KR102324394B1 - Antenna beam steering multiple layer structure - Google Patents

Abstract

The present invention relates to an antenna beam steering multilayered structure combined onto a surface part of a moving body so as to be opposed to a directional antenna placed in the surface part. The antenna beam steering multilayered structure includes: a first coupling part combined with the surface part such that one side is exposed to the outside; a second coupling part placed apart in an inward direction of the surface part to be combined with the surface part such that one side is opposed to the other side of the first coupling layer; and a steering layer placed between the first and second coupling layers such that a transmitted and received antenna beam can be steered. The steering layer includes a dielectric layer including a plastic dielectric, a metallic pattern and an RF element. Therefore, the antenna beam steering multilayered structure can improve the complexity of design as well as reduce maintenance costs and can improve quality through a reduction in the scattering of radio waves.

Description

ANTENNA BEAM STEERING MULTIPLE LAYER STRUCTURE

The present invention relates to a multi-layered antenna beam steering structure, and more particularly, to a multi-layered antenna beam steering structure coupled to a surface portion of a mobile body to steer an antenna beam transmitted/received from a directional antenna disposed therein.

All aircraft are equipped with an antenna to perform voice and data communication with the ground control station for safe flight of the aircraft. In general, aircraft are equipped with a pole-type antenna installed on the top of the tail wing for FM radio communication or the It is made in the same shape as a tail wing and uses a blade antenna attached to the rear of the aircraft.

In the case of an externally protruding antenna, if the aerodynamic characteristics are weakened or reduced, it can cause a risk to flight safety and combat power. Therefore, the pole or blade type antenna has a large effect on the aerodynamic characteristics because the antenna protrudes to the outside of the aircraft. By giving it cannot be free from the above-mentioned problems, durability also has a weak problem.

Recently, in order to solve these problems, a conformal antenna in the form of printing an antenna on an aircraft has been developed and used. At this time, since the conformal antenna has a form of replacing a part of the surface of the structure composed of a conductor with a radome and printing the antenna on the radome, it is difficult to match the antenna at the operating frequency due to low input impedance, and antenna radiation characteristics are lowered. have

Accordingly, in Korean Patent Publication No. 10-1092752 (“Conformal antenna structure for improving input impedance”), a technology for replacing a part of the surface of a structure composed of a conductor with a radome and printing an antenna on the radome is disclosed. has been To briefly describe the above technology with reference to FIG. 1, in the document, a conductor space for inserting the antenna is formed in the vertical pin 10 part of the aircraft, but the antenna insertion space part ( 20) is formed, and the antenna radiation unit 30 including the monopole antenna 31 and the dipole antenna 32 is printed on the radome 21 is disclosed.

However, although the above-mentioned problems of the prior art can be solved through the above technique, the conformal antenna has a disadvantage in that the complexity is high because the antenna is designed in consideration of the surface shape. In addition, the conformal antenna is vulnerable to the change in the characteristics of the antenna beam according to the surface change that occurs during the operation of the aircraft, and the maintenance cost is also excessively generated.

KR 10-1092752 B1 ("Conformal antenna structure for improving input impedance", 2011.12.09. Announcement)

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to provide an antenna beam steering multilayer structure used with a directional antenna to improve the complexity of antenna design considering the surface shape while easier maintenance will do

In order to achieve the above object, the present invention provides an antenna beam steering multilayer structure coupled on the surface portion to face the directional antenna disposed inside the surface portion of the movable body, wherein the surface portion is exposed to the outside. a first fastening layer coupled to; a second fastening layer disposed to be spaced apart in an inner direction of the surface portion so that one surface faces the other surface of the first fastening layer and coupled to the surface portion; and a steering layer disposed between the first fastening layer and the second fastening layer to steer the transmitted and received antenna beam, wherein the steering layer may include a dielectric layer including a plastic dielectric and a metallic pattern and an RF device. have.

In addition, the first fastening layer and the second fastening layer each have a hollow portion formed in the center thereof, a part of the steering layer is disposed on the hollow portion of the first fastening layer, and another portion of the steering layer is formed in the first fastening layer. It may be disposed on the hollow part of the two fastening layers.

The steering layer may include a first steering layer disposed on the hollow portion of the first fastening layer, a second steering layer disposed on the hollow portion of the second fastening layer, and the first steering layer and the second steering layer. A third steering layer may be disposed therebetween, wherein a diameter of the third steering layer may be larger than a diameter of the first steering layer or a diameter of the second steering layer.

In addition, the antenna beam steering multilayer structure of the present invention further includes a coupling member for fixing the first fastening layer, the second fastening layer and the steering layer to each other, and is inserted on the first fastening layer and the second fastening layer. A hole is formed, and a through hole is formed on the third steering layer, and the insertion hole and the through hole communicate with each other so that the coupling member can be inserted.

In addition, the antenna beam steering multilayer structure of the present invention further includes; a finishing layer covering and finishing the surface portion and the outer surface of the first fastening layer together, wherein the finishing layer is coated with a coating material or a film can be formed.

In addition, the first fastening layer or the second fastening layer is made of at least one of GFRP (Glass Fiber Reinforced Plastics), Quartz, PTFE (Polytetrafluoroethylene), rigid PU (Polyurethane) foam, PP (Polypropylene) foam, PS (Polystyrene) foam. may include.

In addition, the dielectric layer may include at least one of Quartz, PTFE, rigid PU foam, PP foam, and PS foam.

In addition, the steering element layer may include a conductive ink or a metallic pattern made of a copper thin film.

The antenna beam steering multilayer structure according to the present invention as described above is provided to change the characteristics of the beam without exposing the antenna and the radar to the exterior surface of the aircraft, so that the external exposure of the antenna element is dramatically reduced, thereby reducing the maintenance cost In addition, there is an advantage in that the maintenance procedure is simplified and the application stability is improved.

In addition, the antenna beam steering multilayer structure of the present invention can be used with broadband propagation characteristics, parasitic elements, meta-materials and material unit structures, etc., and has a high compatibility with existing installed directional antennas.

In addition, as the antenna beam steering multilayer structure of the present invention is continuously manufactured at the same position as the surface of the moving body, the aesthetic product finish is improved and the quality is improved, and the antenna characteristics by reducing the scattering of radio waves by the discontinuous surface It has the advantage of preventing the inhibition of

1 is a view showing a conformal antenna structure according to the prior art;
2 is a schematic diagram illustrating an antenna beam transmission system according to an embodiment of the present invention;
3 is a view showing an antenna beam steering multi-layer structure according to an embodiment of the present invention.
4 is a perspective view illustrating a steering layer according to an embodiment of the present invention;
5 is a view showing a multi-layered antenna beam steering structure including a paint layer according to an embodiment of the present invention.
6 is a view showing an antenna beam steering multi-layer structure according to another embodiment of the present invention.
7 is a view showing a method of installing an antenna beam steering multi-layer structure according to another embodiment of the present invention.

Hereinafter, an antenna beam steering multilayer structure according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Also, like reference numerals refer to like elements throughout.

If there is no other definition in the technical terms and scientific terms used at this time, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and the gist of the present invention is unnecessary in the following description and accompanying drawings Descriptions of known functions and configurations that may be blurry will be omitted.

2 to 5 relate to an antenna beam steering multi-layer structure according to an embodiment of the present invention, Figure 2 is a schematic diagram showing an antenna beam transmission system, Figure 3 is a cross-sectional view showing the antenna beam steering multi-layer structure, 4 is a perspective view illustrating a steering layer, and FIG. 5 is a cross-sectional view illustrating a multi-layered antenna beam steering structure including a paint layer.

Referring to FIG. 2 , the antenna beam steering multilayer structure 100 of the present invention may be formed on the surface portion 11 of a mobile body 10 such as an aircraft. In addition, a directional antenna 30 for transmitting and receiving radio waves in a direction toward the antenna beam steering multi-layered structure 100 may be disposed inside the movable body 10 with respect to the antenna beam steering multi-layered structure 100 . . In this case, the directional antenna 30 may transmit and receive radio waves to and from the ground station 20 , and in this case, the ground station 20 may have various types such as antennas or satellite antennas formed on other moving objects as well as antennas fixed on the ground.

Referring to FIG. 3, the antenna beam steering multilayer structure 100 of the present invention may be fixedly coupled to the hollow formed on the surface portion 11, and a first fastening layer 110, a second fastening layer ( 120 ) and a steering layer 130 . In this case, the outer surfaces of the first fastening layer 110 and the second fastening layer 120 may be fixedly coupled to the hollow inner surface of the surface portion 11 . Here, the inner and outer directions of the fastening layers 110 and 120 and the inner and outer directions of the movable body are divided, and the inner and outer directions of the movable body are defined as upper and lower sides.

The surface portion 11 has a constant thickness vertically, the outer surface of the first fastening layer 110 is coupled to the upper end of the inner surface of the surface portion 11, and the second fastening layer 120 is the The outer surface may be coupled to the lower end of the inner surface of the surface portion 11 . In addition, the first fastening layer 110 and the second fastening layer 120 are formed to be spaced apart from each other in the vertical direction to form a space therebetween, and the first fastening layer 110 and the second fastening layer 120 . The steering layer 130 may be fixedly coupled therebetween. In addition, the upper surface of the first fastening layer 110 may be formed to extend to the upper surface of the surface portion 11 , and when the surface portion 11 has a curvature, the upper surface of the first fastening layer 110 . may be formed in a shape extending from the corresponding curvature. Here, the first fastening layer 110 or the second fastening layer 120 is GFRP (Glass Fiber Reinforced Plastics), Quartz, PTFE (Polytetrafluoroethylene), rigid PU (Polyurethane) foam, PP (Polypropylene) foam, PS (Polystyrene) ) may include one or more materials of the foam, and may be the same as the material of the surface portion or may be configured to include the same material.

Referring to FIG. 4 , the steering layer 130 may be configured to steer a beam received by the directional antenna 30 or transmitted from the directional antenna 30 . In this case, the steering layer 130 may include a dielectric layer 131 including a plastic dielectric and a steering element layer 132 including a metallic pattern and an RF active element and an RF passive element. Here, the dielectric layer 131 may include one or more of Quartz, PTFE, rigid PU foam, PP foam, and PS foam. In addition, the steering element layer 132 may include a conductive ink or a metallic pattern made of a copper thin film. In addition, the dielectric layer 131 and the steering element layer 132 are composed of multi-layers and may be sequentially stacked and coupled, and the steering layer 130 is a parasitic element (director or reflector), metamaterial and unit structure arrangement, etc. It can be applied and applied, so it has the advantage that it can be used more widely. In addition, the dielectric layer 131 has an advantage in that the effect of the beam characteristic of the antenna can be minimized by applying a plastic dielectric having a low dielectric constant.

Referring to FIG. 5 , the antenna beam steering multilayer structure 100 of the present invention further includes a finishing layer 140 covering and closing the upper surface of the surface part 11 and the upper surface of the first fastening layer 110 together. may include At this time, the finishing layer 140 may be formed by painting a coating material or coating a film, and in addition to this, the upper surface of the surface portion 11 exposed to the outside through other well-known methods and the first fastening layer 110 . can finish the top surface of

6 and 7 relate to an antenna beam steering multi-layer structure according to another embodiment of the present invention, FIG. 6 is a cross-sectional view showing the antenna beam steering multi-layer structure, and FIG. 7 is an installation method of the antenna beam steering multi-layer structure, respectively. indicates.

Referring to FIG. 6 , the antenna beam steering multilayer structure 200 of the present invention is coupled to the hollow formed on the surface portion 11 of the movable body, the first fastening layer 210 and the second fastening layer 220 . , a steering layer 230 and a coupling member 240 may be included. In this case, the outer surfaces of the first fastening layer 210 and the second fastening layer 220 may be coupled to the upper and lower inner surfaces of the hollow of the surface part 11 , respectively. In addition, the first fastening layer 210 and the second fastening layer 220 may each have a hollow formed therebetween, spaced apart from each other by a predetermined distance in the vertical direction to form a space therebetween.

In the steering layer 230 , the upper first steering layer 230a is disposed on the hollow of the first fastening layer 210 , and the lower second steering layer 230b is the second fastening layer 220 . ), and a third steering layer 230c serving as a center may be disposed in a space between the first fastening layer 210 and the second fastening layer 220 . In this case, the first steering layer 230a, the second steering layer 240b, and the third steering layer 230c may be composed of a plurality of dielectric layers and steering element layers stacked and bonded to each other, and the first steering layer The upper surface of the 230a may be formed to be exposed to the outside. In addition, outer diameters of the first fastening layer 210 , the second fastening layer 220 , and the third steering layer 230c may correspond to the hollow inner diameter of the surface portion 11 , and the first steering layer 230a and An outer diameter of the second steering layer 230b may correspond to an inner diameter of each of the first fastening layer 210 and the second fastening layer 220 . Accordingly, the outer diameter of the third steering layer 230c may be larger than the outer diameters of the first steering layer 230a and the second steering layer 230b.

The coupling member 240 may be coupled such that the first fastening layer 210 , the second fastening layer 220 , and the steering layer 230 are fixed to each other. In this case, the coupling member 240 may be formed to penetrate the first fastening layer 210 , but penetrate through the outside of the third steering layer 230c and be inserted into the second fastening layer 220 . At this time, the coupling member 240 may have various shapes such as screws, bolts, rivets, etc., and when the head is formed, a larger hole may be formed on the first fastening layer 210 to insert the head.

Referring to FIG. 7-( a ), the method of installing an antenna beam steering multilayer structure according to the present invention may include fixing and coupling the second fastening layer 220 to the hollow on the surface portion 11 . . In this case, the second fastening layer 220 may include a second insertion hole 221 and a second hollow part 222 , and the outer surface of the second fastening layer 220 is the hollow lower end of the surface part 11 . It may be installed to be fixed to the inner surface.

Then, referring to FIG. 7-(b) , the method for installing the multilayered antenna beam steering structure according to the present invention may include installing the steering layer 230 on the second fastening layer 220 . . In this case, the second steering layer 230b may be inserted into the second hollow portion 222 of the second fastening layer 220 , and a through hole formed vertically through the outside of the third steering layer 230c. (H) may communicate with the second insertion hole 221 of the second fastening layer 220 . Here, according to the present invention, the steering layer 230 may be electrically connected to a separate electronic component, and the outer surface of the third steering layer 230c may be fixed to the inner surface of the hollow center of the surface portion 11 . .

Referring to FIG. 7-(c) , the method of installing an antenna beam steering multilayer structure according to the present invention may include fixing and coupling the first fastening layer 210 to the hollow on the surface portion 11 . . The first fastening layer 210 may be disposed in a space formed between the first steering layer 230a and the inner surface of the hollow upper end of the surface portion 11, and the first fastening layer 210 may 1 The surface portion 11 hollow and fixing operation may be additionally made. In this case, the first fastening layer 210 may also include a first insertion hole 211 and a first hollow part 212 , and the first insertion hole 211 may include the through hole H and a second insertion hole 212 . It communicates with the hole 221 and the first steering layer 230a may be disposed in the first hollow part 212 .

Referring to FIG. 7-( d ), the method of installing the multi-layered antenna beam steering structure according to the present invention may further include installing the coupling member 240 . In this case, the coupling member 240 may sequentially penetrate the first insertion hole 211, the through hole H, and the second insertion hole 221 that are in communication with each other. The upper end of the first insertion hole 211 may have a larger diameter so that the head may be inserted.

Referring to FIG. 7-( e ), in the method of installing the antenna beam steering multilayer structure according to the present invention, the surface portion 11 , the first fastening layer 210 and the first steering layer through the finishing layer 250 . It may include the step of finishing the upper surface of (230a) together. At this time, the finishing layer 250 may be formed by painting a coating material or coating a film as described above, and the present invention has the advantage of reducing the scattering of radio waves by discontinuous surfaces and preventing the deterioration of the directional antenna characteristics. There is this.

As described above, the present invention has been described with specific details such as specific components and limited embodiment drawings, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above one embodiment. No, various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all those with equivalent or equivalent modifications to the claims are said to be within the scope of the spirit of the present invention. will be.

H: through hole
10: movable body 11: surface part
20: ground station
30: directional antenna
100: antenna beam steering multi-layer structure
110: first fastening layer
120: second fastening layer
130: steering layer
131: dielectric layer 132: steering element layer
140: paint layer
200: antenna beam steering multi-layer structure
210: first fastening layer
211: first insertion hole 212: first hollow part
220: second fastening layer
221: second insertion hole 222: second hollow part
230: steering layer 230a: first steering layer
230b: second steering layer 230c: third steering layer
231: dielectric layer 232: steering element layer
240: coupling member
250: finishing layer

Claims (8)

In the antenna beam steering multilayer structure coupled on the surface portion to face the directional antenna disposed inside the surface portion of the movable body,
a first fastening layer coupled to the surface portion such that one surface thereof is exposed to the outside;
a second fastening layer disposed to be spaced apart in an inner direction of the surface portion so that one surface faces the other surface of the first fastening layer and coupled to the surface portion; and
a steering layer disposed between the first fastening layer and the second fastening layer to steer the transmitted and received antenna beam;
including,
The steering layer is
A dielectric layer including a plastic dielectric and a steering element layer including a metallic pattern and an RF element,
The first fastening layer and the second fastening layer have a hollow portion formed in the center of each,
The steering layer is
A first steering layer disposed on the hollow portion of the first fastening layer, a second steering layer disposed on the hollow portion of the second fastening layer, and a third steering layer disposed between the first steering layer and the second steering layer including a steering layer,
The antenna beam steering multilayer structure, characterized in that the diameter of the third steering layer is larger than the diameter of the first steering layer or the diameter of the second steering layer.
delete delete According to claim 1,
a coupling member for fixing the first fastening layer, the second fastening layer and the steering layer to each other;
further comprising,
Insertion holes are formed on the first fastening layer and the second fastening layer,
A through hole is formed on the third steering layer,
Antenna beam steering multilayer structure, characterized in that the insertion hole and the through hole communicate with each other to insert the coupling member.
According to claim 1,
a finishing layer covering and finishing the surface portion and the outer surface of the first fastening layer;
further comprising,
The finishing layer is an antenna beam steering multilayer structure, characterized in that it is formed by coating a coating material or coating a film.
According to claim 1,
The first fastening layer or the second fastening layer,
Antenna beam steering multilayer structure comprising at least one of GFRP (Glass Fiber Reinforced Plastics), Quartz, PTFE (Polytetrafluoroethylene), rigid PU (Polyurethane) foam, PP (Polypropylene) foam, and PS (Polystyrene) foam.
According to claim 1,
The dielectric layer is
Antenna beam steering multilayer structure comprising at least one of Quartz, PTFE, rigid PU foam, PP foam, and PS foam.
According to claim 1,
The steering element layer,
Antenna beam steering multilayer structure comprising a metallic pattern made of conductive ink or copper thin film.

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