KR20230132335A - Internal antenna and antenna assembly comprising the same - Google Patents

Abstract

The present embodiments include a radiating element that radiates or receives radio waves, a dielectric that is stacked and assembled on one surface of the radiating element, a ground located on the opposite side of the radiating element with the dielectric as the center, and a plurality of devices to compensate for deformation due to external force applied to the built-in antenna. We propose a built-in antenna characterized by including a feed assembly having a structure in which two connectors are connected.

Description

Internal antenna and antenna assembly comprising the same}

The present invention relates to a built-in antenna applied to the exterior of an aircraft and an antenna assembly including the same.

The content described in this section simply provides background information for this embodiment and does not constitute prior art.

Multiple protruding antennas applied to aircraft have the disadvantage of increasing the radar cross section (RCS), and if necessary, the design is changed to accommodate the need for attachment of additional protruding antennas during design. This becomes inevitable, and this may result in an extension of the development period.

In addition, the antenna-integrated structure uses a structure that surrounds the antenna through two sandwich cores so that the antenna is located at the center of the sandwich composite core, making it easy to assemble and preventing damage or destruction of the antenna from external shocks. It is implemented as a load-bearing structure. However, since the antenna is embedded in multiple components and various media, there is a problem that its function is deteriorated due to loss, refraction, and reflection of electromagnetic waves.

Embodiments of the present invention minimize and optimize the functional degradation of the antenna embedded in multiple media, provide a feeding structure that facilitates signal application and a stable signal against external deformation as an antenna in an antenna-integrated structure. There is a purpose.

Other unspecified objects of the present invention can be additionally considered within the scope that can be easily inferred from the following detailed description and its effects.

According to one aspect of this embodiment, the present invention provides a built-in antenna, comprising: a radiating element that radiates or receives radio waves; A dielectric layer assembled on one surface of the radiating element; A ground located on the opposite side of the radiating element with the dielectric as the center; and a power feeding assembly having a structure in which a plurality of connectors are connected to compensate for deformation due to an external force applied to the built-in antenna.

Preferably, the power feeding assembly includes: a first connector connected to the radiating element and the ground and exchanging an electrical signal with the radiating element; a second connector formed at a location spaced apart from the first connector and connected to a signal transmission cable to exchange the electrical signal; and an adapter that connects the first connector and the second connector and is implemented in a swiveling manner in which one axis is fixed and rotated.

Preferably, the first connector includes a connection protrusion that penetrates the dielectric and the ground and is connected to a feeding hole of the radiating element, and is assembled so that one side contacts the ground.

Preferably, the adapter compensates for misalignment due to structural deformation by moving fluidly in a direction perpendicular to the axis and the axis so that the first connector and the second connector are electrically connected. Do it as

Preferably, the radiating element includes a plurality of vias in at least one corner, and adjusts the strength and direction of a magnetic current generated in a corner that does not include the plurality of vias so that each magnetic current is It is characterized by forming the beam width through synthesis of the generated beam patterns.

Preferably, the radiating element is implemented in the form of a polygonal patch with at least six sides, and the radius of a circle circumscribed by the patch shape is inversely proportional to the center frequency of the built-in antenna.

Preferably, the radius (r) of the circle circumscribed to the patch shape, the speed of light (c), and the center frequency of the built-in antenna ( ), dielectric constant ( ) is characterized by satisfying the following equation.

[Equation]

Preferably, the radiating element includes a plurality of vias each formed on at least one side connected to each other; and a feeding hole formed at a position spaced apart from the plurality of vias, wherein the plurality of vias are formed to be symmetrical about one axis, and the spacing between the plurality of vias is constant. Built-in antenna.

Preferably, the number of vias formed on one side of the radiating element is at least greater than two and less than the value obtained by dividing the length of one side of the polygon by the diameter of the via.

Preferably, the distance (l) between the via formed on the one axis and the feeding hole is larger than half the diameter (d) of the via and smaller than the radius (r) of the circle circumscribed to the patch shape. do.

Preferably, the distance (l) between the via formed on the one axis and the feeding hole, the diameter of the via (d), the radius of the circle (r), and the correction constant (C) satisfy the following equation: It is characterized by

[Equation]

(Here, the correction constant (C) is 0.2 ~ 0.5 mm)

Preferably, the number of vias formed on one side of the radiating element is greater than at least two and is less than the value obtained by dividing the length of one side of the polygon by the diameter of the via.

According to another embodiment of the present invention, the present invention includes an upper layer implemented with the same external appearance as that of the fuselage; a first structural layer assembled at the bottom of the upper layer and formed to surround the top of the built-in antenna; a built-in antenna that is assembled at the bottom of the upper layer and radiates or receives radio waves to the outside through the upper layer; a second structural layer formed to surround a lower portion of the built-in antenna; and a lower layer coupled to the upper layer and formed to surround the first structural layer and the second structural layer surrounding the built-in antenna, wherein the built-in antenna includes: a radiating element that radiates or receives radio waves; A dielectric layer assembled on one surface of the radiating element; A ground located on the opposite side of the radiating element with the dielectric as the center; and an antenna assembly including a power feed assembly having a structure in which a plurality of connectors are connected to compensate for deformation due to external force applied to the built-in antenna.

Preferably, the power feeding assembly includes: a first connector connected to the radiating element and the ground and exchanging an electrical signal with the radiating element; a second connector formed at a location spaced apart from the first connector and connected to a signal transmission cable to exchange the electrical signal; and an adapter that connects the first connector and the second connector and is implemented in a swiveling manner in which one axis is fixed and rotated.

Preferably, the radiating element includes a plurality of vias in at least one corner, and adjusts the strength and direction of a magnetic current generated in a corner that does not include the plurality of vias so that each magnetic current is A beam width is formed through synthesis of generated beam patterns, and the radiating element includes: a plurality of vias each formed on at least one side connected to each other; and a feed hole formed at a position spaced apart from the plurality of vias, wherein the plurality of vias are formed to be symmetrical about one axis, and the spacing between the plurality of vias is constant. .

As described above, according to the embodiments of the present invention, the present invention has the effect of minimizing functional degradation and optimizing the function of the antenna embedded in the multiple medium.

Even if the effects are not explicitly mentioned here, the effects described in the following specification and their potential effects expected by the technical features of the present invention are treated as if described in the specification of the present invention.

1 is a diagram showing an antenna assembly including a built-in antenna according to an embodiment of the present invention.
Figure 2 is a diagram showing the internal configuration of a built-in antenna according to an embodiment of the present invention.
Figure 3 is a diagram showing the assembled shape of a built-in antenna according to an embodiment of the present invention.
4 and 5 are diagrams showing a patch-shaped radiating element of a built-in antenna according to an embodiment of the present invention.
Figure 6 is a diagram showing a power feeding assembly of a built-in antenna according to an embodiment of the present invention.
Figure 7 is a diagram showing compensation of a power feeding assembly of a built-in antenna according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely intended to ensure that the disclosure of the present invention is complete and to provide common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. The singular terms include plural expressions, unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Terms containing ordinal numbers, such as second, first, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

The present invention relates to a built-in antenna.

1 is a diagram showing an antenna assembly including a built-in antenna according to an embodiment of the present invention.

Referring to FIG. 1 , the antenna assembly 1 includes an embedded antenna 10, a first structural layer 20, a second structural layer 30, an upper layer 40, and a lower layer 50. The antenna assembly 1 may omit some of the various components exemplarily shown in FIG. 1 or may additionally include other components.

The antenna assembly 1 may be implemented as a conformal load-bearing antenna structure (CLAS). Specifically, the antenna assembly 1 is designed to be airframe-adaptive and can be designed and installed to fit the shape of the fuselage without protruding externally from the fuselage to which it is applied. Accordingly, the first structural layer 20, the second structural layer 30, the upper layer 40, and the lower layer 50 of the antenna assembly 1 are subject to detailed specifications such as shape and size under the condition of maintaining their purpose depending on the installation environment. It may change depending on.

Referring to FIG. 1, the antenna assembly 1 has a built-in antenna 10, a first structural layer 20, a second structural layer 30, an upper layer 40, and a lower layer 50 in which the external shapes are formed as straight lines. Although shown as being possible, it is not necessarily limited to this and may be implemented to form a curve according to the external shape of the fuselage to which it is applied.

The built-in antenna 10 may radiate or receive radio waves through the first structural layer 20 and the upper layer 40.

The built-in antenna 10 is a communication antenna module and may have a microstrip patch antenna shape.

The antenna-integrated structure uses a structure that surrounds the antenna through two internal structural layers so that the antenna is located at the center of the internal structural layer in the form of a sandwich composite, making assembly easy and preventing damage or breakage of the antenna from external shock. A panel-type load-bearing structure can be provided. At this time, as the antenna is embedded in multiple components and various media, functional deterioration may occur due to loss, refraction, and reflection of electromagnetic waves.

Accordingly, the built-in antenna 10 of the present invention minimizes and optimizes the functional degradation of the antenna embedded in the multiple medium, and provides a feeding structure that facilitates signal application to the antenna within the antenna-integrated structure and a stable signal against external deformation. You can.

The built-in antenna 10 is described in detail in FIG. 2 below.

The upper layer 40 may be implemented with the same external shape as that of the fuselage.

The upper layer 40 may be made of a material such as carbon fiber reinforced plastic (CFRP), glass fiber composite, ceramic composite, or low-loss dielectric material composite, but is not necessarily limited thereto.

The upper layer 40 is designed to have the same external shape without protruding from the skin of the aircraft, and is a layer in direct contact with the outside, allowing radio waves to pass through to be radiated or received to the outside.

The upper layer 40 may be implemented as a structure made of a non-conductive composite material that allows electromagnetic waves radiated from the built-in antenna 10 built in the antenna assembly 1 to be transmitted to the outside.

According to one embodiment of the present invention, the upper layer 40 may have a dielectric loss (loss tangent) of 0.001 to 0.1. At this time, the smaller the dielectric loss (loss tangent), the better, and if it is large, the loss may be large.

According to one embodiment of the present invention, the dielectric constant may be 1 to 10. At this time, if the dielectric constant exceeds 10, losses may occur due to refraction, rotation, and scattering. The smaller the dielectric constant, the better the straightness can be.

Dielectric constant is composed of dielectric constant and loss tangent.

The dielectric constant is related to the wavelength and propagation of electromagnetic waves. As the dielectric constant increases, the effective wavelength of the signal becomes shorter, allowing circuits or structures to be made smaller. Additionally, when the effective wavelength is short, diffuse reflection such as radio wave scattering is likely to occur.

Dielectric loss (loss tangent) is a factor that reduces the size of the signal, and the lower the loss tangent, the better. For example, the dielectric constant of air is 1, and since the dielectric constant of air is 1, the more similar the dielectric constant through which radio waves pass when radiating to air is better.

Equation 1 below represents the reflection coefficient.

In equation 1, represents the reflection coefficient, represents the transmittance, represents the dielectric constant.

The first structural layer 20 is assembled to the bottom of the upper layer 40 and may be formed to surround the upper part of the built-in antenna 10.

The first structural layer 20 may be implemented with a material such as a low-loss dielectric, but is not necessarily limited thereto.

The first structural layer 20 may be implemented as a structure configured to surround the top of the built-in antenna 10 to prevent it from being directly damaged by external shock or a load due to structural deformation of the antenna assembly 1.

The first structural layer 20 is separated from the second structural layer 30 to facilitate replacement in case of antenna performance deterioration or damage, and is separated from the second structural layer 30 to improve the radiation performance of the built-in antenna 10. may be implemented differently.

The first structural layer 20 can be made of a material that can protect against loads and external shocks, is easy to manufacture and process, and has excellent radio wave transmission characteristics.

According to one embodiment of the present invention, the first structural layer 20 is generally implemented with Polycarbonate (dielectric constant 1.1 to 3.0, loss 0.0003 to 0.001), Nylon 12 (dielectric constant 1.9 to 2.5, loss 0.015 to 0.08), etc. It can be, but is not necessarily limited to this.

The first structural layer 20 may be formed to surround the lower portion of the built-in antenna 10.

The first structural layer 20 may be implemented with a low-loss dielectric material, but is not necessarily limited thereto.

The first structural layer 20 may be implemented as a structure configured to surround the lower portion of the built-in antenna 10 to prevent it from being directly damaged by external shock or a load caused by structural deformation of the antenna assembly 1.

The second structural layer 30 may include a groove so that the built-in antenna 10 and the first structural layer 20 can be fastened.

According to an embodiment of the present invention, the first structural layer 20 and the second structural layer 30 may be implemented with a strength sufficient to withstand structural deformation.

The lower layer 50 is combined with the upper layer 40 and may be formed to surround the first structural layer 20 and the second structural layer 30 surrounding the built-in antenna 10.

The lower layer 50 may be made of a material such as CFRP (Carbon Fiber Reinforced Plastic), carbon fiber composite, etc., but is not necessarily limited thereto.

The lower layer 50 may be combined with the upper layer 40 to form a housing structure that surrounds the structure in which the first structural layer 20 and the second structural layer 30 are combined.

The lower layer 50 may be equipped with an RF connector so that transmission and reception signals can be transmitted from the built-in antenna 10.

The lower layer 50 may be made of a material such as carbon fiber reinforced plastic (CFRP), carbon fiber composite, etc., but is not necessarily limited thereto. The lower layer 50 may have a conductivity of 106 to 108. If the conductivity is less than a certain conductivity, it does not reflect and may cause noise such as refraction, scattering, or transmission. If the conductivity is greater than a certain conductivity, the weight There may be a problem with it becoming heavy.

CFRP has mechanical properties that make it light, strong, and easy to manufacture. Additionally, the electrical properties of CFRP may be a conductor material with relatively low conductivity.

The lower layer 50 may be formed so that the second structural layer 30 and the built-in antenna 10 are disposed on the inside, but is not necessarily limited thereto. For example, the lower layer 50 is formed to surround the lower side of the built-in antenna 10, which is assembled and fixed to the top of the second structural layer 30, and has a hole corresponding to the shape of the second structural layer 30 on the inside. This can be implemented so that the second structural layer 30 is formed and assembled.

The lower layer 50 can be made of a conductive material. The higher the conductivity, the better, but it can be made so as not to exceed a preset weight. For example, if the conductivity of the lower layer 50 is lowered to reduce weight, it may lose its conductive properties and generate noise such as refraction, scattering, or transmission.

According to one embodiment of the present invention, the built-in antenna 10 is assembled on the inside and can be protected from the outside while simultaneously realizing the same performance as an antenna formed outside the surface.

FIG. 2 is a diagram showing the internal configuration of a built-in antenna according to an embodiment of the present invention, and FIG. 3 is a diagram showing the assembled shape of the built-in antenna according to an embodiment of the present invention.

Referring to FIGS. 2 and 3 , the built-in antenna 10 may include a radiating element 100, a dielectric 200, a ground 300, and a power feeding assembly 400. The built-in antenna 10 may omit some of the various components exemplarily shown in FIGS. 2 and 3 or may additionally include other components.

The built-in antenna 10 is a communication antenna module and may have a microstrip patch antenna shape.

The radiating element 100 may radiate or receive radio waves.

The radiating element 100 includes a plurality of vias 110 in at least one corner, and adjusts the intensity and direction of magnetic current generated in corners that do not include the plurality of vias 110, The beam width can be formed through synthesis of the beam patterns generated by each magnetic stream.

The radiating element 100 is implemented in the form of a polygonal patch of at least six sides, with a plurality of vias 110 formed on at least one side connected to each other, and formed at a position spaced apart from the plurality of vias 110. It may include a feeding hole 120.

The radius of the circle circumscribed to the patch shape may be inversely proportional to the center frequency of the built-in antenna 10.

The radiating element 100 may be formed so that the plurality of vias 110 are symmetrical about one axis, and the spacing between the plurality of vias 110 may be constant.

The distance between the via 110 formed on one axis and the feeding hole 120 may be implemented to be smaller than the radius of a circle circumscribed to the patch shape and larger than the diameter of the via 110.

The number of vias formed on one side of the radiating element 100 may be greater than at least two and smaller than the length of one side of the polygon divided by the diameter of the via 110.

The dielectric 200 may be stacked and assembled on one surface of the radiating element 100. Specifically, the dielectric 200 may have a radiating element 100 assembled on the upper side, and a ground 300 may be assembled on the lower side.

The dielectric 200 may be implemented as a dielectric having a dielectric constant of 1 or more in order to reduce the physical size of the radiating element.

The ground 300 may be located on the opposite side of the radiating element 100 with the dielectric 200 as the center.

The ground 300 can generate an electric field between the radiating element 100 and the ground 300 to induce magnetic flow and reduce via wall (short pin) generation and backward radiation.

The power feeding assembly 400 may have a structure in which a plurality of connectors are connected to compensate for deformation due to external force applied to the built-in antenna 10.

The power feeding assembly 400 may be located on the opposite side of the dielectric 200 with the ground 300 as the center. Specifically, the power feeding assembly 400 is connected below the ground 300 and can transmit a signal that radiates radio waves to the radiating element 100 or receive received radio waves.

The power feeding assembly 400 includes a first connector 410, an adapter 420, and a second connector 430. The power feeding assembly 400 may omit some of the various components exemplarily shown in FIGS. 2 and 3 or may additionally include other components.

The first connector 410 is connected to the radiating element 100 and the ground 300, and can exchange electrical signals with the radiating element 100.

The first connector 410 connects the radiating element 100 and the adapter 420 and may provide a path through which electrical signals move.

The first connector 410 includes a connection protrusion that penetrates the dielectric 200 and the ground 300 and is connected to the feeding hole of the radiating element, and may be assembled so that one side contacts the ground.

The adapter 420 connects the first connector 410 and the second connector 430, and may be implemented in a swiveling manner in which one axis is fixed and rotated.

The adapter 420 moves fluidly in a direction perpendicular to the axis and the axis so that the first connector 410 and the second connector 430 are electrically connected, and can compensate for misalignment due to structural deformation. .

The second connector 430 is formed at a location spaced apart from the first connector 410 and is connected to a signal transmission cable to transmit and receive electrical signals.

Figure 4 is a diagram showing a patch-shaped radiating element of a built-in antenna according to an embodiment of the present invention. Figure 5 is a diagram showing a patch-shaped radiating element of a built-in antenna according to another embodiment of the present invention.

The radiating element 100 may be implemented in a patch shape, but is not necessarily limited thereto.

Referring to FIG. 4, the patch-shaped radiating element 100 may be implemented in a hexagonal shape. For example, the hexagonal patch-shaped radiating element 100 may be implemented so that vias 110 are located at the corners of two or more sides, and the vias 110 located at the corners of two or more sides may be formed to be connected to each other. .

The radiating element 100 positions a via wall at one or more corners of the patch shape to adjust the strength and direction of magnetic currents generated at corners where via walls do not exist, thereby synthesizing the beam pattern generated by each magnetic current. The patch shape can have various shapes in order to control the intensity and direction of the radiating element and magnetic current that allows it to have a wide beam width.

For example, the patch shape of the radiating element 100 may be implemented in a regular polygonal shape such as a hexagon or a bowtie shape, but is not necessarily limited thereto.

Referring to FIG. 5, the vias and feed holes according to the patch shape of the radiating element 100 will be described in detail.

Equation 2 below represents the radius (r) of the circle inscribed by the regular polygon.

In equation 2, c represents the speed of light, represents the antenna center frequency, represents the dielectric constant.

Equation 3 below represents the length of one side of a regular polygon.

In Equation 3, n represents the number of sides of a regular polygon, and the unit is mm.

Equation 4 below represents the number of vias on one side. Here, the number of vias indicates the number located on one side of a plurality of vias formed near the edge of a regular polygon.

In Equation 4, a represents the length of one side of a regular polygon, d represents the via diameter, and the unit is mm. Here, the length of one side of the regular polygonal shape can be calculated through Equation 3, and the diameter of the via represents the preset via diameter applied to the radiating element 100.

Equation 5 below represents the spacing between symmetrical vias and feed holes.

In Equation 5, l represents the distance between the via formed on the one axis and the feeding hole, d represents the diameter of the via, r represents the radius of the circle, C represents the correction constant, and the unit is mm .

According to one embodiment of the present invention, the correction constant (C) may be 0.2 to 0.5 mm. More preferably, the correction constant (C) may be 0.3 to 0.4 mm.

At this time, if the correction constant (c) is less than 0.2, a problem may occur where the electrical signal interferes between the via and the first connector assembled in the feed hole, and if it is greater than 0.5, the impedance matching is not done properly and the first connector A problem may arise in which the electrical signal transmitted from the device is not properly radiated by the radiating element.

Equation 6 below represents the number of sides where vias are located.

In the number of sides where vias are located, n is greater than 2.

According to one embodiment of the present invention, vias must be configured symmetrically about one axis, and the spacing between vias must be constant. Additionally, multiple vias must be configured on at least one edge of a polygon.

According to one embodiment of the present invention, the built-in antenna 10 adjusts the baton of the transmitted radio wave by arranging the via and feeding hole in the radiating element 100 with reference to the above-mentioned equations 2 to 6. Radio waves can be transmitted through and transmitted toward the target object.

Figure 6 is a diagram showing compensation of the first connector of the built-in antenna according to an embodiment of the present invention.

In an antenna-integrated structure, when using an extension cable or long-axis single connector to connect the built-in antenna to external communication equipment, there is a problem that it may be exposed to the risk of external deformation and damage. At this time, cables require a large space and a high height, and long-axis single connectors may break when structural load is applied.

Accordingly, the built-in antenna 10 of the present invention may include a power feeding assembly 400 applying a Swiveling type power feeding structure.

The power feeding assembly 400 may use a coupling connection structure using two connectors (inside/outside) and one adapter to connect the internal antenna to the outside of the antenna-integrated structure.

The power feeding assembly 400 can be implemented in an antenna-integrated structure to facilitate installation and detachment of the built-in antenna 10, and compensates for misalignment by applying a swivelable adapter between the internal connector and the external connector. This can be implemented to make this possible.

The power feeding assembly 400 is capable of maintaining resistance to external load and vibration compared to a long single connector. For example, it can be advantageous when applied to products that are resistant to vibration, such as helicopters and unmanned aerial vehicles.

According to one embodiment of the present invention, the power feeding assembly 400 may be assembled with an adapter 420 at the bottom of the first connector 410 and the top of the second connector 430, and the adapter 420 is connected to the first connector 410. It may be implemented to be assembled and fixed inside the connector 410 and the adapter 420.

The first connector 410 may form a connection protrusion of a certain length toward the top to be connected to the radiating element 100 so that signals can be exchanged with the radiating element 100. At this time, the connection protrusion may be formed with a length equal to the height of the dielectric 200 and the ground 300 so that the power feeding assembly 400 is assembled on the lower side of the ground 300 and comes into contact with the lower side of the radiating element 100. there is. Here, the dielectric 200 and the ground 300 may include a groove into which the connection protrusion is assembled, and the groove into which the connection protrusion is assembled may be implemented to be the same as the outer shape of the connection protrusion.

According to an embodiment of the present invention, the first connector 410 may be implemented as an SMP module, the adapter 420 may be implemented as a bullet module, and the second connector 430 may be implemented as an SMA module, and must be implemented accordingly. It is not limited.

Figure 7 is a diagram showing compensation of a power feeding assembly of a built-in antenna according to an embodiment of the present invention.

Conventional built-in antennas used long-axis single connectors, cable-type connectors, etc.

The long axis single connector is a single connector with a long length and has a small number of parts, but has the problem of being vulnerable to stress due to structural weakness due to the long length.

The cable-type connector can use two connectors and one cable, and the built-in antenna and lower layer can be separated. Cable-type connectors require consideration of cable placement and have the problem of increased signal loss.

Accordingly, the built-in antenna of the present invention can use the power feeding assembly 400 as a coupling type connector, which can use two connectors and one adapter.

The coupling-type connector can separate the built-in antenna 10 and the second face sheet 60.

Coupling-type connectors have the advantage of being swiveling and strain-free.

Accordingly, the built-in antenna 10 of the present invention uses a power feeding assembly 400 of a coupling type connector.

Referring to FIG. 7 , the power feeding assembly 400 includes a first connector 410, an adapter 420, and a second connector 430.

The first connector 410 may be implemented as a connector, but is not necessarily limited thereto. The first connector 410 may be implemented as a connector for transmitting a signal received from the outside by the radiating element to the adapter 420 or transmitting a signal received from the adapter 420 to the outside using the radiating element 100. .

The adapter 420 may be implemented as a bullet or adapter, but is not necessarily limited thereto. The adapter 420 serves to electrically connect connectors. It moves fluidly in the axial and radial directions and compensates for misalignment due to structural deformation to prevent electrical signals from being interrupted. there is.

The second connector 430 may be implemented as a lower layer connector, but is not necessarily limited thereto. The second connector 430 may transmit a signal received from the signal transmission cable to the adapter 420 or transmit a signal received from the antenna assembly 1 to the signal transmission cable through the adapter 420.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

1: Antenna assembly
10: Built-in antenna
100: Radiating element
200: dielectric
300: Ground
400: Power feeding assembly
20: first structural layer
30: second structural layer
40: upper floor
50: lower layer

Claims (15)

In the built-in antenna,
A radiating element that radiates or receives radio waves;
A dielectric layer assembled on one surface of the radiating element;
A ground located on the opposite side of the radiating element with the dielectric as the center; and
A built-in antenna comprising a power feed assembly having a structure in which a plurality of connectors are connected to compensate for deformation due to an external force applied to the built-in antenna. According to paragraph 1,
The power feeding assembly is,
a first connector connected to the radiating element and the ground, and exchanging electrical signals with the radiating element;
a second connector formed at a location spaced apart from the first connector and connected to a signal transmission cable to exchange the electrical signal; and
A built-in antenna that connects the first connector and the second connector and includes an adapter implemented in a swiveling manner in which one axis is fixed and rotated. According to paragraph 2,
The first connector is,
A built-in antenna comprising a connection protrusion that penetrates the dielectric and the ground and is connected to a feeding hole of the radiating element, and is assembled so that one side contacts the ground. According to paragraph 2,
The adapter is,
A built-in antenna, characterized in that misalignment due to structural deformation is compensated by fluidly moving in a direction perpendicular to the axis and the axis so that the first connector and the second connector are electrically connected. According to paragraph 1,
The radiating element is,
A beam that includes a plurality of vias in at least one corner, adjusts the strength and direction of magnetic currents generated in corners that do not include the plurality of vias, and synthesizes the beam patterns generated by each magnetic current. A built-in antenna characterized by forming a width. According to clause 5,
The radiating element is,
It is implemented in the form of a patch of at least a six-sided polygon,
A built-in antenna, characterized in that the radius of the circle circumscribed to the patch shape is inversely proportional to the center frequency of the built-in antenna. According to clause 6,
The radius (r) of the circle circumscribed to the patch shape, the speed of light (c), and the center frequency of the built-in antenna ( ), dielectric constant ( ) is a built-in antenna characterized by satisfying the following equation.
[Equation]
According to clause 6,
The radiating element is,
a plurality of vias each formed on at least one side connected to each other; and a feed hole formed at a location spaced apart from the plurality of vias,
A built-in antenna, wherein the plurality of vias are formed to be symmetrical about one axis, and the spacing between the plurality of vias is constant. According to clause 8,
The number of vias formed on one side of the radiating element is,
A built-in antenna that is larger than at least two and smaller than the length of one side of the polygon divided by the diameter of the via. According to clause 8,
The distance (l) between the via formed on the one axis and the feeding hole is,
A built-in antenna characterized in that it is larger than half the diameter (d) of the via and smaller than the radius (r) of the circle circumscribed to the patch shape. According to clause 10,
The distance (l) between the via formed on the one axis and the feeding hole, the diameter (d) of the via, the radius (r) of the circle, and the correction constant (C) satisfy the following equation: antenna.
[Equation]

(Here, the correction constant (C) is 0.2 ~ 0.5) In clause 7,
The number of vias formed on one side of the radiating element is,
A built-in antenna, characterized in that it is implemented to be larger than at least two and smaller than the value obtained by dividing the length of one side of the polygon by the diameter of the via. The upper layer is implemented with the same appearance as the fuselage;
a built-in antenna that is assembled at the bottom of the upper layer and radiates or receives radio waves to the outside through the upper layer;
a first structural layer assembled at the bottom of the upper layer and formed to surround the top of the built-in antenna;
a second structural layer formed to surround a lower portion of the built-in antenna; and
It is combined with the upper layer and includes a lower layer formed to surround the first structural layer and the second structural layer surrounding the built-in antenna,
The built-in antenna includes a radiating element that radiates or receives radio waves; A dielectric layer assembled on one surface of the radiating element; A ground located on the opposite side of the radiating element with the dielectric as the center; and an antenna assembly including a power feed assembly having a structure in which a plurality of connectors are connected to compensate for deformation due to an external force applied to the built-in antenna. According to clause 13,
The power feeding assembly is,
a first connector connected to the radiating element and the ground, and exchanging electrical signals with the radiating element;
a second connector formed at a location spaced apart from the first connector and connected to a signal transmission cable to exchange the electrical signal; and
An antenna assembly comprising an adapter that connects the first connector and the second connector and is implemented in a swiveling manner in which one axis is fixed and rotated. According to clause 13,
The radiating element is,
A beam that includes a plurality of vias in at least one corner, adjusts the strength and direction of magnetic currents generated in corners that do not include the plurality of vias, and synthesizes the beam patterns generated by each magnetic current. forming a width,
The radiating element is,
a plurality of vias each formed on at least one side connected to each other; and a feed hole formed at a location spaced apart from the plurality of vias,
An antenna assembly, wherein the plurality of vias are formed to be symmetrical about one axis, and the spacing between the plurality of vias is constant.

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