KR101608003B1 - Inbuilding omni antenna and arrangement structure of the same - Google Patents

Abstract

The present invention relates to an omni-antenna for in-building, capable of improving economic feasibility by solving a limitation of a shaded area and maximizing the coverage of a single antenna module. The omni-antenna includes: a housing; a main frame placed from the center of the housing in a vertical direction; a longitudinal waveguide part placed to be orthogonal to the main frame and emitting radio waves directly downwardly; a pole part horizontally extended from the main frame; and a transverse waveguide part placed to be orthogonal to the pole part and transversely emitting radio waves. Therefore, a shaded area in a directly downward direction is removed and a radiation property of radio waves is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an omnidirectional antenna,

The present invention relates to an antenna, and more particularly, to an in-building omni antenna and an omnidirectional antenna arrangement in which the shade area is eliminated and the coverage of a single antenna module is maximized, thereby improving the economical efficiency.

An antenna can be seen as a sort of wire installed in the air to efficiently radiate radio waves into space to achieve the purpose of communication in wireless communication or to induce electromotive force efficiently by radio waves.

2. Description of the Related Art Generally, a portable terminal used in a wireless communication system varies in service area according to a user's location movement, and various wireless communication relay antennas are installed in each service area.

As such an antenna for wireless communication relay, an omni antenna which can be mounted on a ceiling for wireless communication service is used in a shaded area such as inside of a building where radio waves are difficult to pass through.

In order to provide service to portable terminals located in the shaded area inside the building, communication service providers are trying to increase the satisfaction of users' service quality by distributing the repeaters. In the case of the omnidirectional antenna, it is possible to smoothly transmit and receive radio waves in each shade area inside the building.

1 is a view showing a conventional ceiling mount type omnidirectional antenna.

A radome (10) that performs a function of a housing and improves radiation efficiency of a radio wave, a space (20) formed inside the radome (10) and accommodated inside the radome (10) A reflection plate 30 for reflecting light, and a connector 40 for supplying a signal to the substrate.

In recent years, a substrate-type RF signal emitting means, which can be manufactured relatively inexpensively and can minimize the space requirement, is used.

Fig. 2 is a graph showing the radiation characteristics of radio waves by the conventional omnidirectional antenna.

As shown in FIG. 2 (a), a pattern appears in all directions of 360 degrees according to the omnidirectional characteristic of the pattern in the horizontal direction. In the case of the vertical pattern shown in FIG. 2 (b) It is common to have an upward pattern having a butterfly shape due to the influence.

Considering that the omnidirectional antenna is attached to the ceiling in consideration of spatial usability, it can be predicted that shading may occur in the space directly under the omnidirectional antenna. In fact, when communication is performed indoors, the gain value is low at the portion directly under the omnidirectional antenna, resulting in a shaded area.

In addition, although the omnidirectional antenna is manufactured using the substrate in the conventional case, the efficiency of the production process and the cost advantage in the facility are obtained. However, the actual coverage in the horizontal direction is only 20 to 30 meters, Since the plurality of antennas must be arranged so that their respective coverage areas overlap each other for smooth operation, the object of economical efficiency is not achieved.

To solve this problem, it is possible to consider using a high gain patch antenna or a conventional Yagi antenna. However, a high gain patch antenna is expensive and a Yagi antenna has a problem in terms of equipment and space It also has a problem of aesthetics.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an omnidirectional antenna structure and an omnidirectional antenna structure for a building, which can solve the problem of generation of a shadow area of a conventional omni- .

An omnidirectional antenna disposed on a wall surface or a ceiling, comprising: a housing; a main frame disposed in the longitudinal direction at the center of the housing; a vertical axis waveguide disposed perpendicularly to the main frame and radiating radio waves in a downward direction; There is provided an omnidirectional antenna for an in-building including a pole portion extending in the horizontal direction in the frame and a transverse wave element arranged orthogonally to the pole portion and radiating radio waves in the lateral direction. Therefore, the shadow area in the downward direction is eliminated and the radiation characteristic of the radio wave is improved.

It is preferable that the main frame and the pawl portion are made of a hollow tube.

The main frame may be integrally formed with a wall portion or a connector portion connected to the ceiling. Therefore, it is structurally robust and simple.

It is preferable that the pawl portions have a plurality of the pawl portions and are arranged at equal intervals in the circumferential direction with respect to the main frame for the radio wave radiation characteristic.

And a fixing unit which surrounds the main frame and fixes the pawl part and reflects the radio wave of the transverse wave part in the radial direction. Therefore, the propagation efficiency is improved.

The housing may include a main housing disposed to surround the pole portion and the transverse wave portion, and a protruding housing protruding downward from the center of the main housing and disposed to surround the main frame and the vertical axis waveguide.

On the other hand, the present invention is an embodiment of the omnidirectional antenna arrangement structure including the omnidirectional antenna for in-building, wherein the pawl portions are arranged at regular intervals with respect to the main frame, and each omni- The imaginary line being perpendicular to the imaginary line extending from the pole portion of the adjacent omnidirectional antenna. Therefore, the cost of the equipment is reduced, and the maximum coverage can be ensured with the minimum antenna installation.

Further, the present invention is another embodiment of the omnidirectional antenna arrangement structure including the omnidirectional antenna for in-building, wherein the pole portions are arranged at regular intervals with respect to the main frame, and each of the omni antennas has a virtual The omnidirectional antenna structure is arranged such that the line is directed between the pole portion and the pole portion of the adjacent omnidirectional antenna. Therefore, the purpose of efficiency and economical efficiency is achieved by having a certain uniform gain value for a predetermined space.

According to the in-building omnidirectional antenna of the present invention, since the efficiency of radio wave radiation is improved, it is possible to solve the shaded area in the downward direction, thereby improving the satisfaction of users using the terminal.

Further, since the propagation characteristics are superior to those of the omnidirectional antenna including the propagation element made of the conventional substrate, the coverage of a single omnidirectional antenna can be further widened. This has a slight increase in the manufacturing unit cost compared with the conventional one, but the number of facilities is remarkably reduced from the viewpoint of coverage in terms of area, thereby providing an effect of remarkably reducing cost due to the facility.

1 is a side sectional view showing a conventional ceiling mount type omnidirectional antenna.
2 is a graph showing radiation characteristics of radio waves by the omnidirectional antenna of Fig.
3 is a side cross-sectional view of an omnidirectional antenna for in-building of the present invention.
4 is a view schematically showing a radiation pattern of a radio wave by an omnidirectional antenna for in-building of the present invention.
5 is a top cross-sectional view of an omni-antenna for an in-building according to a further concept of the present invention.
6 is a view for explaining a preferred embodiment of the omnidirectional antenna arrangement of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

3 is a side sectional view for explaining an omnidirectional antenna for an in-building according to the concept of the present invention.

The present invention basically provides an omnidirectional antenna that can be coupled to a ceiling or a wall as a structure, and includes a Yagi antenna to provide a directional omnidirectional antenna.

The conventional omnidirectional antenna in the horizontal direction has a manufacturing advantage, but has a problem that the covered area is small and a shadow area in a downward direction is generated. In order to solve the problem, the present invention proposes a configuration that combines the advantages of the conventional Yagi antenna with the conventional omnidirectional antenna and efficiently secures a coverage range of the radio wave to the space.

The omnidirectional antenna for in-building provided in the present invention is not limited to the inner space of the divided building but may be an antenna capable of transmitting and receiving various types of information in cooperation with antennas having a wide coverage in a normal manner Should be understood to include concepts.

The YAG antenna may be a combination of a transverse component and a longitudinal component, as shown in the figure, wherein the longitudinal axis waveguide 221, which is a longitudinal component, is formed so as to eliminate the shaded area of the omni antenna 100 Function.

In the embodiments of the present invention, the form to be attached to the ceiling portion is basically described, but the state of the present invention also includes a state of being arranged on a wall surface or an edge portion of a wall or a floor surface in some cases. The orientation of the embodiments to be described later may be flexibly applied according to the orientation of the region to be disposed.

The housing having the overall appearance serves to receive and protect the antenna, the waveguide, and the power supply part such as the power feeder. In the present invention, since the antenna structure is composed of longitudinal and transverse components, And a protruding housing 120 protruding downward from a central side of the main housing 110. The protruding housing 120 protrudes downward from the center of the main housing 110. [

The protruding housing 120 preferably has a cross sectional area on the flat surface of the main housing 110 smaller than a cross sectional area of the main housing 110.

Although the main housing 110 and the protruding housing 120 may be integrally formed, the protruding housing 120 may be formed in the main housing 110 (see FIG. 1) in consideration of the maintenance of longitudinal components including the longitudinal axis waveguide 221 As shown in Fig.

A flat plate-shaped reflector 300 may be disposed so as to cover the upper side of the main housing 110. The reflector 300 may be formed in such a manner that the propagation by the wave guide parts is unnecessarily radiated upward, The efficiency can be increased. For this, the reflection unit 300 may be made of a material having a good reflection efficiency of the radio wave or may be applied to the bottom surface of the reflection unit 300.

The connector unit 400 extends upward through the reflection unit 300 and the connector unit 400 may be connected to a predetermined conductor so as to transmit and receive signals to / from the outside. It is preferable that at least a part of the connector part 400 is formed in the shape of a hollow tube and that the connector part 400 is connected to the main frame 210 downwardly have.

The main frame 210 constitutes a longitudinal component as an antenna and may be coupled with a longitudinal axis waveguide 221 protruding in the outer circumferential direction.

At this time, the direction in which the main frame 210 is oriented refers to the direction in which the radio waves are directed.

Although only the case where the longitudinal axis waveguide 221 is coupled to the distal end of the main frame 210 is shown in the drawing, the shape and arrangement of the longitudinal axis waveguide 221 may be selectively made. However, as described above, the vertical axis waveguide 221 and the main frame 210 are required to have a function of eliminating the shaded area in the downward direction of the omnidirectional antenna 100, ≪ / RTI >

The main frame 210 may have a structure in which the main frame 210 is mutually connected as a separate tubular member from the connector unit 400, but may be integrally formed.

In the description of the present invention, a feeder line extending from the connector portion 400 to the inside of the main frame 210 and the pawl portion 220 may be disposed, and the arrangement of the projector and the reflector may be considered, It will be possible.

On the other hand, one or more claw portions 220 may be disposed in the lateral direction orthogonal to the main frame 210. Since the pole portion 220 is directed in the horizontal direction, the pole portion 220 functions to secure a wide coverage on a plane.

A plurality of transverse waveguides 211 may be coupled to the pole part 220 in a direction orthogonal to the transverse waveguide 220. The transverse waveguide 211 radiates radio waves with predetermined directivity in the transverse direction.

Compared with the case where a patch antenna element of the conventional substrate type is applied, the horizontal wave propagation distance can be further enlarged owing to the arrangement of the transverse wave element 211, and the longitudinal coverage due to the lateral component is further widened It is important to note that this has the advantage of being able to

The omnidirectional antenna 100 of the present invention has a predetermined directivity in the lateral direction depending on the arrangement state of the claw portions 220. [ Accordingly, it is preferable that the plurality of claw portions 220 are arranged at regular intervals in the circumferential direction with respect to the main frame 210. However, when the claw portions 220 are arranged at the corners of the wall, Can also be considered.

The main housing 110 and the protruding housing 120 can be determined in terms of the length and arrangement of the main frame 210, the pawl portion 220, the lateral side wave portion 211 and the longitudinal axis wave portion 221 The main housing 110 is preferably formed in such a shape that the height decreases toward the outer circumferential direction according to the length relationship of the transverse waveguide 211 in view of spatial efficiency.

4 is a conceptual diagram showing radiation characteristics of a radio wave in the oven antenna for in-building of the present invention.

The omnidirectional antenna 100 is disposed with its omnidirectional antenna 100 oriented downward on the basis of the mounting state of the ceiling portion and the radio wave can be conceptually divided into a horizontal direction component α and a vertical direction component β have.

The horizontal direction component α represents a radio wave emitted from the transverse wave member 211 due to the directivity of the claw portion 220, and it is confirmed that the width (ℓ) is remarkably improved as compared with the conventional substrate patch method. Further, there is an advantage that the coverage of the height in the horizontal direction component? Is also increased.

The vertical component (?) Indicates the coverage of the radio wave determined by the direction of the main frame (210) and emitted from the vertical axis wave part (221), and is mainly used to solve the problem of the shadow area in the downward direction . The height d of the vertical direction component β is determined by the main frame 210 and the longitudinal axis waveguide 221 and can exhibit a gain of about 4 to 5 dBi or more in the direct downward direction.

5 is a top cross-sectional view of an omni-antenna for an in-building according to a further concept of the present invention.

The horizontal direction component of the radio wave has directivity and the directivity is determined by the directing direction of the pawl portion 220 as described above. The plurality of pawls 220 are arranged at equal intervals in the circumferential direction about the main frame 210. Therefore, when the pawls 220 are arranged to cover a predetermined space, .

In the drawing, four pawls 220 are arranged in the circumferential direction, but this arrangement is optional.

Each of the pole portions 220 includes a plurality of transverse waveguides 211. As the number of the horizontal components α is increased, the radio wave coverage close to a predetermined square wave can be formed.

The main housing 110 protects the pole portion 220 and the transverse wave portion 211, which are mainly transverse components, and functions as a radome. In the present invention, the pole portions 220 are arranged in a radial direction in the form of a branch, The main housing 110 can be formed in a corresponding radiation pattern.

Although the main housing 110 has four branches in the illustrated embodiment, the main housing 110 is optional and may be formed in a flat circular shape as the case may be.

Meanwhile, it is preferable that the radio waves radiated from each of the transverse waveguides 211 are oriented in the outer circumferential direction, and it is possible to reflect the radio waves emitted from the transverse waveguide 211 while fixing the plurality of the pawl portions 220 in the outer circumferential direction The fixing unit 310 is further disposed.

The fixing part 310 includes a main frame 210 disposed at a substantially center thereof and pawls 220 arranged around the main frame 210. The fixing part 310 includes a ring or a cylindrical As shown in FIG.

At this time, it is preferable that the height of the fixing portion 310 is set to be higher than the height of the longest longest side wave portion 211 in consideration of the reflection efficiency of the radio wave.

According to the additional concept described above, the efficiency of radio wave reception in the downward direction is mainly provided in the reflection unit 300, and the efficiency of radio wave reception in the radial direction can be provided in the fixing unit 310.

FIG. 6 is a conceptual diagram showing an embodiment in which an omnidirectional antenna arrangement structure is formed by arranging a plurality of omnidirectional antennas for building and coverage of a radio wave is formed in a predetermined space.

For example, each omnidirectional antenna 100 includes four pole portions 220, and one omnidirectional antenna 100a is disposed to determine the range of the horizontal direction component a, which is a single coverage in the horizontal direction, , The other omnidirectional antenna 100b can be appropriately arranged so that a part of the horizontal direction component [alpha] can be crossed.

In this case, in the omnidirectional antenna 100 in which four claw portions 220 are arranged at regular intervals as shown in the drawing, it is effective that the omnidirectional antenna 100b is arranged in a diagonal direction with respect to the directionality of the claw portion 220. [

The imaginary extension lines of the pawl portions 220 form an orthogonal grid pattern and the horizontal components a by the respective pawl portions 220 are aligned along the sides of the lattice pattern Lt; / RTI >

When these pole portions 220 are arranged in five in one omnidirectional antenna 100, a pentagon is formed by imaginary extension lines, and likewise, the horizontal direction components a can be formed along the sides of the pentagon will be.

As another embodiment, it may be considered that the other omnidirectional antenna 100b is arranged in the region between the horizontal direction components? On the basis of the arrangement state of one omnidirectional antenna 100a.

That is, since the gain is relatively small in the direction in which the pole part 220 and the pole part of one omnidirectional antenna 100a are oriented, any one of the pole parts 220 of the other omnidirectional antenna 100b is a single omni antenna 100a to the center of the pole portion and the pole portion.

In this case, the distance between the omnidirectional antennas 100 may be relatively small rather than the one embodiment, but the coverage may be formed to form a somewhat uniform gain without being limited by the direction.

The oven antenna for in-building according to the present invention has an advantage of improving the efficiency of radio wave radiation and thus improving the satisfaction of the use of the terminal by eliminating the shaded area in the downward direction

Further, since the propagation characteristics are superior to those of the omnidirectional antenna including the propagation element made of the conventional substrate, the coverage of a single omnidirectional antenna can be further widened. This is advantageous in that the cost due to the equipment can be remarkably reduced since the number of facilities is remarkably reduced from the viewpoint of coverage in terms of area, although there is a slight increase in the manufacturing unit cost as compared with the conventional one.

In the foregoing, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

100 ... Omni antenna 110 ... Main housing
120 ... protruding housing 210 ... main frame
211 ... transverse side wave 220 ... pawl
221 ... longitudinal axis waveguide 300 ... reflective portion
310 ... fixed portion 400 ... connector portion

Claims (8)

An omnidirectional antenna disposed on a wall or ceiling,
housing;
A main frame disposed longitudinally at the center of the housing;
A vertical axis waveguide disposed orthogonally to the main frame and radiating radio waves in a downward direction;
A pawl extending in a horizontal direction in the main frame; And
And a transverse waveguide disposed orthogonally to the pole portion and emitting radio waves in a transverse direction.
The method according to claim 1,
Wherein the main frame and the pawl portion comprise:
And a hollow tube.
3. The method of claim 2,
The main frame includes:
And is formed integrally with a wall portion or a connector portion connected to the ceiling.
The method according to claim 1,
The pawl portion
Wherein the plurality of antennas are arranged at equal intervals in the circumferential direction with respect to the main frame.
5. The method of claim 4,
Further comprising: a fixing unit for surrounding the main frame and fixing the pole part and reflecting the radio wave of the transverse wave part in a radial direction.
The method according to claim 1,
The housing includes:
And a protruding housing protruding downward from a center side of the main housing and disposed to surround the main frame and the longitudinal axis waveguide.
7. An omnidirectional antenna arrangement including a building omni antenna according to any one of claims 1 to 6,
The pawl portions are arranged at regular intervals with respect to the main frame,
Each of the omnidirectional antennas is arranged such that a virtual line extending from the pole portion is orthogonal to a virtual line extending from the pole portion of the adjacent omnidirectional antenna.
7. An omnidirectional antenna arrangement including a building omni antenna according to any one of claims 1 to 6,
Wherein the pole portions are arranged at regular intervals with respect to the main frame,
Wherein each of the omnidirectional antennas is arranged such that a virtual line extending from the pole portion is directed between the pole portion and the pole portion of the adjacent omnidirectional antenna.

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