower surface of the metal plate.

In one embodiment, the patch portion includes a plurality of first metal patches formed on a surface of the first dielectric layer and a plurality of second metal patches formed on a predetermined plane parallel to a surface of the first dielectric layer, .

In one embodiment, the patch unit includes a plurality of first metal patches formed in a rectangular shape of a predetermined size, and a plurality of second metal patches formed in a predetermined rectangular shape having a different size and the same ratio as the first metal patches . &Lt; / RTI >

In one embodiment, the plurality of first metal patches are formed on a surface of the first dielectric layer, and the plurality of second metal patches are formed on a surface of the first dielectric layer existing inside the first dielectric layer, And may be formed on a predetermined parallel plane.

In one embodiment, the first metal patch may be electrically connected to the second metal patch through a via hole.

In one embodiment, the via hole may be vertically connected to one edge of the first metal patch and the other edge of the second metal patch.

In one embodiment, the second metal patch is larger in size than the first metal patch, and the gap between the second metal patches may be larger than the gap between the first metal patches.

In one embodiment, the twisted reflector satisfies the following equations,

Where T ₁ and T ₂ are the patch-to-patch distances of the first metal patches in the transverse and longitudinal directions, respectively, and t ₁ and t ₂ are the patch-to-patch distances of the second metal patches in the transverse and longitudinal directions, respectively , and d is the thickness of the first dielectric layer.

According to the embodiment of the present invention, by arranging the repeatedly arranged metal patches on two different planes, it is easy to adjust the arrangement interval of the patches, thereby providing various polarization conversion rates.

1 is a perspective view illustrating an embodiment of a twisted reflector according to the present invention.
2 is a detailed perspective view enlarging a part of FIG.
Figure 3 is a cross-sectional view of Figure 1
4 is a reference diagram for explaining polarization characteristics of a twisted reflector according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

In the drawings referred to in the present invention, elements having substantially the same configuration and function will be denoted by the same reference numerals, and the shapes and sizes of the elements and the like in the drawings may be exaggerated for clarity.

FIG. 1 is a perspective view explaining an embodiment of a twisted reflector according to the present invention, FIG. 2 is a detailed perspective view enlarging a part of FIG. 1, and FIG. 3 is a sectional view of FIG.

Referring to FIG. 1, the twisted reflector includes a patch portion 100 including a repeatedly arranged metal patch.

The twisted reflector may further include a metal plate (not shown), and a dielectric layer (not shown) formed on the upper surface of the metal plate to a predetermined thickness. Here, the patch portion 100 may be formed on the surface or inside the first dielectric layer.

Hereinafter, with reference to Figs. 2 and 3, the structure of the twisted reflector will be described in more detail.

Referring to FIGS. 2 and 3, the patch unit 100 may include a first metal patch 110 and a second metal patch 120.

The first metal patch 110 and the second metal patch 120 may be arranged in the same interval. That is, as shown in the drawing, the first metal patch 110 and the second metal patch 120 have one period in each of the lengths T1 in the longitudinal direction, and one period in the width direction And may be implemented in a periodic system.

Also, the first metal patch 110 may have an interval between t1 patches in the longitudinal direction with the adjacent first metal patch, and may have an interval between t2 patches in the width direction. Meanwhile, in the illustrated example, the second metal patches 120 have the same inter-patch spacing in the length and width direction as g, but may have inter-patch spacings different in length and width direction.

In one embodiment, the first metal patch 110 and the second metal patch 120 have the same shape but different sizes. For example, the first metal patch 110 may be formed in a rectangular shape having a predetermined size, and the second metal patch 120 may have a different size and the same ratio as the first metal patch 110 As shown in FIG.

The spacing between the patches of the second metal patch 120 may be greater than the spacing between the first metal patch 110 and the first metal patch 110. In one embodiment, the second metal patch 120 may be larger in size than the first metal patch 110, Lt; / RTI > patches.

The first metal patch 110 and the second metal patch 120 may exist in different planes from each other. That is, the first metal patches 110 may be arranged in the above-described arrangement on the first plane, and the second metal patches 120 may be arranged in the above-described arrangement on the second plane different from the first plane. Here, the first plane in which the first metal patches 110 are arranged and the second plane in which the second metal patches 120 are arranged may be planes parallel to each other.

The first metal patch 110 may be formed on the surface of the first dielectric layer 200 and the second metal patch 120 may be formed on the surface of the first dielectric layer 200. In some embodiments, May be formed on a plane. Here, the surface of the first dielectric layer 200 and the predetermined plane existing inside the first dielectric layer 200 may have a parallel relationship with each other.

The via holes 130 may be used to electrically connect the first metal patches 110 and the second metal patches 120 that are present on different planes. For example, the via hole 130 is formed in the first metal patch 110, the second metal patch 120, and the metal plate 300 in the vertical direction, and the first metal patch 110, The metal plate 120 and the metal plate 300 can be electrically connected.

In one embodiment, the first metal patch 110 and the second metal patch 120 may have via holes 130 at positions that are farthest apart from each other. That is, the via hole 130 may be connected to one edge of the first metal patch 110 and the other edge of the second metal patch 120. Here, one side edge and the other side edge may be corners present at positions corresponding to each other in the diagonal direction.

The first dielectric layer 200 may be formed on the upper surface of the metal plate 300 in the form of a flat plate having a predetermined thickness d. The first dielectric layer 200 may be formed of a predetermined dielectric material having a characteristic of dielectric constant epsilon and permeability mu.

In one embodiment, the twisted reflector may further comprise a second dielectric layer (not shown), the second dielectric layer having the same dielectric constant as the first dielectric layer, Can be formed as a plane.

The metal plate 300 may be a conductive metal plate.

According to an embodiment, the metal plate 300 may be formed in a curved shape. For example, it may be formed into a curved shape having the same angle. For example, it may be formed in the form of a dish such as a parabola antenna. In this embodiment, the first dielectric layer 200 and the patch portion 100 may also be curved, so that the first metal patch 110 and the second metal patch 120 are also placed on a curved surface parallel to each other .

FIG. 4 is a view for explaining polarization characteristics of a twisted reflector according to the present invention. Hereinafter, polarization characteristics of the twisted reflector according to the present invention will be described with reference to FIGS. 2 and 4. FIG.

E _inc is a vector representing an incident wave, E ₁ is a component vector in the longitudinal direction of Einc, and E ₂ is a component vector in the width direction of Einc.

As shown in FIG. 4, the component vector E2 may correspond to a path through the dielectric through inter-patch spacing. That is, it can correspond to a path passing through the inter-patch interval of the second metal patch 120 after passing the inter-patch interval of the first metal patch 110.

Therefore, the eigenvalues of the impedance matrixes of E ₁ and E ₂ can be expressed by the following equations.

[Equation 1]

&Quot; (2) "

Where ₀ is wavenumber of free space, k means ₀ at normalized operating frequency in the material, W means the impedance W ₀ of the normalized material, d May mean the distance between patches.

In addition, the longitudinal period T ₁ and the transverse direction T ₂ can be calculated from the following equations (3) and (4), respectively, and the permittivity and the permeability of the first dielectric material can be calculated by the following equation (5).

&Quot; (3) "

&Quot; (4) "

&Quot; (5) "

Where T ₁ and T ₂ are the patch-to-patch distances of the first metal patches in the transverse and longitudinal directions, respectively, and t ₁ and t ₂ are the patch-to-patch distances of the second metal patches in the transverse and longitudinal directions, respectively , and d may be the thickness of the first dielectric layer.

This can be expressed by the following equation (6).

&Quot; (6) "

Where f _H is the maximum frequency of the operating frequency and f _L is the minimum frequency of the operating frequency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as a limitation upon the scope of the invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: patch part
110: 1st metal patch
120: 2nd metal patch
130: via hole
200: first dielectric layer
300: metal plate

Claims

Metal plate;
A first dielectric layer formed on the upper surface of the metal plate to have a predetermined thickness; And
A patch portion formed on or in the surface of the first dielectric layer and including a plurality of repeatedly arranged metal patches; And a second reflector.

2. The apparatus of claim 1, wherein the twisted reflector
A second dielectric layer having a dielectric constant equal to that of the first dielectric layer and formed on a lower surface of the metal plate; Further comprising: a twisted reflector.

The apparatus of claim 1, wherein the patch unit
A plurality of first metal patches formed on a surface of the first dielectric layer; And
A plurality of second metal patches formed on a predetermined plane parallel to a surface of the first dielectric layer; And a second reflector.

The apparatus of claim 1, wherein the patch unit
A plurality of first metal patches formed in a rectangular shape of a predetermined size; And
A plurality of second metal arrangements formed in a predetermined rectangular shape having different sizes and ratios from the first metal patch; And a second reflector.

5. The apparatus of claim 4, wherein the plurality of first metal patches
A second dielectric layer formed on the surface of the first dielectric layer,
The plurality of second metal patches
Wherein the second dielectric layer is formed on a predetermined plane parallel to a surface of the first dielectric layer existing inside the first dielectric layer.

The method as claimed in claim 3 or 4, wherein the first metal patch
And electrically connected to the second metal patch through the via hole.

7. The semiconductor device according to claim 6, wherein the via hole
And a second metal patch connected perpendicularly to one side edge of the first metal patch and the other edge of the second metal patch.

5. The method of claim 3 or 4, wherein the second metal patch
The first metal patch having a size larger than that of the first metal patch,
The gap between the second metal patches
Wherein the first metal patch is larger than the gap between the first metal patches.

5. The device according to claim 3 or 4, wherein the twisted reflector
Satisfy the following equations,

Where T ₁ and T ₂ are the patch-to-patch distances of the first metal patches in the transverse and longitudinal directions, respectively, and t ₁ and t ₂ are the patch-to-patch distances of the second metal patches in the transverse and longitudinal directions, respectively and d is the thickness of the first dielectric layer.