KR20200049507A - Omni Directional Antenna Apparatus for Vehicle - Google Patents

Abstract

Provided is an omni-directional antenna device for a vehicle capable of transmitting a signal within a predetermined reference angle range based on a vertical direction on a horizontal plane, which comprises: a biconical antenna (200) radiating signals in all directions on a horizontal plane (X-Y); a plurality of support members (250) spaced apart at a predetermined distance from the biconical antenna (200), respectively; and a plurality of directors (300) formed on each support member (250) and spaced apart from each other along a signal direction radiated in all directions on the horizontal plane (X-Y) centered on the biconical antenna (200).

Description

Omni Directional Antenna Apparatus for Vehicle}

The present invention relates to an antenna device, and more particularly, to an omni-directional antenna device.

A typical vehicle is equipped with an antenna for transmitting and receiving signals. In particular, recently, an antenna capable of transmitting and receiving signals in 5G (5G) mobile communication is mounted on a vehicle.

1 is a view showing the configuration of a typical 5G vehicle antenna system. As shown in FIG. 1, the 5G vehicle antenna system is composed of a modem, a signal transmission network, a phase shifter, and an array antenna. When a general 5G vehicle antenna system is operated, an omni-directional signal is configured through 4-section beam forming using an array antenna as a directional antenna as shown in FIG. 2. In this case, a configuration for beamforming is required, which complicates the system configuration and increases the error rate, and at least 41 points per section (90 °) to find the strongest radio wave in the beam tracking process for performing communication. There is a problem that must be scanned (scanning).

In addition, there is a problem that time delay occurs because the 5G vehicle antenna system must scan 164 points for omnidirectional scanning.

In addition, since the general 5G vehicle antenna system has a complicated configuration, the manufacturing cost of the antenna system is inevitably increased.

The present invention is to solve the above-mentioned problems, and its technical feature is to provide a vehicle omni-directional antenna device capable of transmitting a signal within a predetermined reference angle range based on a vertical direction on a horizontal plane.

In addition, the present invention is characterized in that it provides a vehicle omni-directional antenna device capable of transmitting signals in all directions on a horizontal plane.

In addition, the present invention has a technical feature of providing a vehicle omni-directional antenna device that can be used as a 5G vehicle antenna device without a beam tracking process.

In addition, the present invention is to provide a vehicle omni-directional antenna device having a short wavelength and attenuation size optimized for propagation in a band of 6 GHz (Sub 6) or 24 GHz or more (mmWave), which is a 5G frequency band, between a plurality of directors. do.

An omni-directional antenna device for a vehicle according to an aspect of the present invention for achieving the above object includes a biconical antenna 200 that radiates a signal in all directions on a horizontal plane (X-Y); A plurality of support members 250 spaced apart at a predetermined distance from the bicyclic antenna 200, respectively; And a plurality of directors 300 formed on each of the support members 250 and spaced apart from each other along a signal direction radiated in all directions on a horizontal plane XY centered on the bicyclic antenna 200. It is characterized by including.

According to the present invention, it is possible to transmit a signal within a predetermined reference angle range based on a vertical direction on a horizontal plane by installing a biconical antenna and installing a plurality of directors surrounding the biconical antenna. There is an effect that signals can be transmitted and received within an optimal angular range for transmission and reception.

In addition, since the present invention can transmit signals in all directions on a horizontal plane by using a biconical antenna, the signal reliability is improved, and the signal delay characteristics are excellent.

In addition, since the present invention uses a biconical antenna, a beam tracking process is not required in using as a 5G vehicle antenna device, and thus the system configuration is simple, resulting in low loss during signal transmission and beam tracking. There is an effect that the cost is reduced because no configuration is required.

In addition, the present invention has an effect that it is suitable for a vehicle 5G antenna system because the wavelength, which is a characteristic of radio waves in the 6 GHz (Sub 6) or 24 GHz or higher (mmWave) band, which is a 5G frequency band, is optimized for short and large attenuation characteristics.

1 is a view showing a conventional vehicle 5G antenna system.
2 is a view showing a conventional 5G antenna system for a vehicle constructing an omni-directional signal through beam tracking.
3A is a view showing an omni-directional antenna device for a vehicle according to an embodiment of the present invention.
3B is an exploded view of an omni-directional antenna device for a vehicle according to an embodiment of the present invention.
4 is a view showing a biconical antenna according to an embodiment of the present invention.
5 is a table showing an example of gain according to the spacing of a biconical antenna at a specific frequency.
6 is a view showing an example of a plurality of directors formed on a support member in a straight conductive pattern.
7A is a diagram showing the length of each director and the interval between each director according to an embodiment of the present invention.
7B is a table showing the length of each director and the interval between each director according to an embodiment of the present invention.
8 is a view showing an example of a plurality of directors formed on a support member in a curved conductive pattern.
9A is a perspective view showing that a first conductive pattern, a second conductive pattern, and a via hole line are formed on a support member.
9B is a view showing a first cross-section (I-I ') of the support member 250 having a first conductive pattern, a second conductive pattern, and a via hole line shown in FIG. 9A.
9C is a view showing a second cross section II-II 'of the support member 250 on which the first conductive pattern, the second conductive pattern, and the via hole line shown in FIG. 9A are formed.
10A is a perspective view showing that a first conductive pattern, a second conductive pattern, and a plurality of via hole lines are formed on a support member.
FIG. 10B is a view showing a first cross-section (I-I ') of a support member 250 having a first conductive pattern, a second conductive pattern, and a plurality of via hole lines shown in FIG. 10A.
FIG. 10C is a view showing a second cross section II-II 'of the support member 250 on which the first conductive pattern, the second conductive pattern, and the via hole line shown in FIG. 10A are formed.
11 is a view showing a hole formed in a housing according to an embodiment of the present invention.
12A is a diagram showing an example of a plan view of an electric field distribution formed by an antenna device.
12B is a view showing an example of a side view of an electric field distribution formed by an antenna device.
13 is a view showing a signal radiation pattern when the antenna device is installed in the vehicle.

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

The meaning of the terms described in this specification should be understood as follows.

It should be understood that a singular expression includes a plurality of expressions unless the context clearly defines otherwise, and the terms "first", "second", etc. are intended to distinguish one component from another component, The scope of rights should not be limited by these terms.

It should be understood that terms such as “include” or “have” do not preclude the existence or addition possibility of one or more other features or numbers, steps, actions, components, parts or combinations thereof.

It should be understood that the term “at least one” includes all possible combinations from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” means 2 of the first item, the second item, and the third item, as well as each of the first item, the second item, and the third item. Any combination of items that can be presented from more than one dog.

3A is a view showing an omni-directional antenna device for a vehicle (hereinafter referred to as an 'antenna device') according to an embodiment of the present invention, and FIG. 3B is an exploded view of an antenna device according to an embodiment of the present invention.

The antenna device 100 according to the present invention includes a biconical antenna (Biconical Antenna, 200), a plurality of support members (Printed Ciruit Board, 250), a plurality of directors (Director) 300, the housing 350, and the ground Plate 400 is included.

The biconical antenna 200 radiates a signal in all directions on a horizontal plane (X-Y). At this time, the biconical antenna 200 may emit a signal that is vertically polarized by forming an electric field perpendicular to the horizontal plane (X-Y).

In the present invention, since the biconical antenna 200 emits a signal in all directions on a horizontal plane (XY), there is no need to perform beam tracking, unlike a typical 5G vehicle antenna, and thus a configuration for beam tracking is not required. In addition, the signal loss generated in the beam tracking process is low, thereby improving the reliability of the signal.

Moreover, the present invention has an effect that a cost reduction effect is generated compared to an existing 5G vehicle antenna because no configuration for beam tracking is required.

일 수 있다. 이때, λ는 신호의 파장길이를 의미한다.In one embodiment, the biconical antenna 200 may be a half-wavelength antenna. When following these embodiments, the height of the biconical antenna

Can be At this time, λ means the wavelength length of the signal.

In one embodiment, the characteristic impedance of the biconical antenna 200 may be calculated according to Equation 1 below.

는 바이커니컬 안테나(200)의 특성임피던스이고,

는 바이커니컬 안테나(200)의 중심각을 의미한다.At this time

Is a characteristic impedance of the biconical antenna 200,

Denotes the central angle of the biconical antenna 200.

)을 산출할 수도 있다.예컨대, 안테나 특성 임피던스(

)가 50Ω 인 경우 수학식 1에 따라 바이커니컬 안테나(200)의 중심각(

)은 94°로 산출할 수 있다.Unlike the above-described embodiment, when the characteristic impedance of the antenna is set, the central angle of the biconical antenna 200 according to Equation (1)

), For example, the antenna characteristic impedance (

) Is 50Ω, the center angle of the biconical antenna 200 according to Equation (1)

) Can be calculated as 94 °.

In one embodiment, the input impedance of the biconical antenna 200 may be calculated according to Equation 2 below.

은 바이커니컬 안테나(200) 의 입력 임피던스를 의미하고,

는 바이커니컬 안테나(200)의 전송선로의 특성 임피던스를 의미한다.At this time,

Means the input impedance of the biconical antenna 200,

Denotes the characteristic impedance of the transmission line of the biconical antenna 200.

는 아래의 수학식 3에 따라 산출될 수 있다.At this time,

Can be calculated according to Equation 3 below.

는 바이커니컬 안테나(200)의 특성 임피던스를 의미하고,

는 바이커니컬 안테나(200)의 중심각을 의미한다. At this time

Is a characteristic impedance of the biconical antenna 200,

Denotes the central angle of the biconical antenna 200.

은 아래의 수학식 4에 따라 산출될 수 있다.In addition

Can be calculated according to Equation 4 below.

At this time, k is a wavelength constant and l is a hypotenuse of the biconical antenna 200.

Hereinafter, a biconical antenna 200 according to the present invention will be described in more detail with reference to FIG. 4.

4 is a view showing a biconical antenna according to an embodiment of the present invention.

The biconical antenna 200 includes a first canal 210, a second canal 212, and a feeding unit 214.

The first canal 210 is supplied with power from the feeding unit 214 to form an electric field according to the potential difference with the second canal 212 so that the signal can be radiated in all directions on the horizontal plane XY. .

The first canal 210 is formed in a conical shape, and a connection groove to which the feeding part 214 is connected is formed at the lower end of the first canal 210.

The second canal 212 is connected to the ground plate 400 to form an electric field with the first canal 210 so that signals can be radiated in all directions on the horizontal plane (X-Y). When following this embodiment, the ground plate 400 may be ground. Accordingly, the second canal 212 maintains the electric potential at zero, so that an electric field is formed according to a potential difference from the first canal 210 so that the signal can be radiated in all directions on the horizontal plane XY. have.

The second canal 212 is formed in a conical shape, and a transmission hole through which the feeding portion 214 passes is formed at an upper end. At this time, the transmission hole of the second canal 212 may be formed larger than the connecting groove of the first canal to pass through the feeding portion 214.

In one embodiment, the transmission hole of the second canal 212 may be formed with a fixing member to fix the feeding portion 214. At this time, the fixing member may be formed of a dielectric.

In one embodiment, the hypotenuse lengths of the first and second canals 210 and 212 may be calculated according to Equation 5 below.

At this time, A means the height of the biconical antenna 200, λ means the wavelength length of the signal, and l means the hypotenuse length.

일 때, 제1 커니컬 및 제2 커니컬(210, 212)의 빗변 길이는

로 산출될 수 있다.For example, the height of the biconical antenna 200

, The hypotenuse lengths of the first and second canals 210 and 212 are

Can be calculated as

In one embodiment, the spacing G between the first and second canals 210 and 212 may be within 0.1 mm to 2 mm. As an example, the interval G of the first and second canals 210 and 212 may be set to a length having a maximum gain.

For example, as illustrated in FIG. 5, the spacing G between the first and second canals 210 and 212 may be set to 0.75 mm with a maximum gain when the frequency is 28 GHz.

In one embodiment, the first and second canals 210 and 212 may be formed of copper (Cu).

The feeding unit 214 feeds power by supplying power to the first canal 210. Specifically, the feeding part 214 may pass through the transmission hole of the second canal 212 and be connected to the connection groove of the first canal 210 to supply power to the first canal 210 to supply power. .

Referring back to FIGS. 3A and 3B, the plurality of support members 250 may be disposed to be spaced apart from each other at a constant distance around the biconical antenna 200. At this time, the lower ends of the plurality of support members 250 are coupled to the ground plate 400 so that the plurality of support members 250 are installed in a first direction Z perpendicular to the horizontal plane X-Y. In one embodiment, the plurality of support members 250 may be a printed circuit board (PCB).

The plurality of support members 250 may be coupled to the housing 350. Specifically, the plurality of support members 250 may be coupled to a coupling groove formed in the housing 350. Accordingly, the support force of the plurality of support members 250 may be improved by the housing 350.

A plurality of directors 300 are formed on each support member 250. The plurality of directors 300 are spaced apart from each other along an imaginary straight line in the signal direction in all directions on the horizontal plane X-Y centering on the biconical antenna 200 on each support member 250.

The plurality of directors 300 may direct the direction in which the signal emitted by the biconical antenna 200 is radiated on the vertical plane in a direction within a predetermined reference angle.

For example, the plurality of directors 300 may direct the signal from 60 ° to 90 ° based on the first direction Z perpendicular to the horizontal plane X-Y.

In one embodiment, the plurality of directors 300 may direct a signal reflected in the first direction Z by the ground plate 400 in a direction of a predetermined reference angle. When following these embodiments, the plurality of directors 300 according to the present invention can improve the directivity of signals within a predetermined angle and are reflected and lost in the first direction Z by the ground plate 400. By reducing the signal, the transmission / reception sensitivity can be improved.

Accordingly, the present invention can transmit or receive a signal within an optimal angular range for transmitting or receiving a signal from a 5G mobile communication system.

In one embodiment, the plurality of directors 300 may be a conductive pattern of a straight type extending in a first direction Z perpendicular to the horizontal plane X-Y. For example, as illustrated in FIG. 6, the plurality of directors 300 may be a straight conductive pattern formed by extending in a first direction Z perpendicular to the horizontal surface XY on the support member 250. .

In FIG. 6, the plurality of directors 300 is shown as four, but this is only one example, and may be three or less and may be five or more.

In one embodiment, the length of the plurality of directors 300 may be determined by multiplying a first coefficient set for each director and a wavelength length of a signal emitted by the biconical antenna 200. At this time, at least one of the plurality of directors 300 may be different from the first coefficient.

In one embodiment, the length of the plurality of directors 300 may be shorter as the distance from the biconical antenna 200 increases. The length of the director 300 is important. When the director 300 is set to be longer than the height of the biconical antenna 200, the director 300 is operated as an extension coil. When the director 300 operates as a coil and has inductance, the electrical length becomes longer than that of the biconical antenna 200, thereby acting as a reflector. On the other hand, when the director 300 is set shorter than the height of the biconical antenna 200, the director 300 is operated as a capacitor. Since the director 300 is operated as a capacitor, the director 300 has a capacitive property, so that the electrical length is shorter than that of the bicyclic antenna 200, so that it acts as a waveguide without acting as a reflector to induce radio waves.

The reason that the lengths of the plurality of directors 300 according to the present invention are shorter as they move away from the bicyclic antenna 200 is that since the energy is attenuated sequentially when a signal is transmitted to each director, the directors have the same length. This is because when formed, the signal transmission efficiency gradually decreases as the reduced energy is transmitted.

In particular, since the signal in the 5G frequency band has a short wavelength and has large signal attenuation, it is designed in consideration of signal attenuation and even a minute portion not considered in the conventional antenna design.

For example, as illustrated in FIG. 7A, the plurality of directors 300 include a first director 310a, a second director 310b, a third director 310c, a fourth director 310d, and a fifth director ( 310e). At this time, the first to fifth directors 310a-310e are sequentially spaced apart from the biconical antenna. Accordingly, the first director 310a is positioned closest to the biconical antenna, and the fifth director 310e is positioned farthest from the biconical antenna.

When following this example, the first to fifth directors 310a-310e may be sequentially shortened in length.

For example, the lengths L1-L5 of the first to fifth directors 310a-310e may be set as shown in FIG. 7B. Specifically, the length L1 of the first director 310a is set to 0.45λ, the length L2 of the second director 310b is set to 0.44λ, and the length L3 of the third director 310c is Set to 0.43λ, the length L4 of the fourth director 310d is set to 0.4λ, and the length L5 of the fifth director 310e can be set to 0.32λ. At this time, λ means the wavelength length of the signal.

However, the lengths of the first director 310a and the second director 310b according to an embodiment of the present invention may be the same.

The reason that the lengths of the first director 310a and the second director 310b according to an example of the present invention may be formed to be the same is because the first director 310a and the second director 310b are biaxial antennas ( Because it is located close to 200) and the energy of the signal emitted from the biconical antenna 200 is large, even if the lengths of the first director 310a and the second director 310b are the same, signal attenuation can be ignored. to be.

When following this example, the length of each director 310a-310e may be formed as L1> L2> L3> L4> L5 or L1 = L2> L3> L4> L5.

On the other hand, a plurality of directors 300 are formed on each support member 250 to be spaced apart from the bidirectional antenna 200 in the outer direction.

The interval between the plurality of directors 300 may be determined by multiplying the second coefficient set for each director and the wavelength length of the signal.

In one embodiment, among the plurality of directors 300, the director 300 closest to the biconical antenna 200 may be positioned at a point where the energy of the signal radiated from the biconical antenna 200 is maximized. have. At this time, the point at which the energy of the signal is maximized may be a position spaced apart by 0.25λ of the signal emitted based on the uppermost end of the first canal 210 or the lowermost end of the second canal 212.

For example, as illustrated in FIGS. 7A and 7B, an interval Y between the first director 310a and the biconical antenna 200 may be 0.25λ.

The reason that the first director 310a according to the present invention is spaced by 0.25 λ from the biaxial antenna 200 is because 0.25 λ is the point where energy is maximized within one wavelength, the signal is the first director 310 a. This is because the energy transfer efficiency is the greatest when it is transferred to.

A plurality of directors 300 may be spaced by compensating for a length of a wavelength delayed as a signal passes through each director. For example, as illustrated in FIGS. 7A to 7B, the intervals X1-X4 between the first to fifth directors 310a-310e may be set to 0.31λ. Specifically, the interval X1 between the first director 310a and the second director 310b is 0.31λ, and the interval X2 between the second director 310b and the third director 310c is 0.31λ, and the third The interval X3 between the director 310c and the fourth director 310d is 0.31λ, and the interval X4 between the fourth director 310d and the fifth director 310e is 0.31λ.

When following this example, the spacing Y between the biological antenna 200 and the first director 310a may be narrower than the spacing X1-X4 between the plurality of directors 310a-310e (Y <X1 = X2 = X3 = X4).

As described above, according to the present invention, since each director is positioned at the point where the energy of the signal is maximized by compensating for the length of the delayed wavelength as it passes through each director, it is possible to maximize energy transfer efficiency.

In one embodiment, the plurality of directors 300 may be a conductive pattern of a curved type formed by bending toward the biconical antenna 200 at a predetermined curvature. For example, the plurality of directors 300 may be formed by bending the upper side of each director 300 toward the biconical antenna 200.

For example, as illustrated in FIG. 8, the upper sides of the plurality of directors 300 may be formed to be bent toward the biaxial antenna 200 at a predetermined curvature.

As an example different from the example illustrated in FIG. 8, the plurality of directors 300 may be formed by bending the lower side of each director 300 toward the biconical antenna 200 at a predetermined curvature.

As another example and another example illustrated in FIG. 8, the plurality of directors 300 may be formed by bending the upper and lower sides of each director 300 toward the biconical antenna 200 with a predetermined curvature.

The reason why the plurality of directors 300 according to the present invention is formed of a curved conductive pattern formed by bending at a predetermined curvature is a signal generated while being transmitted to the directors by implementing each director in the same curved shape as the wavelength shape of the signal This is to reduce the phase difference of. In particular, due to the large attenuation and low diffraction characteristics due to the signal characteristics of the 5G frequency band, it is designed in consideration of even a small portion that was not considered in the conventional antenna design.

 Accordingly, according to the present invention, since a plurality of directors 300 are formed of a curved conductive pattern formed by bending at a predetermined curvature, the phase difference of a signal generated while being transmitted to each director can be reduced, thereby increasing antenna efficiency.

In one embodiment, each director 300 may include a first conductive pattern, a second conductive pattern, and a via hole line. Here, the first conductive pattern may be formed on one surface of the support member 250, the second conductive pattern may be formed on the other surface of the support member 250, the via hole line is the first conductive pattern and the second conductive pattern Can be connected. At this time, the second conductive pattern may be formed in a region corresponding to the region where the first conductive pattern is formed.

When following this embodiment, the support member 250 in which each director 300 is formed may be a multi-layer printed circuit board (PCB) including multiple layers.

In one embodiment, the first and second conductive patterns may be straight-type conductive patterns, and in other embodiments, the first and second conductive patterns may be curved-type conductive patterns.

Hereinafter, a case in which each director 300 includes a first conductive pattern, a second conductive pattern, and a via hole line will be described in more detail with reference to FIG. 9.

9 is a diagram illustrating an example in which each director 300 includes a first conductive pattern, a second conductive pattern, and a via hole line. In FIG. 9, one director 300 is formed on the support member 250 for convenience of description.

9A is a perspective view showing that a first conductive pattern, a second conductive pattern, and a via hole line are formed on a support member.

9A, the first conductive pattern 320 is formed on one surface of the support member 250, and the second conductive pattern 330 is a support member corresponding to the region where the first conductive pattern 320 is formed. It may be formed on the other surface of (250). The via hole line 340 connects the first conductive pattern 320 and the second conductive pattern 330.

As such, the reason that the first conductive pattern 320 and the second conductive pattern according to the present invention are connected to the via hole line 340 is to form a single conductive pattern as a whole, so that it can be operated as one director 300. to be.

When each director 300 is composed of a first conductive pattern 320, a second conductive pattern 330, and a via hole line 340, each director 300 in a cross section as shown in FIGS. 9B and 9C Can be formed.

FIG. 9B is a view showing a first cross-section (I-I ') of the support member 250 having a first conductive pattern, a second conductive pattern, and a via hole line shown in FIG. 9A. 9C is a view showing a second cross-section II-II 'of the support member 250 on which the first conductive pattern, the second conductive pattern, and the via hole line shown in FIG. 9A are formed.

9A to 9C, the via hole line 340 is illustrated as being formed at the center of the first conductive pattern 320 and the second conductive pattern 330, but this is only one example, and the via hole line 340 is the first conductive pattern It may be formed on the upper side of the 320 and the second conductive pattern 330, or may be formed on the lower side of the first conductive pattern 320 and the second conductive pattern 330.

In addition, in FIGS. 9A to 9C, the first conductive pattern 320 and the second conductive pattern 330 are illustrated as straight conductive patterns, but this is only one example, and the first conductive pattern 320 and the second conductive pattern The pattern 330 may be formed of a curved conductive pattern.

In the above-described embodiment, it has been described that the via hole line 340 is one. However, in a modified embodiment, the via hole line 340 may be a plurality. When following such an embodiment, a plurality of via holes are formed in the support member 250, and the plurality of via hole lines 340 provide the first conductive pattern 320 and the second conductive pattern 330 through the plurality of via holes. Can be connected.

Hereinafter, a modified embodiment will be described in more detail with reference to FIGS. 10A to 10C.

10A is a perspective view showing that a first conductive pattern, a second conductive pattern, and a plurality of via hole lines are formed on a support member.

10A, the first conductive pattern 320 is formed on one surface of the support member 250, and the first conductive pattern 330 is a support member corresponding to the region where the first conductive pattern 320 is formed. It may be formed on the other surface of (250). Here, the plurality of via hole lines 340 connect the first conductive pattern 320 and the second conductive pattern 330. In this case, the first conductive pattern 320, the second conductive pattern 330, and the plurality of via hole lines 340 form a rod-shaped director 300.

This is to enable the first conductive pattern 320, the second conductive pattern, and the plurality of via hole lines 340 to form one conductive pattern as a whole, so that the first conductive pattern 300 can be operated.

As described above, when each director 300 is composed of a first conductive pattern 320, a second conductive pattern 330, and a plurality of via hole lines 340, each of the directors has a cross section as shown in FIGS. 10B and 10C. The director 300 may be formed.

FIG. 10B is a view showing a first cross-section (I-I ') of a support member 250 having a first conductive pattern, a second conductive pattern, and a plurality of via hole lines shown in FIG. 10A. FIG. 10C is a view showing a second cross-section II-II 'of the support member 250 on which the first conductive pattern, the second conductive pattern, and the via hole line shown in FIG. 10A are formed.

As such, the first conductive pattern 320, the second conductive pattern 330, and the plurality of via hole lines 340 form a rod-shaped director 300.

Referring back to Figures 3a and 3b, the housing 350 is formed in a form surrounding the bicyclic antenna, a plurality of support members 250 are coupled. To this end, the housing 350 may be formed with a plurality of coupling grooves for coupling the plurality of support members 250.

Accordingly, a plurality of support members 250 are coupled to a plurality of coupling grooves formed in the housing 350, thereby improving the fixing force of the plurality of support members 250.

In one embodiment, the housing 350 may be a dielectric. When following this embodiment, the wavelength length of the signal passing through the housing 350 is shortened, and the antenna device 100 can be miniaturized. At this time, the dielectric constant is 4 or less, and the loss tangent (Loss Tangent) is preferably 0.02 or less.

In one embodiment, the housing 350 may be formed with at least one hole. When following this embodiment, the biconical antenna 200 may be in contact with air through at least one hole.

11 is a view showing a hole formed in the housing 350 according to an embodiment of the present invention. The hole 360 formed in the housing 350 allows the biconical antenna 200 to contact the air so that the biconical antenna 200 can emit signals through the air.

In FIG. 11, one hole 360 is formed in the housing 350, but this is only an example, and two or more holes 360 may be formed.

In the housing 350, a conical groove formed in a conical shape in which the first canal 210 of the biconical antenna 210 is mounted is formed at the center upper side of the housing 350, and the second of the biconical antenna 210 is formed. A conical groove formed in a conical shape in which the canal 210 is mounted and inverted is formed at the lower center of the housing 350.

A through hole is formed in the center of the housing 350 to allow the feeding portion 214 of the biconical antenna 210 to pass through, and accordingly, the feeding portion 214 passing through the second mechanical 212 passes through. It can be connected to the first canal 210 through the hole.

A plurality of fixing grooves for fixing to the ground plate 400 are formed on the lower side of the housing 350, and a fixing member is inserted into the fixing plate from the ground plate 400 so that the housing 350 is fixed to the ground plate 400. Will be.

The housing 350 further includes a housing cover to fix the first canal 210 of the biconical antenna 200. A plurality of fixing holes for fixing with the housing 350 are formed on the housing cover, and a plurality of fixing grooves for fixing the housing cover are formed on the upper side of the housing 350. Accordingly, the fixing member passes through the fixing hole and is inserted into the fixing groove, so that the housing cover is fixed to the housing 350 and the first mechanical 212 of the biconical antenna 200 is fixed.

The ground plate 400 is coupled to the lower side of the biconical antenna 200 to support the biconical antenna 200. The ground plate 400 is coupled with a plurality of support members 250 centered on the bicyclic antenna 200. To this end, a plurality of coupling grooves are formed in the ground plate 400 for coupling a plurality of support members 250, and the plurality of coupling grooves are formed around a biconical antenna.

The ground plate 400 is formed with a plurality of fixing holes for fixing the housing 350, and a fixing member passes through the plurality of fixing holes so that the housing 350 is fixed.

The ground plate 400 reflects the signal emitted from the biconical antenna 200 in a first direction Z perpendicular to the ground plate 400. At this time, a plurality of directors 300 according to the present invention directs the signals reflected at the ground plate 400 at a predetermined reference angle.

  For example, the ground plate 400 reflects signals emitted from the biconical antenna 200, and a plurality of directors 250 reflect the reflected signals in a first direction Z perpendicular to the horizontal plane XY. It is directed to 60 ° to 90 ° based on. Since the 5G frequency band has a high frequency, the wavelength is short, and it tends to be reflected by the ground plate compared to the low frequency band. Accordingly, the plurality of directors 300 according to the present invention are reflected by the ground plate, and the radio waves directed upwards at 30 ° to 60 ° based on the first direction Z perpendicular to the horizontal surface XY are horizontal surfaces (XY). It is directed to 60 ° to 90 ° based on the first direction Z perpendicular to.

The antenna device 100 according to the present invention may form an electric field distribution as shown in FIGS. 12A and 12B. 12A is a view showing an example of a top view of an electric field distribution formed by the antenna device 100, and FIG. 12B is a view showing an example of a side view of an electric field distribution formed by the antenna device 100.

As shown in FIG. 12A, the signal is radiated in all directions on the horizontal plane XY by the biconical antenna 200, and the signal radiated by the biconical antenna 200 as shown in FIG. 12B is grounded. Reflected by the plate 400, the plurality of directors 250 are directed to 60 ° to 90 ° based on the first direction Z perpendicular to the horizontal plane XY.

In general, in the case of a 5G vehicle antenna, a signal is effectively transmitted and received at 60 ° to 90 ° based on a first direction Z perpendicular to the horizontal plane (X-Y). Accordingly, the present invention can improve the directivity of the signal from 60 ° to 90 ° based on the first direction Z perpendicular to the horizontal plane (X-Y), and thus have performance suitable for a 5G vehicle antenna.

In one embodiment, the ground plate 400 may be ground. Specifically, the ground plate 400 may be combined with the second mechanical 212 of the biconical antenna 200 to maintain the potential of the second mechanical 0.

Meanwhile, a modem (not shown, Modem) for modulating and demodulating a signal may be mounted on the ground plate 400. The modem modulates the signal and transmits it to the biconical antenna 200 or demodulates the signal received from the biconical antenna 200 and transmits it to another system.

As described above, the ground plate 400 according to the present invention is connected to the modem and the biconical antenna 200.

In the 5G antenna system, when the modem is connected to the biconical antenna 200 through an RF cable, signal attenuation is large due to the characteristic of 5G frequency. However, the present invention can be specialized in the 5G antenna system because the ground plate 400 can reduce the signal attenuation due to the 5G frequency characteristic by connecting the modem and the biconical antenna 200.

In one embodiment, the antenna device 100 according to the present invention may be installed in a vehicle. Specifically, the antenna device 100 may be installed in the roof of the vehicle. When following this embodiment, the ground plate 400 of the antenna device 100 may be installed and fixed to the roof exterior panel of the vehicle.

To this end, the ground plate 400 is composed of an engaging protrusion that is inserted into and fixed to the installation groove provided in the roof exterior panel, or is composed of an adhesive surface that is attached to the roof exterior panel of the vehicle through an adhesive member, or a fixed member such as a screw is inserted It can be made of a coupling groove or the like bonded to the roof exterior panel of the vehicle through the fixing member.

When the antenna device 100 according to the present invention is installed in a vehicle, a radiation pattern may be formed as shown in FIG. 13.

13 is a view showing a signal radiation pattern when the antenna device is installed in the vehicle. As shown in FIG. 13, the antenna device 100 according to the present invention shows an emission pattern suitable for use as a 5G antenna because an electric field is always formed omnidirectionally around a vehicle.

The above-described embodiment is only one embodiment, and the antenna device 100 according to the present invention may be installed in a horizontally moving vehicle such as a ship, and may be used in a relay device such as an access point (AP). have.

The antenna device 100 according to the present invention improves the directivity within a predetermined reference angle based on a first direction Z perpendicular to the horizontal plane XY by radiating a signal radiated in all directions on the horizontal plane XY. In transmitting and receiving signals of a mobile communication system, not only is the signal delay characteristic excellent, but the signal reliability is improved.

In addition, the antenna device 100 according to the present invention can reduce cost by transmitting and receiving signals with improved directivity by a plurality of directors 300 without using a configuration for beam tracking, as well as simplifying system configuration, thereby reducing signal transmission. There is an effect that the generated loss is low and the energy efficiency is improved.

Those skilled in the art to which the present invention pertains will understand that the above-described present invention can be implemented in other specific forms without changing its technical spirit or essential features.

Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. do.

100: omni-directional antenna device for vehicles 200: bicyclic antenna
210: first canal 212: second canal
214: feeding portion 250: a plurality of support members
300: a plurality of directors 320: a first conductive pattern
330: second conductive pattern 340: via hole line
350: housing 400: ground plate

Claims (15)

A biconical antenna 200 emitting a signal in all directions on the horizontal plane XY;
A plurality of support members 250 spaced apart at a predetermined distance from the bicyclic antenna 200, respectively; And
A plurality of directors 300 formed on the support members 250 and spaced apart from each other along a signal direction radiated in all directions on a horizontal plane XY centered on the bicyclic antenna 200 is included. Omnidirectional antenna device for a vehicle, characterized in that. According to claim 1,
The plurality of directors 300
It is formed on each support member 250, the omni-directional antenna device for a vehicle, characterized in that spaced apart from the bidirectional antenna 200 in the outer direction. According to claim 1,
The plurality of directors 300,
A vehicle omni-directional antenna device, characterized in that the direction in which the signal is radiated is directed at 60 ° to 90 ° based on a first direction (Z) perpendicular to the horizontal plane (XY). According to claim 1,
The plurality of directors 300 is a non-directional antenna device for a vehicle, characterized in that a straight type conductive pattern formed extending in a first direction (Z) perpendicular to the horizontal plane (XY). According to claim 1,
The plurality of directors 300 is a non-directional antenna device for a vehicle, characterized in that the upper end of each director 300 is a curved type of conductive pattern formed by bending toward the biaxial antenna 200 with a predetermined curvature. According to claim 1,
Each director 300,
A first conductive pattern 320 formed on one surface of the support member 250;
A second conductive pattern 330 formed on the other surface of the support member 250 corresponding to the region where the first conductive pattern 320 is formed; And
And a via-hole line (340) connecting the first conductive pattern (320) and the second conductive pattern (330). The method of claim 6,
The first conductive pattern 320 and the second conductive pattern 330 is a non-directional antenna device for a vehicle, characterized in that any one of a straight type of conductive pattern and a curved type of conductive pattern. According to claim 1,
The length of the plurality of directors 300 is formed to be shorter as it is farther from the bicyclic antenna 200,
Of the plurality of directors 300, the length of the first director 310a closest to the biaxial antenna 200 and the length of the second director 310b closest to the first director 310a are the same. Vehicle omnidirectional antenna device. According to claim 1,
For the vehicle, characterized in that the first director closest to the bicyclic antenna 200 among the plurality of directors 300 is positioned at a point where the energy of the signal is maximized from the bicyclic antenna 200. Omnidirectional antenna device. The method of claim 9,
The first director is located spaced apart by 0.25λ from the biconical antenna 200,
Wherein λ is a vehicle omni-directional antenna device, characterized in that the wavelength length of the signal. According to claim 1,
Further comprising a housing 350 formed in a form surrounding the bicyclic antenna 200,
The housing 350 is formed with a plurality of coupling grooves to which the plurality of support members 250 are coupled, with the biconical antenna 200 as the center,
The plurality of support members 250 are omni-directional antenna device for a vehicle, characterized in that each coupled to the plurality of coupling grooves. The method of claim 11,
The housing 350 is a non-directional antenna device for a vehicle, characterized in that at least one hole (360) is formed for contacting the biconical antenna (200) with air. The method of claim 11,
The housing 350 is a vehicle omni-directional antenna device, characterized in that the dielectric having a predetermined dielectric constant. According to claim 1,
An omni-directional antenna device for a vehicle, characterized in that it further comprises a ground plate (400) coupled to the lower side of the bicyclic antenna (200) to support the bicyclic antenna (200). The method of claim 14,
The ground plate 400 is a vehicle omni-directional antenna device, characterized in that the ground (Ground) to which the bicyclic antenna 200 is connected.

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