KR101992620B1 - The Antenna with High Gain and Omni-Directional characteristics - Google Patents

Abstract

The present invention relates to a high-gain omnidirectional antenna. According to the present invention, the high-gain omnidirectional antenna is formed by combining an antenna substrate part with a feeding substrate part. The feeding substrate part includes a feeding line and an earthing pattern. The antenna substrate part, formed by stacking a plurality of substrates, includes: conductive radiation patterns formed on one side of each of the substrates; and a feeding via hole electrically connecting the conductive radiation patterns by vertically penetrating the antenna substrate part, and having an end connected to the feeding line of the feeding substrate part. Therefore, according to the present invention, the high-gain omnidirectional antenna satisfies the miniaturization of an antenna, and the omnidirectional radiation pattern property as well as the high-gain antenna property can make a communicable range relatively wide and its stack antenna structure can minimize the height of an antenna. Moreover, in any position of a terminal, a change in the performance of an antenna can be minimized.

Description

[0001] The present invention relates to a high gain omnidirectional antenna,

The present invention relates to a high gain omnidirectional antenna, and more particularly to a high gain omnidirectional antenna having an omnidirectional radiation pattern that can satisfy miniaturization of an antenna, can have high gain antenna characteristics, and has a wide communication range.

Background Art [0002] With the recent development of communication technologies, wireless communication devices that transmit and receive wireless signals have been rapidly becoming smaller, lighter, and more sophisticated.

In particular, most of the communication terminals are rapidly evolving from the existing second generation and third generation communication systems such as GSM, CDMA and WCDMA to the fifth generation communication system through the fourth generation LTE communication system. At the same time, (Global Positioning System), and WIFI (Wireless Fidelity).

Meanwhile, in order to support the latest 5th generation communication method in the case of communication terminals, various types of array antennas are designed. In addition, much efforts have been made to implement beam-forming using an array antenna designed to be a fifth-generation communication method. However, limitations of beam-tracking using an antenna, Due to the limitations of the beam-forming angles to be formed, there is a real difficulty in realizing a smooth communication range only by application of the array antenna.

Accordingly, there is an urgent need for an antenna designing technique that enables high-gain and omnidirectional radiation patterns to be formed by a single single antenna to enable a wider range of communication, and a variety of frequency bands are covered using a single antenna structure There is an increasing interest in a broadband antenna that operates by using an antenna.

In addition, when the omnidirectional antenna according to the related art is mounted on the terminal, since the height of the antenna itself is very large, and the distance from the metal surface of the terminal itself is required, There has been a problem in that it takes much time and effort to design an antenna in order to improve the gain of the antenna while maintaining an omnidirectional radiation pattern by a single antenna structure.

Accordingly, even when the antenna is mounted on the upper surface of the metal, the height at which the antenna is formed can be reduced, and the antenna characteristic can be high in all the resonance frequency bands, There is an urgent need for an antenna having an omnidirectional radiation pattern capable of a wide range of communication even if an additional technique such as beam-forming is not applied by forming a radiation pattern.

Patent Document 1: Korean Patent Registration No. 10-1155715 June 05, 2012 (Registration Date of Publication) Patent Document 2: Korean Registered Patent Application No. 10-1477985 Dec. 24, 2014 (registration date) Patent Document 3: Korean Patent Registration No. 10-1194370 Oct. 18, 2012 (registration date)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an antenna capable of designing an antenna at a very low height to satisfy miniaturization, It is an object of the present invention to provide a high gain omnidirectional antenna operable in a millimeter wave band as well as omnidirectional radiation pattern characteristics.

 In addition, the present invention can minimize the height of the antenna due to the laminated antenna structure in which a plurality of substrates are stacked and formed, and can even embed the antenna structure, Gain omnidirectional antenna with minimized gain.

In addition, the present invention can reduce the size of an antenna within a limited space by simultaneously using a monopole radiating element, which is an inverted conical conductor formed by a plurality of substrates to be laminated, as a radiating means and a power feeding means, Gain omnidirectional antenna capable of improving the antenna efficiency.

A high gain omnidirectional antenna according to an embodiment of the present invention is a high gain omni-directional antenna in which an antenna substrate portion and a power supply substrate portion are combined, wherein a feed line and a ground pattern are formed on the power supply plate portion, The substrate portion includes conductive radiation patterns formed on a surface of each of the plurality of substrates by stacking a plurality of substrates, electrically connected to the conductive radiation patterns vertically through the antenna substrate portion, And a feeding via hole connected to the feed line of the feeding substrate portion.

In a high gain omni-directional antenna according to an embodiment of the present invention, at least one of the conductive radiation patterns is formed to have a different size from at least one of the remaining conductive radiation patterns.

In a high gain omnidirectional antenna according to an embodiment of the present invention, the conductive radiation patterns are formed so as to have an inverted conical shape as a whole.

A high gain omnidirectional antenna according to an embodiment of the present invention includes at least one connection via hole formed through at least one of the plurality of substrates to electrically connect two radiation patterns out of the conductive radiation patterns And at least one of them.

In the high gain omnidirectional antenna according to the embodiment of the present invention, the number of connection via holes formed in at least one substrate among the plurality of substrates is different from the number of via holes formed in at least one substrate among the remaining substrates Is formed.

In a high gain omnidirectional antenna according to an embodiment of the present invention, the uppermost substrate of the antenna substrate portion may include at least one parasitic pattern formed at a predetermined distance from a conductive radiation pattern formed on one surface thereof, And a ground pattern formed on the ground pattern.

The high gain omnidirectional antenna according to an embodiment of the present invention may further include at least one grounding via hole passing through the antenna substrate portion, wherein one end of the grounding via hole is connected to the grounding pattern of the uppermost substrate, And is connected to a ground pattern of the power supply base portion.

A high gain omnidirectional antenna according to an embodiment of the present invention includes at least one connection via hole formed through at least one of the plurality of substrates to electrically connect two of the conductive radiation patterns And a high gain omnidirectional antenna

In a high gain omni-directional antenna according to an embodiment of the present invention, the conductive radiation pattern is circular and the parasitic pattern is ring-shaped.

As described above, the high gain omnidirectional antenna according to the present invention can satisfy the miniaturization of the antenna, and it has a relatively wide communication range due to omnidirectional radiation pattern characteristics as well as high gain antenna characteristics, There is an operable effect.

In addition, the present invention can minimize the height of the antenna due to the laminated antenna structure in which a plurality of substrates are stacked and formed, and even the buried structure is possible. Even if the mounting position is located at any position of the terminal, There is an effect that can be.

Further, the present invention can reduce the size of the antenna within a limited space by performing the function of the monopole radiating element, which is an inverted conical shaped conductor formed by connecting a plurality of stacked substrates by connecting via holes, as a radiating means and a power feeding means It is possible to reduce the size and improve the antenna gain.

1 is a diagram showing the overall configuration of a high gain omni-directional antenna according to a first embodiment of the present invention.
FIG. 2 is an exploded view of a laminated substrate having a radiation pattern forming an antenna substrate portion constituting the high-gain omni-directional antenna shown in FIG. 1. FIG.
FIG. 3 is an exploded view of a laminated substrate having only a dielectric layer forming an antenna substrate portion constituting the high-gain omni-directional antenna shown in FIG.
FIGS. 4 and 5 are views for explaining the substrate of the first layer among the substrates stacked in FIGS. 1 and 2. FIG.
Figs. 6 to 8 are views for specifically explaining the substrates of the second to fourth layers among the substrates laminated in Figs. 1 and 2. Fig.
FIG. 9 is a view showing a lower power supply substrate portion constituting the high gain omnidirectional antenna shown in FIG. 1. FIG.
10 is a view for explaining a power supply board unit constituting the high gain omni-directional antenna shown in Figs. 1 and 9. Fig.
11 is a diagram showing reflection loss characteristics of a high gain omni-directional antenna according to the present invention.
12A is a view showing radiation pattern characteristics of a high gain omni-directional antenna according to the present invention.
12B is a view showing a radiation pattern characteristic of a patch antenna according to the prior art for comparison with FIG. 12A.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

The high gain omnidirectional antenna according to the present invention is a high gain omnidirectional antenna having a very low height and a high gain by simultaneously using an inverted conical monopole radiating element formed of a multilayer (plural) As the antenna, the first frequency band and the second frequency band are formed within the range of 23.6 GHz to 28 GHz to operate in multiple bands.

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

FIG. 1 is a view showing the overall configuration of a high gain omnidirectional antenna according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a high gain omni-directional antenna, FIG. 3 is an exploded view of a laminated substrate having only a dielectric layer forming an antenna substrate portion constituting the high gain omnidirectional antenna shown in FIG. 1. FIG.

As shown in the figure, the high gain omnidirectional antenna according to the embodiment of the present invention includes an antenna substrate unit 100 in which a plurality of substrates are stacked to form a radiating element, A plurality of printed circuit boards 110, 120, and 120, which are stacked to form the antenna substrate unit 100, are formed of a single feeder plate 200 on which a coplanar waveguide with ground (CPWG) A feed via hole 300 is formed at the center of each of the antenna elements 130 and 140 (hereinafter referred to as a " substrate ") to feed a signal fed from the feeder plate portion 200 to the antenna substrate portion 100.

The antenna substrate unit 100 in which the plurality of substrates are stacked and the single feeder plate unit 200 are electrically connected to each other through the SMT process and conductive radiation Patterns are electrically connected through the conductive feeding via holes 300 and connected via holes 400 for electrically connecting the conductive radiation patterns formed on the plurality of substrates in a vertically penetrating manner, Each of the plurality of substrates may further include a ground via hole 600 connected to a ground plane of the feeder plate 200

The antenna substrate unit 100 includes a monopole radiating element 500 which is an inverted conical conductor formed by connecting a plurality of substrates 110, 120, 130 and 140 to be laminated, The monopole radiating element 500 of the inverted cone is fed with the feed signal through the feed via hole 300.

That is, a feed signal from a feed connector (not shown) is applied to the CPWG feeder line 700, and the monopole radiating element 500, which is an inverted conical conductor, is electrically connected to the CPWG feeder line 700 through a feed via hole 300 formed in the feeder line 700 And the metal pattern layers 111, 121, 131, and 141 of the metal thin film formed on the upper surface of the substrate of each layer to be laminated on the antenna substrate unit 100 from the monopole radiating element 500 of the inverted conical shape, Is applied.

A metal pattern layer 111, 121, 131, 141 formed as a metal thin film on an upper layer of each of the substrates 110, 120, 130, 140 stacked on the antenna substrate 100, A dielectric layer 112, 122, 132 (not shown) for supporting the dielectric layers 111, 121, 131, and 141 and maintaining a gap between the metal pattern layers 111, 121, 131, and 141 of the substrates 110, 120, And the substrate 110 has a structure in which a metal thin film layer is not formed under the dielectric layers 112, 122, 132, and 142.

The conductive radiation patterns 113, 123, 133, and 133 forming the inverted cone-shaped monopole radiating element 500 are formed in the central portions of the metal pattern layers 111, 121, 131, and 141 of the substrates 110, 120, 143,

 A feed via hole 300 for supplying a signal from the feeder plate 200 is formed at the center of each of the radiation patterns 113, 123, 133, and 143 as described above. On the other hand, in order to form the inverted cone-shaped monopole radiating element 500, the radiation patterns 113, 123, and 133 provided on the metal pattern layers 111, 121, and 131 of the substrates 110, The radiation patterns 113, 123 and 133 of the respective layer substrates 110, 120 and 130 are electrically connected to each other through the plurality of connection via holes 400 only in the upper layer substrate 140 Only the feed via hole 300 is formed without forming the connection via hole 400 on the radiation pattern 143 of the lower layer substrate 140 and the radiation pattern 133 of the metal pattern layer 131 directly above the lower layer substrate 140 The radiation pattern 143 of the lowermost layer substrate 140 is electrically connected through a plurality of connection via holes 400 formed in the lower layer substrate 140.

The spacing portions 115 are spaced apart from each other by a predetermined distance along the periphery of the radiation pattern 113 formed at the central portion of the metal pattern layer 111 of the uppermost substrate 110 among the plurality of substrates to be stacked A ring-shaped ground pattern 114 is formed. Therefore, the ground pattern 114 formed on the outer periphery of the radiation pattern 113 along the circumference of the circumference of the radiation pattern 113 is formed into a ring-shaped donut pattern. On the ground pattern 114, It is preferable to form the ground via holes 600.

The radiation pattern 113 and the ground pattern 114 are spaced apart from each other by a spacing 115 formed between the radiation pattern 113 and the ground pattern 114 at regular intervals along the circumference of the radiation pattern 113 and the ground pattern 114 Like parasitic pattern 116 formed on the surface of the semiconductor substrate 101.

The dielectric layers 112, 122, 132 and 142 forming the substrates 110, 120, 130 and 140 are formed in the feed via holes 300 formed at the center of the radiation patterns 113, 123, 133 and 143, The radiation patterns 113, 123, 133, and 143 are electrically connected to each other through the feed via holes 300 so as to be fed.

The dielectric layers 112, 122 and 132 supporting the metal pattern layers 111 and 121 and 131 are formed in the radiation patterns 113, 123 and 133 of the substrates 110 and 120, Only the feed via holes 300 are formed on the dielectric layer 142 of the lowermost layer substrate 140 without forming the connection via holes 400. In this case,

The dielectric layer 112, 122, 132, and 142 forming the substrate 110, 120, 130, and 140 are formed with a radiation pattern 113 formed on the metal pattern layer 111 on the substrate 110, The grounding pattern 114 is formed on the ground via hole 600,

According to a preferred embodiment of the present invention, each of the plurality of substrates 110, 120, 130, and 140 stacked on the upper metal pattern layer 111, 121, 131, And 143 are formed in a circular pattern, and the circular radiation patterns 113, 123, 133, and 143 are formed in different sizes.

A plurality of connection via holes 400 provided in the radiation patterns 113, 123, and 133 are electrically connected to the plurality of substrates 110, 120, and 130 to electrically connect the plurality of connection via holes 400, The monopole radiating element 500 formed by connecting the radiation patterns 143 is formed in a quasi-circular cone shape similar to an inverted cone shape.

Here, in order to form the inverted cone-shaped monopole radiating element 500, a plurality of connecting via holes 400 provided in the radiation patterns 113, 123, and 133 may be formed in each radiation pattern It is preferable that they are formed in different numbers. That is, in order to form the monopole radiating element 500 into a quasi-circular cone shape, the number of connection via holes 400 formed in each of the substrates 110, 120, The radiation patterns 123 and 133 are formed on the uppermost radiation pattern 113 having the largest area among the radiation patterns 113, 123, and 133, respectively.

According to another embodiment of the present invention, in order to form the monopole radiating element 500 into a quasi-circular cone shape, the radiation (not shown) formed on the substrate 110, 120, The number of connection via holes 400 provided in the patterns 113, 123, and 133 may be all the same.

According to another embodiment of the present invention, in order to form the monopole radiating element 500 into a quasi-circular cone shape, The connection via holes 400 are not formed on the radiation patterns 113, 123, 133, and 134 formed. Only the feed via holes 300 may be formed and the radiation patterns 113, 123, 133, and 134 formed on the respective layers of the substrates 110, 120, 130, and 140 may have different sizes. According to the present invention, the area of the radiation pattern gradually decreases from the uppermost substrate 110 to the lowermost substrate 140.

The monopole radiating element 500 of the inverted conical shape is formed by interconnecting a plurality of connection via holes 400 provided in the radiation patterns 113, 123 and 133 of the multi-layer substrates 110, 120 and 130, And the radiation pattern 143 of the lowermost layer substrate 140 is connected.

The plurality of substrates 150 may be formed of only a dielectric layer and may be disposed on the feed via holes 300. The plurality of substrates 150 may further include one or more additional substrates 150 under the plurality of substrates 110, And a ground via hole 600 are formed on the substrate 150 to support the plurality of substrates 100, 120, 130, and 140 formed on the substrate 150.

4 and 5 are views for explaining the substrate of the first layer which is the uppermost layer among the substrates stacked in Fig. 1 and Fig. 2, and Figs. 6 to 8 are views for explaining the substrate To the fourth layer are specifically described.

The high gain omnidirectional antenna according to the present invention will be described in more detail with reference to FIG. 4 to FIG. 8 as follows.

As shown in the figure, the high gain omni-directional antenna according to the embodiment of the present invention includes an antenna substrate unit 100 formed by stacking a plurality of substrates 110, 120, 130 and 140, The CPWG (Coplanar Waveguide with Ground) feeder line 700 is formed by a single feeder plate 200 that feeds a signal to the feeder plate 200 and feeds a feed signal from the feeder connector (not shown) The feeding signal is fed through the feeding via hole 300 formed in the antenna substrate unit 100. [

The first layer substrate 110 which is the uppermost layer in the antenna substrate portion 100 is formed of a dielectric layer 112 for supporting the upper metal pattern layer 111 and the metal pattern layer 111, A circular radiation pattern 113 is formed in the central portion of the metal pattern layer 111 and a conductive feeding via hole 300 for supplying a signal to the central portion of the radiation pattern 113 is formed, The power feed signal from the antenna 200 is electrically connected to the radiation pattern 113 of the antenna substrate unit 100 via the feed via hole 300 to be fed. A plurality of connection via holes 400 are radially formed on the center of the feeding via holes 300 on the radiation pattern 113.

A plurality of conductive connecting via holes 400 formed on the radiation pattern 113 of the metal pattern layer 111 of the first layer substrate 110 are formed on the lower layer of the first layer substrate 110, The radiation patterns 123 and 133 provided on the upper metal pattern layers 121 and 131 of the second to third layer substrates 120 and 130 are electrically connected to each other, The radiation pattern 143 provided in the radiation pattern 133 provided in the metal pattern layer 131 and the radiation pattern 143 provided in the upper metal pattern layer 141 of the fourth layer substrate 140 are electrically The monopole radiating element 500 having a quasi-circular cone shape is formed.

The first layer substrate 110 has a ring-shaped ground pattern 114 spaced apart from the first layer substrate 110 by spaced apart portions 115 formed at regular intervals along the outer circumference of the radiation pattern 113, A plurality of spacing portions 115 formed between the radiation pattern 113 and the ground pattern 114 at predetermined intervals along the circumference of the radiation pattern 113 and the ground pattern 114, Shaped parasitic pattern 116 formed on the substrate.

The second layer substrate 120 on the antenna substrate unit 100 is disposed directly below the first layer substrate 110 and includes an upper metal pattern layer 121 and a metal pattern layer 121, A circular radiation pattern 123 is formed at the central portion of the metal pattern layer 121 and a circular radiation pattern 123 is formed at the central portion of the metal pattern layer 121. In addition, A conductive feed via hole 300 for feeding a signal is formed in the center of the antenna substrate portion 123 and a radiation pattern 123 of the second layer substrate 120 of the antenna substrate portion 100 is formed through the feed via hole 300, And the feeder plate 200 are electrically connected to feed a feed signal.

A plurality of connection via holes 400 are radially formed on the feed via hole 300 formed at the center of the radiation pattern 123 on the radiation pattern 123 of the second layer substrate 120, A radiation pattern 113 formed at the central portion of the metal pattern layer 111 of the first layer substrate 110 through the connection via hole 400 and a radiation pattern 113 formed at the central portion of the metal pattern layer 121 of the second layer substrate 120 The pattern 123 is electrically connected.

The second layer substrate 120 includes a plurality of conductive connection via holes 400 radially formed on the radiation pattern 123 of the metal pattern layer 121 of the second layer substrate 120, The radiation pattern 133 provided on the upper metal pattern layer 131 of the three-layer substrate 130 is electrically connected.

The third layer substrate 130 in the antenna substrate unit 100 is disposed directly below the second layer substrate 120 and includes an upper metal pattern layer 131 and a metal pattern layer 131 A circular radiation pattern 133 is formed in the central portion of the metal pattern layer 131 and a circular radiation pattern 133 is formed in the central portion of the metal pattern layer 131, 133 are formed on the third layer substrate 130 and the second layer substrate 130 through the feed via holes 300 of the third layer substrate 130, Is electrically connected to feed a signal to be fed from the feeder plate 200.

A plurality of connection via holes 400 are radially formed on the radiation pattern 133 of the third layer substrate 130 about a feed via hole 300 formed at the center of the radiation pattern 133, The radiation pattern 123 formed at the central portion of the metal pattern layer 121 of the second layer substrate 120 through the connection via hole 400 and the radiation pattern 123 formed at the center portion of the metal pattern layer 131 of the third layer substrate 130 The pattern 133 is electrically connected.

The metal pattern layer 131 of the third layer substrate 130 is electrically connected to the radiation pattern 133 of the third layer substrate 130 through the plurality of conductive connection via holes 400 radially formed on the radiation pattern 133 of the metal pattern layer 131 of the third layer substrate 130. [ And the radiation pattern 143 provided on the upper metal pattern layer 141 of the fourth layer substrate 140 disposed under the third layer substrate 130 are electrically connected to each other.

The fourth layer substrate 140 on the antenna substrate unit 100 is disposed on the bottom surface of the third layer substrate 130 and includes the upper metal pattern layer 141 and the metal pattern layer 141 The fourth layer substrate 140 is formed of a dielectric layer 142 to support the third layer substrate 140 and is formed to correspond to the third layer substrate 130 with a predetermined gap therebetween. A conductive feed via hole 300 for feeding a signal is formed in the central portion of the antenna pattern portion 143 and the radiation pattern 143 and the antenna substrate portion 100 is formed through the feed via hole 300 of the fourth layer substrate 140, ) The radiation pattern 143 of the fourth layer substrate 140 is electrically connected to supply a feed signal from the feeder plate 200.

The radiation pattern 143 provided on the upper metal pattern layer 141 of the fourth layer substrate 140 may have a radiation pattern of the metal pattern layer 131 of the third layer substrate 130 133 and the plurality of conductive connection via holes 400 radially formed on the conductive connection via holes 400.

The common feed via holes 300 formed at the center points of the radiation patterns 113, 123, 133, and 143 of the first to fourth layer substrates 110, 120, 130, and 140 are electrically connected, The feeder signal is fed from the feeder plate 200 to each of the feeders 113, 123, 133,

The upper metal pattern layers 111, 121, 131, and 141 of the first to fourth layer substrates 110, 120, 130, and 140, which constitute the antenna substrate unit 100, The radiation patterns 113, 123, 133 and 143 are all connected to the feeding via holes 300 and the first to third layer substrates 110, 120 and 130 are electrically connected through a plurality of connection via holes 400 provided in the circular radiation patterns 113, 123 and 133 formed at the central portions of the upper metal pattern layers 111, 121 and 131, The radiation pattern 133 of the metal pattern layer 131 of the third layer substrate 130 is electrically connected to the radiation pattern 133 of the metal pattern layer 131 of the third layer substrate 130 through the plurality of conductive connection via holes 400 formed on the radiation pattern 133 of the three- The radiation pattern 143 provided on the upper metal pattern layer 141 of the fourth layer substrate 140 disposed under the third layer substrate 130 is electrically connected When viewed in gajeok it is formed in the shape similar to the reverse conical monopole radiating element 500 is made of a multi-layer substrate.

In order to form the inverted cone-shaped monopole radiating element 500, the upper metal pattern layers 111, 121, and 131 of the first to third layer substrates 110, 120, and 130 may be formed in accordance with a preferred embodiment of the present invention. The plurality of connection via holes 400 provided in the radiation patterns 113, 123, and 133 may be formed in different numbers for each radiation pattern. The number of connection via holes 400 formed in each of the substrates 110, 120 and 130 is formed on the uppermost radiation pattern 113 having the largest area among the radiation patterns 113, 123, and 133, And the number of the radiation patterns 123 and 133 in the lower part is gradually decreased.

That is, in order to form the inverted cone-shaped monopole radiating element 500, the number of the via holes 400 formed in the radiation pattern 113 of the first layer substrate 110 is larger than the number of the via holes 400 formed in the radiation pattern 113 of the first layer substrate 110 The number of the connection via holes 400 formed in the radiation pattern 123 is smaller than the number of the connection via holes 400 formed in the radiation pattern 123 of the second layer substrate 120, The number of connection via holes 400 formed in the radiation pattern 133 of the substrate 130 may be reduced so that the number of connection via holes 400 formed in the radiation pattern 113 of the first layer substrate 110, When the connection via holes 400 formed in the radiation pattern 133 are electrically connected to each other vertically downward, they are inclined progressively downward in the central axis direction to form a monopole (quasi-circular cone) shape similar to the inverted cone The radiating element 500 is formed.

According to another embodiment of the present invention, in order to form the monopole radiating element 500 into a quasi-circular cone shape, the first to third layer substrates 110, 120, 130 The number of connection via holes 400 provided in the radiation patterns 113, 123, and 133 may be the same.

According to another embodiment of the present invention, in order to form the monopole radiating element 500 into a quasi-circular cone shape, the first to fourth layer substrates 110, 120, 130, and 140 without forming the connection via hole 400 on the radiation patterns 113, 123, 133, and 134 formed on the respective layers. Only the feed via holes 300 are formed and the radiation patterns 113, 123, 133 and 134 formed on the respective layers of the first to fourth layer substrates 110, 120, 130 and 140 are formed to have different sizes . According to the present invention, the area of the radiation pattern gradually decreases from the first layer as the uppermost layer to the fourth layer as the lowermost layer, so that the shape of the monopole radiating element 500 is similar to that of the quasi-circular cone ).

As shown in FIG. 3, the substrate 110 may further include at least one substrate 150 below the plurality of substrates 110, 120, 130, and 140 to be laminated. A plurality of substrates 150-1, 150-2, 150-3, and 150-4 stacked under the plurality of substrates 110, 120, 130, Unlike the fourth layer substrate, the radiation pattern and the ground pattern are not present and only the dielectric layer is formed, and only the feed via hole 300 and the ground via hole 600 are formed, and the first to fourth layers The radiation pattern and the ground pattern formed on the substrates 110, 120, 130 and 140 are electrically connected to the CPWG feeder line 700 of the lower substrate 200 and the ground patterns 211 and 231. In addition, the substrate 150, which is formed of at least one dielectric layer alone, supports the stacked substrates 100, 120, 130, and 140 on which the inverted cone-shaped monopole radiating element 500 is formed .

FIG. 9 is a view showing a lower feeder plate constituting the high-gain omnidirectional antenna shown in FIG. 1, and FIG. 10 is a view for explaining a feeder board unit constituting the high-gain omni-directional antenna shown in FIGS. FIG.

As shown in the figure, the feeder plate 200 includes a metal thin film layer 210 as an upper layer, a dielectric layer 220 as an intermediate layer, and a metal thin film layer 230 as a lower layer.

The metal thin film layer 210 on the upper part of the feeder plate 200 and the metal thin film layer 230 on the lower layer are formed as ground planes 211 and 231 as ground planes, The radiation patterns 113, 123, 133 and 143 provided in the respective antenna elements 110, 120, 130 and 140 are connected to the conductive power feeding pattern 701 provided in the CPWG feeder line 700 of the lower feeding plate 200, Via a feed via hole (300) formed in the feed part (702).

The metal thin film layer 210 as the upper layer is composed of a ground pattern 211 as a ground plane and has a ground pattern 211 formed on the feed via hole 300 at the central portion and the metal thin film layer 230 of the lower layer on the ground pattern 211, And a ground via hole 600 connected to the ground electrode 231.

The dielectric layer 220 may include a feed via hole and a ground via hole at the same position as the feed via hole 300 and the ground via hole 600 formed in the upper metal thin film layer 210 ).

The metal thin film layer 230 as the lower layer is formed of a ground pattern 231 as a ground plane and is formed at the same position as the feed via hole 300 and the ground via hole 600 formed in the upper metal foil layer 210 And a CPWG feeder line 700 having a feed via hole 300 and a ground via hole 600 and to which a feed signal is applied by an external feed connector (not shown).

The CPWG feeder line 700 includes a feed pattern 701 having an impedance matched to the feed pattern 701 and a feed part 702 connected to an end of the feed pattern 701 to form feed via holes 300.

Therefore, when a feed signal is applied from the feed connector to the feed pattern 701 of the CPWG feeder line 700, the feed via hole 300 of the feed portion 702 formed at the end of the feed pattern 701, The monopole radiating element 500 of the inverted conical shape formed by connecting the radiation patterns provided on the antenna substrate portion 100 through the feed via holes 300 provided in the center portion of the ground pattern 211 of the thin film layer 210, (300) to feed the fed signal.

Meanwhile, the feeder plate 200 is spaced apart from the antenna substrate 100 by a predetermined distance. That is, the feeder plate part 200 is formed at a predetermined distance in the vertical direction below the antenna substrate part 100, and the antenna substrate part 100 is formed on the feeder plate part 200 And an inverted cone-shaped monopole radiating element 500 formed from the plurality of substrates 110, 120, 130, and 140 to be stacked.

That is, the feed signal applied through the CPWG feeder line 700 of the feeder plate 200 is formed at the end of the feed pattern 701 and the feed pattern 701 formed in the CPWG feeder line 700 Through the conductive feed via hole 300 formed at the center of the ground pattern 211 provided in the upper metal thin film layer 210 of the feeder plate portion 200 through the feeding via hole 300 of the feeding portion 702, A monopole radiating element 500 mounted on an upper part of the feeder plate part 200 and formed by conductive radiation patterns 113, 123, 133 and 143 formed on a plurality of substrates of the antenna substrate part 100, ) Via a conductive feeding via hole (300), and a power supply signal is applied.

The ground patterns 211 and 231 of the metal thin film layers 210 and 230 formed on the upper and lower layers of the feeder plate 200 are connected to the uppermost layer of the antenna substrate 100 through the ground via holes 600, The first layer substrate 110 is electrically connected to the ground pattern 114 provided on the metal pattern layer 111.

That is, a feeding via hole 300 is formed at the center of each of the circular conductive radiation patterns 113, 123, 133, and 143 formed on the plurality of substrates of the antenna substrate unit 100, and the feeding via hole 300 is formed The antenna substrate portion 100 and the feeder plate portion 200 are electrically connected to each other through the SMT process while being penetrated through the antenna substrate portion 100 and the antenna substrate portion 100 is electrically connected to the uppermost substrate 110 The ground pattern 114 formed on the metal pattern layer 111 and the ground patterns 211 and 231 formed on the feeder plate 200 form ground via holes 600, 100 and the feeder plate 200 are electrically connected to each other through the ground via holes 600 of the ground patterns 114, 211, and 231 through the SMT process.

Thus, in the high gain omnidirectional antenna according to the embodiment of the present invention, when a feed signal is applied from the feed connector to the feed pattern 701 of the CPWG feeder line 700 of the feeder plate 200, Resonance in the first frequency band is formed by the inverted cone-shaped monopole radiating element 500 having a multi-layer structure electrically connected through the feeding via hole 300 formed in the feeding part 702 from the feeding pattern 701 of the antenna 700, do.

At the same time, a feed signal is applied to a circular radiation pattern 113 formed on the upper surface metal pattern layer 111 of the first layer substrate 110 of the antenna substrate unit 100, And the ring-shaped parasitic patterns 116 spaced apart from each other by a predetermined spacing 115 along the periphery of the circular radiation pattern 113 are coupled and coupled to each other, Electromagnetic coupling is generated between the parasitic pattern 116 and the ground pattern 114 formed between the ground pattern 114 and the ground pattern 114 spaced apart from the ground pattern 116, Resonance of the second frequency band is formed by the current induced in the ground via hole (600) and the current concentrated in the ground via hole (600), thereby operating as an antenna having a dual band.

Here, a ring-shaped parasitic pattern 116 formed between the circular radiation pattern 113 and the ground pattern 114 has a ring-shaped spacing 115 formed at a predetermined distance from each other, Impedance matching is performed in multiple bands due to the coupling between the circular radiation pattern 113 and the ground pattern 114 and the spacing of the spacing portions 115 for impedance matching and the parasitic pattern 116 formed between the circular radiation pattern 113 and the ground pattern 114 The amount of inductance and capacitance can be varied to optimize the matching impedance.

Therefore, the high gain omnidirectional antenna according to the embodiment of the present invention includes the circular radiation pattern 113 and the parasitic pattern 116 formed on the upper surface metal pattern layer 111 of the antenna substrate unit 100, Shaped parasitic pattern 116 and the ground pattern 114 and the distance between the circular radiation pattern 113 and the ground pattern 114, The impedance matching in the first frequency band and the second frequency band, which are dual bands, can be achieved by the inductance and the capacitance components according to the number of the parasitic patterns 116 formed between the first and second frequency bands.

The high gain omnidirectional antenna according to the embodiment of the present invention is characterized in that a first frequency band formed by the monopole radiating element 500 having an inverted conical shape formed by the plurality of stacked substrates is formed by the parasitic pattern 116 Compared with the case where the antenna is matched with the second frequency band by the electromagnetic coupling and is operated with only the inverted cone type monopole radiating element 500, Directional radiation pattern covering a possible range.

Therefore, the high gain omnidirectional antenna according to the present invention can be realized by simultaneously using the inverted conical monopole radiating element 500 embodied as a multi-layer substrate as a radiating element and a feeding means of multi-band, There is an effect of providing an omnidirectional antenna.

11 is a diagram showing reflection loss characteristics of a high gain omni-directional antenna according to the present invention.

11, a high gain omnidirectional antenna according to an embodiment of the present invention has a return loss of -10 dB or less in an operating frequency band of 23.6 GHz to 28 GHz, which is a millimeter wave band, It is found that the reflection loss characteristic for operation is satisfactorily satisfied.

12A is a view showing a radiation pattern characteristic of a high gain omnidirectional antenna according to the present invention, and FIG. 12B is a view showing a radiation pattern characteristic of a patch antenna of the prior art for comparison with FIG. 12A.

As shown in FIGS. 12A and 12B, the radiation characteristics of a conventional patch antenna and an antenna according to the present invention are compared. The high gain omni-directional antenna according to an embodiment of the present invention basically has an operating frequency of millimeter And 5.58 dBi in the 28 GHz band, which is the wave band. This can provide higher antenna gain than that of the conventional conical monopole radiating element. In the case of the conventional patch antenna, the half power beamwidth ) Is about 78.8 degrees. In contrast, in the case of the high gain omnidirectional antenna according to the embodiment of the present invention, the half power beamwidth is about 92.6 degrees, so that a half power beamwidth of about 13 degrees or more is secured Since the antenna has an omnidirectional radiation pattern, the above-described results are obtained when the conventional patch antenna is operated only Which means that a wider communication range can be secured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is within the scope of the present invention that the component changes to such an extent as to cope evenly within a range that does not deviate from the present invention.

100: antenna substrate portion
(Or a printed circuit board) 110, 120, 130, 140, 150, 150-1, 150-2, 150-3,
111, 121, 131, 141: metal pattern layer
112, 122, 132, 142: dielectric layer
113, 123, 133, 143: radiation pattern
114: ground pattern 115:
116: parasitic pattern 200: feeder plate
210, 230: metal thin film layer 220: dielectric layer
211, 231: ground pattern 300: feeding via hole
400: connection via hole 500: monopole radiating element
600: ground via hole 700: feeder line
701: feeding pattern 702: feeding part

Claims (11)

A high gain omnidirectional antenna in which an antenna substrate portion and a feeder substrate portion are combined,
Wherein the feeder plate and the grounding pattern are formed on the feeder plate,
The antenna substrate portion includes conductive radiation patterns formed on a surface of each of the plurality of substrates by stacking a plurality of substrates, electrically connecting the conductive radiation patterns vertically through the antenna substrate portion, And a feeding via hole having one end connected to the feed line of the feeding substrate portion,
At least one of the conductive radiation patterns may be formed to have a different size from at least one of the remaining conductive radiation patterns such that the conductive radiation patterns are generally quasi-circular cones, And a high gain omnidirectional antenna
delete delete The method according to claim 1,
And at least one connection via hole formed through at least one of the plurality of substrates to electrically connect the two radiation patterns out of the conductive radiation patterns.
The method of claim 4,
Wherein the number of via holes formed in at least one substrate among the plurality of substrates is different from the number of via holes formed in at least one substrate among the remaining substrates,
The method according to claim 1,
At least one parasitic pattern formed at a predetermined distance from a conductive radiation pattern formed on one surface of the uppermost substrate of the antenna substrate unit;
And a ground pattern formed at a predetermined distance from the parasitic pattern. The high gain omni-directional antenna
The method of claim 6,
Wherein at least one grounding via hole is formed through the antenna substrate portion so that one end of the grounding via hole is connected to the grounding pattern of the uppermost substrate and the other end of the grounding via hole is connected to the grounding pattern of the feeding substrate portion. Gain omnidirectional antenna
The method of claim 7,
Wherein at least one of the conductive radiation patterns is different in size from at least one of the remaining conductive radiation patterns,
The method according to claim 7 or 8,
And at least one connection via hole formed through at least one of the plurality of substrates to electrically connect the two radiation patterns of the conductive radiation patterns. The method of claim 9,
Wherein the number of via holes formed in at least one substrate among the plurality of substrates is different from the number of via holes formed in at least one substrate among the remaining substrates,
The method of claim 6,
Characterized in that the conductive radiation pattern is circular and the parasitic pattern is ring-

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