WO2016036043A2

WO2016036043A2 - Omnidirectional antenna

Info

Publication number: WO2016036043A2
Application number: PCT/KR2015/008879
Authority: WO
Inventors: 신옐리코프유리; 김상기; 김상진
Original assignee: 주식회사 감마누
Priority date: 2014-09-05
Filing date: 2015-08-25
Publication date: 2016-03-10
Also published as: KR101548915B1; WO2016036043A3

Abstract

The present invention relates to an omnidirectional antenna characterized by comprising: a ground plate; a monocone-type vertically polarized radiation element formed on a vertical shaft of the ground plate and split into a plurality of blades; a dielectric substrate formed at a predetermined distance from the upper surface of the ground plate, the dielectric substrate having a penetration portion that penetrates the vertically polarized radiation element; and a plurality of horizontally polarized radiation elements formed on the dielectric substrate.

Description

Omni antenna

The present invention relates to an omni antenna, and more particularly, to a multi-band dual polarized omni antenna applicable to 4G LTE communication.

Repeater antennas used in wireless communication systems are classified into omnidirectional antennas and directional antennas according to the direction in which electromagnetic waves are radiated. Here, an omni antenna, which is a kind of omnidirectional antenna, is used to be attached to a ceiling or a wall to transmit and receive electromagnetic waves in a sound region where a base station signal is weak, such as inside a building.

Conventional omni antennas are capable of relaying only a single frequency band, and thus different omni antennas are used for individual frequency bands. Accordingly, in the case of the omni antenna that is in charge of the low frequency band, there is a problem that the size of the antenna is increased to increase the length of the antenna and the manufacturing cost is increased accordingly, and from the standpoint of the installer, the omni antenna must be installed for each frequency band. There was a problem in the installation space and installation cost increases.

On the other hand, in recent years, the use of multiple frequency bands has become common, and as the development of wireless communication technology, 4G Long Term Evolution (LTE), the fourth generation mobile communication used in Korea, adopts a MIMO (Multi Input Multi Output) system. In addition, omni antennas are in charge of both the low frequency band and the high frequency band and are required to be downsized.

Accordingly, an object of the present invention is to provide a miniaturized omni antenna that covers both the low frequency band and the high frequency band.

On the other hand, the technical problem to be achieved by the present invention is not limited to the above-described technical problem, various technical problems can be derived within the scope apparent to those skilled in the art from the following description.

Omni antenna according to an embodiment of the present invention is formed on the ground plate, the vertical axis of the ground plate, a vertically polarized radiating element of the monocon type divided into a plurality of blades, spaced apart from the upper surface of the ground plate by a predetermined interval And a dielectric substrate having a penetrating portion through which the vertically polarized radiating element passes, and a plurality of horizontally polarized radiating elements formed on the dielectric substrate.

The plurality of horizontally polarized radiating elements may include a loop-type first horizontally polarized radiating element that is formed spaced apart from the penetrating portion by a predetermined interval and a loop type that is formed spaced apart from the first horizontal polarized radiating element by a predetermined interval. And a second horizontally polarized radiating element.

In addition, the loop type first and second horizontally polarized radiating elements may be divided into a plurality of sectors.

In addition, the first horizontal polarization radiating element may transmit and receive a high frequency band, and the second horizontal polarization radiating element may transmit and receive a low frequency band.

In addition, the vertically polarized radiating element may be composed of four blades at a predetermined angle.

The apparatus may further include a first feed part connected to the vertical polarization radiating element, a 2-1 feed part connected to the first horizontal polarization radiating element, and a second-2 feed part connected to the second horizontal polarization radiating element. The second feeder may further include a.

The second-2 feed part may be a common mode choke coil which is formed perpendicular to a space in which the ground plate and the dielectric substrate are spaced apart from each other.

The 2-1 feed unit and the 2-2 feed unit may be connected through a duplexer, and the duplexer may be formed on one surface of the ground plate.

In addition, the omni antenna may further include a radome inserted therein.

According to the present invention, the omni antenna size can be miniaturized by forming the first horizontal polarized wave radiating element for the high frequency band and the second horizontal polarized wave radiating element for the low frequency band on one dielectric substrate.

In addition, since it can cover both the low frequency band and high frequency band, it is possible to provide an omni antenna suitable for 4G LTE communication network.

In addition, since the radiation pattern of the antenna has a non-directional characteristic, it is possible to efficiently cover a large space regardless of the direction.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the scope apparent to those skilled in the art from the following description.

1 is a view showing a vertically polarized radiating element and a ground plate according to an embodiment of the present invention.

2 is a diagram illustrating a horizontally polarized radiating element and a dielectric substrate according to an exemplary embodiment.

3 is a view showing a feeder of the horizontally polarized radiating element according to an embodiment of the present invention.

4 is a view showing a bottom surface of the ground plate according to an embodiment of the present invention.

5 is a view showing the overall appearance of the omni antenna according to an embodiment of the present invention.

Meanwhile, reference numerals used in the drawings are as follows.

10: vertically polarized radiating element

11: first feeder

20: ground plate

30: horizontally polarized radiation element

31: first horizontally polarized radiating element 32: second horizontally polarized radiating element

33: second feeder

34: 2-1 feed part

35: 2-2 feed part

35-1: 2-2-1 Power Feeder 35-2: 2-2-2 Power Feeder

35-3: 2-2-3 power supply part 35-4: 2-2-4 power supply part

36: duplexer

37-1: First Power Divider 37-2: Second Power Divider 37-3: Third Power Divider

40: dielectric substrate

41: through part

50: Radom

100: omni antenna

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments to be described are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and thus, the present invention is not limited thereto, and it is determined that detailed descriptions of related well-known configurations or functions may obscure the gist of the present invention. In this case, detailed description thereof will be omitted.

In addition, the matters represented in the accompanying drawings may be different from the form actually embodied in the schematic drawings in order to easily explain the embodiments of the present invention. In addition, in addition to the reference numerals to the components of the drawings, the same configuration It is to be noted that the elements are designated by the same reference numerals as much as possible even if they are shown in different drawings.

In addition, the expression "comprising" certain elements is merely an expression of an 'open', and simply refers to the existence of the elements, and should not be understood as excluding additional elements.

1 is a view showing a vertical polarization radiating element 10 and a ground plate 20 according to an embodiment of the present invention.

The vertically polarized radiating element 10 is formed on the vertical axis of the ground plate 20. Here, the vertically polarized radiating element 10 may be a wideband element that covers a wide frequency band of 698Mhz to 2700Mhz, and specifically, may be a monocon type radiating element. Meanwhile, referring to FIG. 1, it can be seen that the vertically polarized radiating element 10 of the monocon type is divided into a plurality of blades. For example, the vertically polarized radiating element 10 may be divided into four blades having a predetermined angle, and in FIG. 1, the blades are arranged in a square shape having a 90 ° angle with each other. Thus, the distance between neighboring blades is the same and the distance between a pair of opposing blades is equal to the distance between another pair of opposing blades. In addition, the imaginary line across the pair of opposing blades is orthogonal to the imaginary line across the other pair of opposing blades. In this case, although the blade is divided into four, by receiving a common feed signal from the first feed section 11, both the blades facing each other and the vertical polarization emitted by neighboring blades are in phase, and the whole Vertical polarization is nondirectional. In addition, even if there are not four blades, by arranging a plurality of blades properly, the entire vertical polarization can be configured to have a non-directional characteristic, even four blades are not arranged in a square shape, but arranged in a variety of shapes, Of course, you can have a specificity of directivity

On the other hand, the aforementioned first feed section 11 provides a feed signal to the vertically polarized radiating element 10 divided into a plurality of blades, it is possible to use a variety of feed means such as coaxial cable. In addition, the ground plate 20 may use a reflecting plate, and may be implemented in various forms according to the shape of the omni antenna 100, such as a square or circular flat form, and is not limited to the circular form as shown in FIG.

2 is a diagram illustrating a horizontally polarized radiating element 30 and a dielectric substrate 40 according to an embodiment of the present invention.

The dielectric substrate 40 may be embodied in the same square or circular plane form as the ground plate 20, and may be implemented in various forms in consideration of the shape of the omni antenna as a whole. In addition, a through portion 41 through which the vertically polarized radiating element 10 penetrates is formed in the dielectric substrate 40, and a plurality of through portions 41 are formed according to the number of blades forming the vertically polarized radiating element 10. Can be formed.

On the other hand, the horizontally polarized radiating element 30 may be formed in a variety of shapes on the dielectric substrate, referring to Figure 2 it can be seen that formed in a loop type.

In this case, the horizontally polarized radiating element 30 is a loop-type first horizontal polarized radiating element 31 that transmits and receives a high frequency band of 1700 MHz to 2700 MHz and a second horizontal polarized radiation of a loop type that transmits and receives a low frequency band of 698 MHz to 960 MHz. Element 32 may be configured.

The first horizontal polarization radiating element 31 may be formed to be spaced apart from the through part 31 formed in the dielectric substrate 40 by a predetermined interval. Specifically, referring to FIG. 2, it can be seen that the first horizontally polarized radiating element 31 is formed to surround the through part 31 through which four blades pass.

In addition, the second horizontally polarized radiating element 32 is formed to be spaced apart from the outside where the first horizontally polarized radiating element 31 is formed. Specifically, referring to FIG. 2, the second horizontally polarized radiating element 32 is formed to surround the first horizontally polarized radiating element 31 by being spaced apart by a predetermined interval to the outside where the first horizontally polarized radiating element 31 is formed. You can see that. This is because the second horizontally polarized radiating element 32 transmits and receives a low frequency band and thus has a length longer than that of the first horizontal polarized radiating element 31 that transmits and receives a high frequency band. As described above, since the first horizontal polarized wave radiating element 31 and the second horizontal polarized wave radiating element 32 are simultaneously formed on one dielectric substrate 40, the size of the entire omni antenna 100 can be reduced.

In addition, the loop type horizontally polarized radiating element 30 may be divided into a plurality of sectors. In detail, both the first horizontal polarized wave radiating element 31 that transmits and receives a high frequency band and the second horizontal polarized wave radiating element 32 that transmits and receives a low frequency band may be divided into a plurality of sectors. In this case, a plurality of sectors in which the first horizontal polarization radiating element 31 is divided and a plurality of sectors in which the second horizontal polarization radiating element 32 is divided are mutually adjacent to each other. Can be connected. In addition, the number of divided sectors can be appropriately changed as necessary.

On the other hand, the horizontally polarized radiating element 30 is a 2-1 power supply unit for providing a feed signal to the first horizontal polarized radiating element 31 and the second to provide a feed signal to the second horizontal polarized radiating element 32. By receiving the feed signal by the second feeder 33 including the two feeders, the entire horizontal polarization may have a non-directional characteristic, which will be described in detail with reference to FIG. 3.

3 is a view showing a power supply unit of the horizontally polarized radiating element 30 according to an embodiment of the present invention.

Referring to FIG. 3, the first horizontally polarized radiating element 31 is supplied with a feed signal through a balanced line connected to the second-first feeding unit 34 and the second horizontally polarized radiating element 32. ) Can be seen that the feed signal is provided from each balanced line connected to the four second-2 feed units 35 formed at 90 ° to each other. In detail, the first horizontal polarized wave radiating element 31 and the second horizontal polarized wave radiating element 32 are balanced lines connected to the second-first feed part 34 and the four second-second feed parts 35, respectively. (Balanced Line) can be divided into four compartments, each of the divided compartments facing each other is provided with a feed signal having a phase difference of 180 °, the entire horizontal polarization has a non-directional characteristic. Hereinafter, the power supply unit of the horizontally polarized radiating element 30 will be described in more detail with reference to FIG. 4.

Referring to FIG. 4, it can be seen that the 2-1 feed unit 34 and the 4-2-2 feed units 35 are connected through a duplexer 36 formed on the bottom surface of the ground plate 20. Specifically, the second feeder 33 is connected to the input terminal of the duplexer 36, the 2-1 feeder 34 is connected to the duplexer 36 as one output terminal, four second-class 2-2 The whole 35 is tied together by a plurality of power dividers and connected to another output of the duplexer 36. For example, the 2-2 power feeding portion 35 in the 12 o'clock position is referred to as the 2-2-1 power feeding portion 35-1, and the 2-2-2 and the 2-2- clockwise, respectively. If it is 3, 2-2-4 power feeding part 35-2, 35-3, 35-4, the 2-2-1 power feeding part 35-1 and the 2-2-4 power feeding part 35 -4) is grouped together by the first power divider 37-1, and likewise, the second-2-2 feeder 35-2 and the second-2-3 feeder 35-3 are also second-owned. Tied together by a power divider 37-2. Finally, the first power divider and the second power divider are bundled together by the third power divider 37-3 and connected to the output terminal of the duplexer 36. Here, each of the second-2 feeders 35, which are bundled together by the power divider, may be bundled in a different combination from that of FIG. 4 according to the arrangement of the duplexer 36. Meanwhile, the duplexer 36 may be formed not only on the bottom surface of the ground plate 20 but also on the top surface as shown in FIG. 4. That is, it may be formed on any one surface of the ground plate 20.

Meanwhile, FIG. 4 illustrates that the first horizontal polarized wave radiating element 31 receives a feed signal through a balanced line connected to the 2-1 power feeding part 34, but the second horizontal polarized wave radiating element 31 is shown. Like the element 32, the power supply signal may be provided through four power supply units. In addition, both the 2-1 power supply unit 34 and the 2-2 power supply unit 35 may be composed of various numbers of power supply units as necessary, as well as a coaxial cable or a common mode choke coil for power supply (Common It can be configured using various methods such as Mode Choking Coil).

5 is a view showing the overall appearance of the omni antenna 100 according to an embodiment of the present invention.

The vertically polarized radiating element 10 formed on the vertical axis of the ground plate 20 penetrates the through part 41 formed in the dielectric substrate 40 and finally forms the omni antenna 100. In addition, the second-second feed part 35 may be formed vertically in the form of a common mode choke coil in a space where the ground plate 20 and the dielectric substrate 40 are separated from each other, and support the dielectric substrate 40. A plurality of support pillars may be included. On the other hand, with respect to the power supply is connected to the input terminal of the first feeder 11 and the duplexer 36 for providing a feed signal to the vertically polarized radiating device 10, the second feeder for providing a feed signal to the horizontally polarized radiating device 30 Only the two feeders 33 are exposed to the outside.

In addition, the omni antenna 100 may further include a radome 50 is inserted therein. In this case, the radome 50 may have a shape in which the center portion protrudes in order to prevent the vertically polarized radiating element 10 penetrating the dielectric substrate 40 from being exposed to the outside of the omni antenna 100. Of course, it can be implemented in a variety of shapes. In addition, the diameter of the radome 50 includes both the ground plate 20 and the dielectric substrate 40 and the diameter of the ground plate 20 and the dielectric substrate 40 to minimize the size of the omni antenna 100. It is desirable to form as close as possible.

The omni antenna 100 according to an embodiment of the present invention includes a vertical polarization radiating element 10 that covers a wide frequency band from a low frequency band to a high frequency band, a first horizontal polarization radiating element 31 that serves a high frequency band, and a low frequency. Since all of the second horizontally polarized radiating elements 32 in charge of the band are included, a 4G Long Term Evolution (LTE) communication network requiring a MIMO (Multi Input Multi Output) system may be satisfied. In addition, since the first horizontal polarization radiating element 31 and the second horizontal polarization radiating element 32 are formed on one dielectric substrate 40, the size of the omni antenna 100 can be reduced. In addition, since the polarization of the antenna has a non-directional characteristic, it is possible to efficiently cover a large space regardless of the direction.

Embodiments of the invention described above are disclosed for purposes of illustration, and the invention is not limited thereto. In addition, one of ordinary skill in the art of the present invention will be able to add various modifications and changes within the spirit and scope of the present invention, these modifications and changes will be considered to be within the scope of the present invention.

Claims

Ground plate;

A vertically polarized radiating element of a monocon type formed on a vertical axis of the ground plate and divided into a plurality of blades;

A dielectric substrate spaced apart from the upper surface of the ground plate by a predetermined interval and having a through portion through which the vertically polarized radiating element penetrates; And

A plurality of horizontally polarized radiating elements formed on the dielectric substrate;

Omni antenna including
The method of claim 1,

The plurality of horizontal polarization radiating elements,

A first horizontally polarized radiation element of a loop type spaced apart from the through portion by a predetermined distance; And

A second horizontally polarized radiating element of a loop type formed spaced apart from the first horizontally polarized radiating element by a predetermined interval;

Omni antenna, characterized in that it comprises a
The method of claim 2,

The loop type first and second horizontally polarized radiating elements,

Omni antenna, characterized in that divided into a plurality of sectors
The method of claim 2,

The first horizontal polarization radiating element transmits and receives a high frequency band,

The omni antenna, characterized in that the second horizontal polarization radiating element transmits and receives a low frequency band
The method of claim 1,

The vertically polarized radiation device,

Omni antenna, characterized in that consisting of four blades at a predetermined angle
The method of claim 2,

A first feeding part connected to the vertically polarized radiating element; And

A second feeder including a 2-1 feeder connected to the first horizontally polarized radiation device and a 2-2 feeder connected to the second horizontally polarized radiation device;

Omni antenna further comprises a
The method of claim 6,

The second-2 feed section,

An omni antenna, characterized in that the common mode choke coil is formed perpendicular to the space spaced apart from the ground plate and the dielectric substrate
The method of claim 6,

The 2-1 feed unit and the 2-2 feed unit,

Connected through a duplexer,

The duplexer,

Omni antenna, characterized in that formed on one surface of the ground plate
The method according to any one of claims 1 to 8,

A radome into which the omni antenna is inserted;

Omni antenna, characterized in that it further comprises