KR100705438B1 - Antenna - Google Patents

Abstract

The present invention relates to an antenna that can improve the call quality by attenuating the reflected wave received by the antenna by improving the configuration of the reflector of the antenna, the cover, which is provided inside the cover, the copier for transmitting and receiving radio waves by feeding a signal in the service area It is provided in the front of the copying machine to guide the radio waves, provided in the rear of the copying machine is a reflector for reflecting the radio wave, is mounted along the longitudinal direction of the cover and includes an auxiliary reflector for reflecting the radio wave separately from the reflector.

Antenna, Yagi Antenna, Reflector, Film

Description

ANTENNA {ANTENNA}

1 is an exploded perspective view showing the configuration of an antenna according to a first embodiment of the present invention.

2 is a coupling diagram showing the configuration of an antenna according to a first embodiment of the present invention.

3 is a plan view illustrating a coupling relationship between a cover and an auxiliary reflector according to the first exemplary embodiment of the present invention.

4 is a plan view illustrating another coupling relationship between the cover and the auxiliary reflector according to the first exemplary embodiment of the present invention.

5 is a coupling diagram showing the configuration of an antenna according to a second embodiment of the present invention.

6 is a plan view illustrating a coupling relationship between a cover and an auxiliary reflector according to a second exemplary embodiment of the present invention.

7 is a plan view illustrating another coupling relationship between a cover and an auxiliary reflector according to the second exemplary embodiment of the present invention.

8 is a coupling diagram showing the configuration of an antenna according to a third embodiment of the present invention.

9 is a plan view illustrating a coupling relationship between a cover and an auxiliary reflector according to a third exemplary embodiment of the present invention.

10 is a plan view illustrating another coupling relationship between a cover and an auxiliary reflector according to a third exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100; Antenna 110; cover

120; Copier 130; Waver

140; Reflectors 150, 200, 210; Secondary reflector

The present invention relates to an antenna, and more particularly, to an antenna that improves a wireless environment by reducing the influence of reflected waves received by an antenna.

In general, when a certain distance is dropped in a wireless communication environment, unlike a theoretical transmission distance, connection and data exchange are not properly performed. For this reason, the antenna can be used to extend the transmission distance and bandwidth of the wireless data, so that wireless communication can be performed even at a greater distance. Antennas can be classified into directional antennas and omnidirectional antennas.

As described above, the antenna is an apparatus for effectively transmitting and receiving radio waves, and more precisely, an antenna is an apparatus for effectively converting vibration of high frequency current into radio waves.

Antennas vary in shape from short conductors that connect to wireless microphones to large parabolic antennas for satellite communications.

However, there is a limit to the diversity in designing and optimizing a base station (Cell, cell) with an existing antenna type to be suitable for various wireless environments.

In addition, when developing various antennas for each wireless environment, it causes considerable time and cost, and even if the development is completed and used, there is a limit in producing and selling continuously because the quantity is not used.

Among these antennas, yagi antennas are used to transmit and receive radio waves with a high gain in a specific direction in a communication system.

The Yagi antenna uses a principle that radio waves are induced to reflectors or directors, which are adjacent elements, due to a magnetic field generated by a radiator supplied with a radio signal.

The reflector or waveguide used in the Yagi antenna is called a Parasitic Element, and the waveguide is actually shorter than λ / 2 and installed in front of λ / 4 relative to the copier, and the reflector is slightly longer than λ / 2. Install the copier behind λ / 4.

Is the wavelength of the frequency to be used.

In the Yagi antenna, the waveguide and the reflector have a capacitive reactance and an inductive reactance, respectively, and the radio waves are radiated from the copier to the waveguide and reflected by the reflector on the opposite side, thereby enabling efficient radiation in a desired direction.

Yagi antennas are widely used for transmitting / receiving microwaves and receiving television broadcasts, and their gains vary depending on the length, thickness, spacing, and number of elements.

However, conventional Yagi antennas have generally been used with an increased number of waveguides to improve beam width, gain, and front to back ratio (FTBR).

When the above method is used, the conventional method greatly increases the size of the antenna, and there is a problem in that the characteristic improvement effect is slightly decreased at a certain number of waveguides.

An object of the present invention is to improve the configuration of the reflector of the antenna to attenuate the reflected wave received by the antenna to provide an antenna that can improve the call quality.

In order to achieve the above object, the present invention is provided on the inside of the cover, the cover, the copier is provided in the front of the copier, the copier is provided in the front of the copier to transmit and receive the signal in the service area is supplied to the rear of the copier And a reflector for reflecting the radio waves, mounted along the longitudinal direction of the cover, and including an auxiliary reflector for reflecting radio waves separately from the reflector.

The auxiliary reflecting part may have an outer side corresponding to the inner shape of the cover and may be formed in a hollow shape and inserted into the inner side of the cover, and may have a cylindrical shape in which both ends in the longitudinal direction thereof are opened. In this case, the inner side of the cover and the outer side of the auxiliary reflector may be in surface contact.

The auxiliary reflecting part may have an inner side corresponding to the outer shape of the cover and may be formed in a hollow shape to be inserted into the outer side of the cover, and may have a cylindrical shape in which both ends in the longitudinal direction are opened. In this case, the outer side of the cover and the inner side of the auxiliary reflecting portion may be in surface contact.

The auxiliary reflector is formed of a film-shaped first reflective film, and the first reflective film is coupled to the outside or the inside of the cover to cover the outside or the inside of the cover.

The auxiliary reflector is formed of a second reflective film in which the reflective material is applied to the cover in a paste state, and the second reflective film is coupled to the outer or inner side of the cover to cover the outer or inner side of the cover.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 and 2 are an exploded perspective view and a combination view showing the configuration of an antenna according to a first embodiment of the present invention.

Referring to the above drawings, the antenna 100 according to the embodiment of the present invention is provided in front of the cover 110, the copier 120 for transmitting and receiving radio waves, the copier 120 to guide the waveguide 130 And a reflector 140, an auxiliary reflector 150, and a base 160 provided at the rear of the copier 120 to reflect radio waves.

Copier 120 constituting the antenna of the present invention may be configured as a planar copier using a microstrip substrate, so that a feeder transmission line including a dipole and a power distribution circuit and matching circuit for transmitting and receiving radio waves is printed on the substrate. Can be formed.

Copier 120 is provided inside the cover 110, the signal in the service area is fed to transmit and receive radio waves.

The waveguide 130 is provided at the front of the copier 120 to induce radio waves, and is provided at the rear of the copier 120 to reflect the radio waves.

Base 160 is coupled to the cover 110 and is formed to support the mounting state of the antenna component is fixed to the wall or bottom surface of the structure. The base 160 includes a support member 162 forming an inner space so that one side of the cover 110 is inserted and a bottom member 164 extending to the bottom of the support member 162. The bottom member 164 of the base 160 may form a bottom surface of a planar structure in consideration of coupling with the structure, and at least one hole 166 may be formed in the bottom surface.

As shown in FIG. 1, the auxiliary reflector 150 is mounted separately from the reflector 140 inside the cover 110 of the antenna 100.

The cover 110 functions to protect the antenna elements (copier, waveguide, reflector) described above to the external environment.

As described above, since the first embodiment of the present invention relates to the coupling of the cover 110 of the antenna 100 and the auxiliary reflector 150 mounted on the inner surface thereof, the internal components of the antenna 100 are described in detail. Description is omitted.

Therefore, the internal configuration of the antenna 100 according to the embodiment of the present invention can be applied to various components of the scheme. In addition, the antenna 100 according to the embodiment of the present invention may be used in the structure of a conventional Yagi antenna.

Referring to FIG. 1, the cover 110 may be formed in a shape in which both longitudinal side surfaces thereof are opened, and the cover 112 may be coupled to an upper side of the cover 110 in the longitudinal direction.

The cover 110 may be made of fiber glass (infrared glass), high strength ABS plastic (UV Stabilized High Impact ABS Plastic), or a material equivalent to or higher than that described above.

Cover 110 is preferably a shape for protecting the elements constituting the antenna 100 from the external environment. For example, the cover 110 may be formed in a rectangular cross-sectional shape in the longitudinal direction, it may be formed in an elliptical shape.

The auxiliary reflector 150 is mounted along the longitudinal direction of the cover 110 and functions to reflect radio waves separately from the reflector 140 provided inside the cover 110.

As for the material of the auxiliary reflecting part 150, it is preferable to use a material equal to or greater than that of the aluminum angle KSD 6759, the aluminum plate or the aluminum extruded steel KSD 6701, or the above materials.

As described above, the auxiliary reflector 150 according to the exemplary embodiment of the present invention is separate from the cover 110 separately from the configuration of the reflector 140 mounted inside the antenna 100 to improve the beam pattern of the antenna 100. It can be configured on the side or the inner side, it is possible to improve the side lobe (Side lobe) and the back lobe (Back lobe) of the antenna 100, and the beam becomes sharper to improve the performance of the link antenna.

There is a lot of wireless environment in the state of good call quality and wireless environment in the state of poor quality. In particular, in the urban area, each base station and a repeater are close to each other, resulting in a signal mixing section. Therefore, the antennas of the base station and the repeater are mostly located on the roof of the building and are directed under the building in order to properly serve the target service radius. However, in the city center, buildings of various heights exist within a service radius, and reflected waves and diffraction waves inevitably occur due to the buildings.

As a result, a pseudo noise pollution zone exists in the ground part of the urban area due to signals generated from adjacent base stations and repeaters and reflected and diffracted waves generated by buildings having various heights. In the case where the underground / ground in-building is serviced with existing Yagi antenna in the area where the call quality is poor, the call quality of underground / ground in-building should be good due to the characteristics of the Yagi antenna that uses an external signal as the input source. I can't.

For this reason, the first embodiment of the present invention is to improve the construction of the Yagi antenna to improve the underground / ground inbuilding call quality.

3 is a plan view illustrating a coupling relationship between a cover and an auxiliary reflector according to a first embodiment of the present invention, and FIG. 4 is a plan view illustrating another coupling relationship between the cover and an auxiliary reflector according to a first embodiment of the present invention. .

3 and 4, the auxiliary reflector 150 is coupled to the outer surface or the inner surface of the cover 110 in the first embodiment of the present invention.

Referring to FIG. 3, the auxiliary reflector 150 has an outer side corresponding to the inner shape of the cover 110 and is formed in a hollow shape and inserted into the cover 110, and has a cylindrical opening (reflector) Tubular) shape.

The inner side of the cover 110 and the outer side of the auxiliary reflector 150 are in surface contact. When the inner surface of the cover 110 and the outer side of the sub-reflective part 150 are in contact with each other, the inner side and the sub-reflective side of the cover 110 can be more firmly maintained. A bonding material (bond, adhesive) may be adhered to each other between the outer surfaces of the part 150. In addition, the outer surface of the auxiliary reflector 150 may be screwed in contact with the inner surface of the cover 110.

Referring to FIG. 4, the auxiliary reflecting unit 150 has an inner side corresponding to the outer shape of the cover 110 and is formed in a hollow shape and inserted into the outside of the cover 110, and has a cylindrical opening (both reflecting plates) at both ends in the longitudinal direction. Tubular) shape.

The outer side of the cover 110 and the inner side of the auxiliary reflecting part 150 is in surface contact, and as described above, the bonding material is bonded or screwed between the inner side of the cover 110 and the outer side of the auxiliary reflecting part 150. Is fastened to securely maintain the coupling between the cover 110 and the auxiliary reflector 150.

As described above, the first embodiment of the present invention mounts the auxiliary reflector 150 in the shape of a reflector plate inside or outside the cover 110 of the Yagi antenna to surround the inside or the outside of the cover 110. With this configuration, it improves the linearity, which is a unique characteristic of Yagi antenna, and at the same time, cuts unnecessary signals coming in from the left and right sides of the antenna, that is, signals received from neighboring base stations and repeaters, and signals such as reflected waves and diffraction waves. Only the signal of (LOS; Line Of Sight) is selected as the source signal, and underground / ground inbuilding service is performed.

5 is a coupling diagram illustrating a configuration of an antenna according to a second exemplary embodiment of the present invention, and FIGS. 6 and 7 are plan views illustrating a coupling relationship between a cover and an auxiliary reflecting unit according to the second exemplary embodiment of the present invention.

In this case, the shape of the auxiliary reflector 200 may be combined in a film shape in which the reflective material covers the outer surface of the cover 110 as shown in FIGS. 5 and 6, and the reflection as shown in FIG. 7. The material may also be combined into a film shape covering the inner side of the cover 110. Here, the reflective material forming the film-shaped first reflective film refers to a material having high reflectivity. In addition, the auxiliary reflector 200 formed of the first reflective film having a film shape may be in contact with the outer surface (or the inner surface) of the cover 110, and the outer surface (or the inner surface) of the cover 110 and the auxiliary reflector. A bonding material may be bonded between the inner surface (or the outer surface) of the 200 to maintain the bonding between the cover 110 and the auxiliary reflector 200. That is, the coupling configuration of the cover 110 and the auxiliary reflecting unit 200 is preferably a configuration in which the film-shaped auxiliary reflecting unit 200 is not easily separated from the inner side or the outer side of the cover 110. The auxiliary reflector 200 may also be made of aluminum foil.

On the other hand, the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention.

In the above-described embodiment of the present invention, the auxiliary reflector may be formed in the shape of a cylinder (reflective plate cylinder) corresponding to the shape of the cover 110, or the reflective material may be formed in a film shape to form the inner or outer surface of the cover 110. Although it has been described to cover the, those of ordinary skill in the art can change the configuration of the auxiliary reflector in various forms.

For example, a reflective material having high reflectivity is applied to the inner side (or outer side) of the cover 110 in a paste state (or paint state) to cover the inner side (or outer side) of the cover 110. It can comprise with a 2nd reflective film formed in a shape.

8 is a coupling diagram illustrating a configuration of an antenna according to a third exemplary embodiment of the present invention, and FIGS. 9 and 10 are plan views illustrating a coupling relationship between a cover and an auxiliary reflector according to a third exemplary embodiment of the present invention.

In this case, the shape of the auxiliary reflector 210 may be formed in a shape that covers the outer surface of the cover 110 by applying a reflective material as shown in FIGS. 8 and 9, as shown in FIG. 10. The reflective material may be applied to form a shape covering the inner surface of the cover 110. The auxiliary reflecting portion 210 formed of the second reflecting film is preferably a structure that is not easily peeled off from the inner side (or outer side) of the cover 110.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

As described above, the antenna according to the present invention forms an auxiliary reflecting portion inside or outside the cover of the Yagi antenna to increase the straightness, which is a characteristic of the Yagi antenna, and simultaneously blocks unnecessary signals coming into the left and right sides of the antenna. By providing the ground / building service, it is possible to efficiently improve the call quality of underground / ground inbuilding without significant improvement of the external signal in the mixed signal area of the urban area.

In addition, the investment cost is reduced when the underground / ground inbuilding call quality is improved, and it is effective for data communication and video communication in the future broadband code division multiple access (WCDMA) service.

In addition, only the auxiliary reflector can be installed separately in the existing inbuilding defective area, and the auxiliary reflector can be manufactured separately and exported to overseas.

Claims (9)

cover; A copier provided inside the cover and configured to supply and receive a radio wave by feeding a signal in a service area; A wave guide provided in front of the copier to guide radio waves; A reflector provided at the rear of the copier to reflect radio waves; And an auxiliary reflector mounted along the length of the cover and reflecting radio waves separately from the reflector. The method of claim 1, The auxiliary reflector An antenna having an outer side corresponding to an inner shape of the cover and being formed in a hollow shape and inserted into an inner side of the cover, and having a cylindrical shape having both ends of the longitudinal direction being opened. The method of claim 2, And an inner side of the cover and an outer side of the auxiliary reflector in surface contact. The method of claim 1, The auxiliary reflector An antenna having an inner side corresponding to an outer shape of the cover and being formed in a hollow shape and inserted into an outer side of the cover, wherein both ends of the longitudinal direction are formed in a cylindrical shape. The method of claim 4, wherein And an outer side of the cover and an inner side of the auxiliary reflector in surface contact. The method of claim 1, The auxiliary reflector An antenna, wherein the reflective material is formed of a film-shaped first reflective film. The method of claim 6, The first reflective film An antenna coupled to an outer side or an inner side of the cover to cover an outer side or an inner side of the cover. The method of claim 1, The auxiliary reflector And a reflective material is formed of a second reflective film applied to the cover in a paste state. The method of claim 8, The second reflecting film is An antenna coupled to an outer side or an inner side of the cover to cover an outer side or an inner side of the cover.

Images