KR101822754B1 - Horn antenna and method for manufacturing horn antenna - Google Patents

Abstract

The present invention provides a horn antenna which can improve a gain without affecting a reflective loss (S11) by a filter member providing a lattice structure and a metamaterial structure located on an opening surface of a horn, and a manufacturing method thereof. According to an embodiment of the present invention, the horn antenna comprises: the horn guiding an electromagnetic wave incident or emitted through the opening surface; and the filter member which is adjacently located to the opening surface, and through which the electromagnetic wave is passed. The filter member includes: a base element; the lattice structure provided in the base element, and dividing the opening surface; and the metamaterial structure located in a section which is divided by the lattice structure.

Description

TECHNICAL FIELD [0001] The present invention relates to a horn antenna and a method for manufacturing the horn antenna,

The present invention relates to a horn antenna and a method of manufacturing the horn antenna, and more particularly, to a horn antenna capable of improving gain by a filter member having a lattice structure and a meta-material structure disposed on an opening surface of a horn, To a method of manufacturing a horn antenna.

Recently, researches for designing an antenna using a metamaterial have been rapidly increasing.

Metamaterials are substances that have electromagnetic properties that do not exist in the natural world by periodically arranging a specific unit lattice.

Among many kinds of metamaterials, metamaterials capable of arbitrarily adjusting the values of permittivity and permeability are attracting much attention.

Typically, materials called Negative Refractive Index (NRI) and Left-Handed Material (LHM) have negative values of effective dielectric constant and permeability, and electric field, magnetic field, and propagation direction follow the left-hand rule.

The characteristics of the metamaterial can be applied to the antenna to improve the performance of the antenna.

Composite Right / Left Handed Transmission Line (CRLH-TL) structure is typical for meta-material structure applied to antennas. One of the features of this structure is the resonant mode in which the propagation constant is zero, and the wavelength becomes infinite and the phase delay due to the radio wave transmission does not occur.

The resonant frequency of this mode is determined by the parameters of the CRLH-TL structure, so it does not depend on the length of the antenna, which is very advantageous for downsizing the antenna.

In this regard, KR2011-7023893, filed on March 11, 2010, discloses a high gain metamaterial antenna element.

An object according to an embodiment is to provide a horn antenna capable of improving gain without affecting reflection loss S11 by a filter member having a lattice structure and a meta-material structure disposed on an opening surface of a horn, And to provide a method of manufacturing an antenna.

An object of the present invention is to provide a horn antenna and a method of manufacturing the horn antenna, which can be variously implemented so that the lattice structure and the meta-material structure of the filter member are formed in the same base element or in different base elements.

An object of the present invention is to provide a horn antenna and a method of manufacturing the horn antenna that can be easily manufactured through plating or etching and can reduce the manufacturing cost by silk screen printing technique, printing technique using conductive ink, and the like.

According to an aspect of the present invention, there is provided a horn antenna comprising: a horn for guiding an electromagnetic wave incident or emitted through an opening; And a filter member disposed adjacent to the opening surface and through which the electromagnetic wave is transmitted, the filter member comprising: a base element; A grating structure provided on the base element to divide the opening surface; And a meta-material structure disposed in the section divided by the lattice structure.

According to one aspect of the present invention, the size of the opening surface is formed to be larger than the wavelength? Of the electromagnetic wave, and the size of the partition divided by the lattice structure can be 0.5? Or more.

According to one aspect of the present invention, the meta material structure includes at least one unit cell made of a metal material, and the size or arrangement interval of the unit cells may be? / 4 or less.

According to one aspect, a low dielectric material is disposed in the horn, and the filter member may be disposed on the low dielectric material.

According to one aspect, the base element comprises a plastic film, PCB or FPCB, wherein the lattice structure or the meta-material structure is formed on the base element by a silk screen printing technique, a printing technique using conductive ink, .

According to one aspect of the present invention, the lattice structure is provided on one side of the base element, and the meta-material structure may be provided on the other side opposite to the one side of the base element.

According to one aspect, the base element is provided in plurality, and the base element comprises: a first base element having the lattice structure; And a second base element spaced apart from the first base element and having the meta-material structure, wherein a distance between the first base element and the second base element is? / 3 or less .

According to an aspect of the present invention, there is provided a method of manufacturing a horn antenna, including: providing a horn for guiding electromagnetic waves incident or emitted through an opening; Fabricating a filter member through which the electromagnetic wave passes; Inserting a low dielectric material into the horn; And disposing the filter member on the low dielectric material, wherein the filter member is provided with a lattice structure and a meta material structure made of a metal material.

According to one aspect of the present invention, the step of fabricating the filter member through which the electromagnetic wave is to be transmitted includes the steps of: providing a base element provided with a plastic film; Wherein a sheet having a hole corresponding to the lattice structure and the metamaterial structure is disposed on one side of the base element; And rolling the conductive ink made of the metallic material or the metallic material on the sheet, wherein the lattice structure and the metamaterial structure are formed on one side of the base element.

According to one aspect of the present invention, the step of fabricating the filter member through which the electromagnetic wave is to be transmitted includes the steps of: providing a base element provided with a plastic film; The first sheet having a hole corresponding to the lattice structure disposed on one side of the base element; Placing a second sheet having holes corresponding to the meta material structure on the other side of the base element; And a conductive ink made of the metallic material or the metallic material is rolled on the first sheet or the second sheet, wherein the lattice structure is formed on one surface of the base element and the other surface of the base element The meta material structure may be formed.

According to one aspect of the present invention, the step of fabricating the filter member through which the electromagnetic wave is to be transmitted includes the steps of: providing a first base element and a second base element provided with a plastic film; Placing a first sheet having holes on the first base element to correspond to the lattice structure; Placing a second sheet with holes corresponding to the meta material structure on the second base element; And a conductive ink comprising the metallic material or the metallic material is rolled on the first sheet or the second sheet, wherein the grid structure is formed on the first base element, and the second base element The meta material structure may be formed.

According to one aspect of the present invention, the step of fabricating the filter member through which the electromagnetic wave is to be transmitted includes the steps of: providing a base element provided as a substrate; And plating a metal material on the base element or etching the base element to correspond to the lattice structure and the metamaterial structure.

According to one aspect of the present invention, the size of the opening surface is formed to be larger than the wavelength (?) Of the electromagnetic wave, the size of the partition divided by the lattice structure is 0.5λ or more, The size or arrangement spacing may be less than / 4.

According to the horn antenna and the horn antenna manufacturing method of the embodiment, the gain can be improved without affecting the return loss S11 by the filter member having the lattice structure and the meta-material structure disposed on the opening surface of the horn, Can be improved.

According to the horn antenna and the horn antenna manufacturing method of the embodiment, the lattice structure and the meta-material structure of the filter member can be variously formed in the same base element or in different base elements.

According to the horn antenna and the method of manufacturing the horn antenna according to the embodiment, it is possible to easily manufacture through the silk screen printing technique, the printing technique using the conductive ink, the plating or the etching, and the manufacturing cost can be reduced.

1 schematically shows the configuration of a horn antenna according to an embodiment.
2A and 2B are exploded perspective views of a horn antenna according to an embodiment.
3A to 3C show the lattice structure and the metamaterial structure.
Figure 4 shows another type of filter element.
Figure 5 shows yet another type of filter element.
6 is a flowchart showing a method of manufacturing a horn antenna according to an embodiment.
Fig. 7 is a flowchart showing a step in which the filter member is manufactured.
8 is a flow chart showing a step in which a filter member is manufactured.
9 is a flow chart showing a step in which a filter member is manufactured.
10 is a flowchart showing a step of manufacturing a filter member.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

FIGS. 2A and 2B are exploded perspective views of a horn antenna according to an embodiment, FIGS. 3A to 3C show a lattice structure and a meta-material structure, FIG. Fig. 4 shows another type of filter element, and Fig. 5 shows yet another type of filter element.

Referring to FIG. 1 or 2, the horn antenna 10 according to an embodiment may include a horn 100 and a filter member 200.

The horn 100 can guide electromagnetic waves incident or emitted through the opening surface 102.

The horn antenna 10 including the horn 100 is very widely used in a band of 1 GHz or more and can provide a high gain, a low reflection loss (S11), and a wide bandwidth in comparison with other types of antennas.

At this time, the horn 100 may be provided with an H-plane sector horn, an E-plane sector horn, a pyramidal horn, or a circular horn having an opening surface on one side. As long as an opening surface is formed on one side of the horn 100 in this manner, any one can be used.

The size of the opening surface 102 of the horn 100 may be the same as the wavelength? Of the electromagnetic wave or larger than the wavelength of the electromagnetic wave. Whereby the electromagnetic wave can be divided through the filter member 200 described below.

The filter member 200 may be disposed adjacent to the opening surface 102 of the horn 100 described above.

For example, the filter member 200 may be disposed on the top of the opening surface 102 or on the bottom of the opening surface 102. As such, it is possible to place the filter member 200 adjacent to the opening surface 102 so that electromagnetic waves can pass through it.

The filter member 200 includes a base element (not shown), a grating structure 210 provided on the base element and dividing the opening surface 102, and a meta material (not shown) disposed in the partition divided by the grating structure 210. [ Structure 220 as shown in FIG.

The base element may be provided, for example, with a plastic film, a printed circuit board (PCB) or a flexible printed circuit board (FPCB). However, the base element is not limited thereto, and any dielectric may be used.

3A, the lattice structure 210 may include a plurality of transverse members 212 and a plurality of longitudinal members 214 to divide the opening surface 102 of the horn 100. In one embodiment,

The lattice structure 210 may be formed of a metal material such as Ag, Carbon, Cu, Al, Fe, or the like.

In addition, the size of the partition divided by the lattice structure 210 can be 0.5 lambda or more. The size a of the section divided by the grid structure 210 means the distance that a plurality of the transverse members 212 or the plurality of longitudinal members 214 are spaced from each other.

Specifically, the performance of the horn antenna 10 can be changed as follows according to the size of the section divided by the lattice structure 210 or the lattice spacing.

frequency wavelength Lattice spacing Wavelength and
ratio Benefits when there is no grid If you have a grid benefit effect 10.7 28.0 12.75 0.455 10.6 9.2 -1.4 11.2 26.8 12.75 0.476 10.9 9.8 -1.1 11.7 25.6 12.75 0.497 11.2 11.1 -0.1 12.2 24.6 12.75 0.519 11.5 11.8 0.3 12.7 23.6 12.75 0.540 11.8 12.3 0.5

As shown in Table 1, when the lattice spacing is smaller than half wavelength (0.5?), Electromagnetic wave can not pass through, and the performance of the horn antenna 10 drops sharply. On the other hand, it can be seen that the performance of the horn antenna 10 is improved by 30% or more when the lattice spacing is larger than half wavelength (0.5?).

3B and 3C, the meta-material structure 220 may include at least a unit cell 222 made of a metal material.

The metal material may be Ag, Carbon, Cu, Al, Fe or the like as the lattice structure 210 and may be the same or different metal material as the lattice structure 210.

3B, when a plurality of unit cells 222 are provided, a plurality of unit cells 222 may be spaced apart from each other, and a space may be formed between the plurality of unit cells 222 have.

Specifically, the size b or the arrangement interval c of the unit cells 222 should be? / 4 or less.

The size b of the unit cell 222 means the length from one side of the unit cell 222 to the other side and it is preferable that the size b of the unit cell 222 is equal to or smaller than? .

The arrangement interval c of the unit cells 222 is the sum of the size b of the unit cells 222 and the separation distance between the unit cells 222. The arrangement interval c of the unit cells 222 is also λ / 4 or less.

3C, when one unit cell 222 is provided, one unit cell 222 may be disposed at the center of the partition divided by the lattice structure 210. For example, as shown in FIG. At this time, the size b of the unit cell 222 may be set to about? / 4.

In FIGS. 3B and 3C, the unit cells 222 are formed in a rectangular shape, and the unit cells 222 are arranged to have the same size or the unit cells 222 have the same intervals, but the present invention is not limited thereto.

For example, the shape of the unit cell 222 may be various shapes such as a circle, a donut shape, a square having a center empty space, and a C shape. Therefore, it is natural that it can be variously prepared.

Specifically, the performance of the horn antenna 10 can be changed according to the size of the unit cell 222 as follows.

frequency wavelength Wavelength / 4 Unit cell size Comparison with Wavelength spirit Lattice + metamaterial benefit benefit effect 10.7 28.0 7.0 6.4 0.23 11.4 11.7 0.3 11.2 26.8 6.7 6.4 0.24 11.7 11.5 -0.2 11.7 25.6 6.4 6.4 0.25 12.1 11.1 -1.1 12.2 24.6 6.2 6.4 0.26 12.4 10.8 -1.6 12.7 23.6 2.9 6.4 0.27 12.6 11.1 -1.5

As shown in Table 2, when the size of the unit cell 222 is larger than? / 4, a loss occurs in the gain compared to the case where the filter member 220 is absent, and when the size of the unit cell 222 is? / 4, the gain is improved as compared with the case where the filter member 220 is not provided.

It is a matter of course that the filter member 200 may be provided in various forms although the lattice structure 210 and the metamaterial structure 220 are formed on the base element in the ideal filter member 200.

Referring to Fig. 4, another type of filter member 202 may be formed as follows.

The other type of filter element 202 includes a base element 2022, a lattice structure 2024 provided on one side of the base element 2022, and a metamaterial structure 2026 provided on the other side of the base element 2022. [ . ≪ / RTI > At this time, one surface and the other surface of the base element 2022 face each other.

Thus, a lattice structure 2024 and a metamaterial structure 2026 are formed on both sides of the base element 2022, respectively, so that the lattice structure 2024 and the metamaterial structure 2026 can be disposed on different planes.

4 illustrates a case where a grid structure 2024 is provided on the upper surface of the base element 2022 and a meta material structure 2026 is provided on the lower surface of the base element 2022. However, It will be appreciated that a material structure 2026 may be provided and a lattice structure 2024 may be provided on the bottom surface of the base element 2022.

5, another form of the filter member 204 may be formed as follows.

The other type of filter element 204 may include a plurality of base elements 2042, a grid structure 2044 provided on one of the plurality of base elements 2042, And may include a meta-material structure 2046 provided therein.

The plurality of base elements 2042 may include a first base element 2042a and a second base element 2042b and the first base element 2042a may be provided with a lattice structure 2044, The meta-material structure 2046 may be provided on the first electrode 2042b.

At this time, the plurality of base elements 2042 may be spaced apart from each other.

Specifically, the plurality of base elements 2042 may be spaced from the opening surface 102 of the horn 100 by? / 3 or less.

For example, if the first base element 2042a is disposed coplanar with the opening surface 102, the second base element 2042b may be spaced less than? / 3 below the opening surface 102 have. Here, the distance between the plurality of base elements 2042 means the distance between the lattice structure 2044 and the metamaterial structure 2046, which may also affect the performance of the horn antenna 10.

The filter members 200, 202 and 204 may be provided in various shapes such as the mesh structures 210, 2024 and 2044 and the metamaterial structures 220, 2026 and 2046, The performance can be improved as follows.

frequency spirit Lattice structure Metamaterial structure Lattice + metamaterial S11 benefit S11 benefit Improving S11 benefit Improving S11 benefit Improving 10.7 -20.5 10.8 -12.3 10.8 0.0 -17.9 10.9 0.1 -18.5 11.4 0.6 11.2 -17.6 11.2 -11.9 11.5 0.3 -16.7 11.3 0.1 -17.5 11.8 0.6 11.7 -15.8 11.6 -10.8 12.0 0.4 -16.4 11.7 0.1 -15.4 12.5 0.9 12.2 -14.5 11.9 -9.7 12.4 0.4 -16.7 12.1 0.2 -13.6 12.9 1.0 12.7 -13.4 12.2 -9.0 12.5 0.3 -17.1 12.4 0.2 -12.9 13.1 0.9 -16.4 11.6 -10.7 11.8 0.3 -17.0 11.7 0.1 -15.6 12.3 0.8

As shown in [Table 3], in the case of only the lattice structure, the gain is somewhat improved as compared with the case where only the horn is present, but it is confirmed that the performance of S11 (reflection loss) is much lower. In addition, it can be seen that there is almost no change in gain and S11 (reflection loss) performance in the presence of only a horn when there is only a meta-material structure.

On the other hand, in the case of the filter member provided with the lattice structure and the meta-material structure, it is confirmed that the gain improvement is excellent and the S11 performance change is hardly changed compared with the case of only the horn.

The horn antenna 10 according to the embodiment can acquire a high gain without affecting the reflection loss by mounting the filter member 200 having the lattice structure and the metamaterial structure in the horn 100.

Referring again to FIG. 1, a low dielectric material 300 may be disposed within the horn 100 in the horn antenna 10 according to one embodiment.

The low dielectric material 300 may be formed of, for example, air or foam, and the filter material 200 may be disposed on the low dielectric material 300.

Thereby, the filter member 200 can be fixed adjacent to the opening surface of the horn 100, and the filter member 200 can be spaced apart from the inside of the horn 100.

Although the structure of the horn antenna 10 according to the above embodiment has been described, a method of manufacturing the horn antenna 10 according to the embodiment will be described below.

FIG. 6 is a flow chart showing a manufacturing method of a horn antenna according to an embodiment, FIG. 7 is a flowchart showing a step of manufacturing a filter member, FIG. 8 is a flowchart showing a step of manufacturing a filter member, Fig. 10 is a flowchart showing a step in which a filter member is manufactured. Fig.

Referring to FIG. 6, a horn antenna according to an embodiment can be manufactured as follows.

First, a horn for guiding electromagnetic waves incident or emitted through the opening surface is provided (S10), a filter member through which an electromagnetic wave is to pass is manufactured (S20), a low dielectric material is inserted into the horn (S30) (S40).

At this time, the filter member can be manufactured by various methods, and the following description will be made on the step of manufacturing the filter member.

Specifically, referring to FIG. 7, the lattice structure and the metamaterial structure on the same base element can be formed by a silk screen printing technique or a printing technique using conductive ink. This relates to the fabrication of the filter element 200 shown in Fig.

First, a base element provided with a plastic film is provided (S20a).

Subsequently, a sheet in which holes are formed to correspond to the lattice structure and the metamaterial structure is disposed on the base element (S20b). At this time, it is a matter of course that the sheet in which the hole is formed to correspond to the lattice structure and the sheet in which the hole is formed to correspond to the metamaterial structure can be stacked on the base element.

Then, a conductive ink made of a metallic material or a metallic material is rolled on the sheet (S20c).

Specifically, after a conductive ink made of a metal material or a metal material for forming a lattice structure is rolled on a sheet, a conductive ink made of a metal material or a metal material for forming a meta-material structure is rolled on a sheet, It is natural that the lattice structure and the metamaterial structure can be simultaneously formed by the conductive ink made of the material.

As a result, the lattice structure and the metamaterial structure can be formed on the same plane in the base element made of the plastic film, and the filter member can be manufactured by a relatively simple process, so that the production cost can be reduced.

8, a lattice structure and a metamaterial structure may be formed on different sides of the base element by a silk screen printing technique or a printing technique using conductive ink. This is related to the fabrication of the filter element 202 shown in Fig.

First, a base element provided with a plastic film is provided (S20d).

Subsequently, a first sheet having holes corresponding to the lattice structure is disposed on one surface of the base element (S20e), and a second sheet having holes corresponding to the metamaterial structure is disposed on the other surface of the base element (S20f) .

For example, a first sheet having a hole corresponding to a lattice structure is disposed on one of an upper surface and a lower surface of a base element, and a second sheet having a hole corresponding to the meta- And may be disposed on the other.

Then, a metallic material or a conductive ink composed of the metallic material is rolled on the first sheet or the second sheet (S20g).

Whereby a lattice structure and a metamaterial structure can be respectively formed on different surfaces in a base element provided with a plastic film.

Additionally, with reference to Fig. 9, the lattice structure and the metamaterial structure on different base elements can be formed by a silk screen printing technique or a printing technique using conductive ink. This relates to the fabrication of the filter element 204 shown in Fig.

First, a first base element and a second base element made of a plastic film are provided (S20h).

Subsequently, a first sheet having holes corresponding to the lattice structure is disposed on the first base element (S20i), and a second sheet having holes formed corresponding to the metamaterial structure is disposed on the second base element (S20j) .

Then, the conductive ink made of a metallic material or a metallic material is rolled on the first sheet or the second sheet (S20k).

Thereby, a lattice structure is formed on the first base element, and a meta-material structure can be formed on the second base element.

Herein, although the base element has been described as including the first base element and the second base element, the number of the base elements is not limited thereto, and the base element may be provided in a larger number than two It goes without saying that a portion of the lattice structure and metamaterial structure may be formed in the first base element and the remainder of the metamaterial structure may be formed in the second base element.

On the other hand, referring to FIG. 10, a lattice structure and a metamaterial structure may be formed on the base element by plating or etching.

First, a base element provided as a substrate is provided (S201).

The substrate may comprise, for example, a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

Then, a metal material is plated on the base element or the base element is etched (S20m) to correspond to the lattice structure and the metamaterial structure.

At this time, a lattice structure and a metamaterial structure may be formed on one side of the substrate, a lattice structure may be formed on one side of the substrate, and a metamaterial structure may be formed on the other side of the substrate. It is a matter of course that a lattice structure is formed in one of the plurality of substrates and a metamaterial structure is formed in the other of the plurality of substrates.

The method of manufacturing the horn antenna and the horn antenna according to an embodiment of the present invention may be variously embodied so that the lattice structure and the metamaterial structure of the filter member are formed in the same base element or different base elements, It is possible to easily manufacture by using a printing technique using ink, plating or etching, and the manufacturing cost can be reduced.

Although the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto without departing from the scope of the present invention. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

10: Horn antenna
100: Horn
102: opening sphere
200, 202, 204: filter member
2022, 2042: base element
210, 2024, 2044: Grid structure
212, 2026, 2046: transverse members
214: longitudinal member
220: Metamaterial structure
222: unit cell
300: low dielectric material

Claims (13)

A horn for guiding electromagnetic waves incident or emitted through the opening surface; And
A filter member disposed adjacent to the opening surface and through which the electromagnetic waves pass;
Lt; / RTI >
Wherein the filter member comprises:
Base element;
A grating structure provided on the base element to divide the opening surface; And
A metamaterial structure disposed in the section divided by the lattice structure;
/ RTI >
A low dielectric material is disposed in the horn,
And the filter member is disposed on the low dielectric material.
The method according to claim 1,
The size of the opening surface is formed to be larger than the wavelength? Of the electromagnetic wave,
And the size of the section divided by the lattice structure is equal to or larger than 0.5 lambda.
The method according to claim 1,
Wherein the meta material structure includes at least one unit cell made of a metal material and the size or arrangement interval of the unit cells is equal to or smaller than? / 4.
delete The method according to claim 1,
Wherein the base element comprises a plastic film, a PCB or FPCB,
Wherein the lattice structure or the meta material structure is formed on the base element by a silk screen printing technique, a printing technique using conductive ink, plating or etching.
A horn for guiding electromagnetic waves incident or emitted through the opening surface; And
A filter member disposed adjacent to the opening surface and through which the electromagnetic waves pass;
Lt; / RTI >
Wherein the filter member comprises:
Base element;
A grating structure provided on the base element to divide the opening surface; And
A metamaterial structure disposed in the section divided by the lattice structure;
/ RTI >
Wherein the lattice structure is provided on one surface of the base element,
Wherein the meta material structure is provided on the other surface opposite to one surface of the base element.
A horn for guiding electromagnetic waves incident or emitted through the opening surface; And
A filter member disposed adjacent to the opening surface and through which the electromagnetic waves pass;
Lt; / RTI >
Wherein the filter member comprises:
Base element;
A grating structure provided on the base element to divide the opening surface; And
A metamaterial structure disposed in the section divided by the lattice structure;
/ RTI >
A plurality of base elements are provided,
Wherein the base element comprises:
A first base element having the lattice structure; And
A second base element spaced apart from the first base element and having the meta-material structure;
/ RTI >
And the distance between the first base element and the second base element is less than? / 3.
Providing a horn for guiding electromagnetic waves incident or emitted through the opening surface;
Fabricating a filter member through which the electromagnetic wave passes;
Inserting a low dielectric material into the horn; And
Disposing the filter member on the low dielectric material;
Lt; / RTI >
Wherein the filter member is provided with a lattice structure and a meta material structure formed of a metal material.
9. The method of claim 8,
The step of fabricating the filter member through which the electromagnetic wave passes,
Providing a base element provided with a plastic film;
Wherein a sheet having a hole corresponding to the lattice structure and the metamaterial structure is disposed on one side of the base element; And
The conductive ink comprising the metallic material or the metallic material is rolled on the sheet;
Lt; / RTI >
Wherein the lattice structure and the metamaterial structure are formed on one surface of the base element.
9. The method of claim 8,
The step of fabricating the filter member through which the electromagnetic wave passes,
Providing a base element provided with a plastic film;
The first sheet having a hole corresponding to the lattice structure disposed on one side of the base element;
Placing a second sheet having holes corresponding to the meta material structure on the other side of the base element; And
The conductive ink comprising the metallic material or the metallic material is rolled on the first sheet or the second sheet;
Lt; / RTI >
Wherein the lattice structure is formed on one side of the base element and the meta-material structure is formed on the other side of the base element.
9. The method of claim 8,
The step of fabricating the filter member through which the electromagnetic wave passes,
Providing a first base element and a second base element provided in a plastic film;
Placing a first sheet having holes on the first base element to correspond to the lattice structure;
Placing a second sheet with holes corresponding to the meta material structure on the second base element; And
The conductive ink comprising the metallic material or the metallic material is rolled on the first sheet or the second sheet;
Lt; / RTI >
Wherein the lattice structure is formed on the first base element and the meta-material structure is formed on the second base element.
9. The method of claim 8,
The step of fabricating the filter member through which the electromagnetic wave passes,
Providing a base element provided as a substrate; And
A metal material is plated on or etched on the base element to correspond to the lattice structure and the metamaterial structure;
Wherein the horn antenna is formed of a metal.
9. The method of claim 8,
The size of the opening surface is formed to be larger than the wavelength? Of the electromagnetic wave,
The size of the partition divided by the lattice structure becomes 0.5? Or more,
Wherein a size or arrangement interval of the unit cells included in the meta material structure is equal to or smaller than? / 4.

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