KR20100065024A - Integrated multi-band antenna - Google Patents

Abstract

PURPOSE: An integrated multi-band antenna is provided to markedly reduce the number of repeaters and base stations by supplying a plurality of mobile telecommunications services from a single base station and a single repeater. CONSTITUTION: A first antenna device(100) operates in a first frequency band. A second antenna device(200) operates in a second frequency band. A third antenna device(300) operates in a third frequency band. The first to third antenna devices are integrated within the physical space of a single conventional antenna device. The second antenna device is positioned on the upper side of the first antenna device. The third antenna device is positioned on the central part inside the first antenna device and is regularly separated from the second antenna device. Each of the first to third antenna devices has the narrow-band property of operating in one frequency band. Each of the first to third antenna devices has the wideband property of operating in two or more frequency bands.

Description

Integrated multiband antenna {INTEGRATED MULTI-BAND ANTENNA}

The present invention relates to a multiband antenna operating in a multiband, and more particularly, to integrate and transmit and receive a variety of mobile communication services that are being serviced through a single multiband antenna in which a plurality of antenna elements are integrated. To a multiband antenna.

The present invention is derived from a study conducted as part of the IT source technology development project of the Ministry of Knowledge Economy [Task Management Number: 2007-F-041-02, Task name: Intelligent antenna technology development].

Recently, with the development of the next generation mobile communication technology, an integrated service concept capable of simultaneously providing a plurality of mobile communication services has emerged, and accordingly, there is an urgent need for an antenna technology capable of satisfying such an integrated service. In addition, more base station antennas and repeater antennas are required by new mobile communication services that are continuously emerging with the development of next generation mobile communication technologies.

Therefore, more and more base station antennas and repeater antennas have to be installed to provide all mobile communication services, and there is a problem in that the cost of constructing and operating a communication infrastructure including a base station, a repeater, and related facilities continuously increases.

In order to solve the above problems, the structure of a conventional multi-band antenna which has been commercially available until now is shown in FIG. 1.

1 is an exemplary view showing the structure of a conventional multi-band antenna.

As shown in FIG. 1, in the prior art, in order to allow one antenna to operate in multiple bands, antenna elements operating in a single band are fabricated separately, and the plurality of antenna elements manufactured in this manner are spatially separated from each other. Since the method was used, it took up a lot of space, which made it difficult to miniaturize and reduce the weight.

In addition, since each of the conventional antenna elements manufactured in the above manner has narrow band characteristics, one antenna element is manufactured to operate in one mobile communication service band, thereby reducing the number of multibands (the number of mobile communication services). Accordingly, there is a disadvantage in that the size of the multiband antenna increases in proportion.

Accordingly, an object of the present invention is to provide an integrated multi-band antenna that can provide a plurality of communication services through one antenna.

That is, the present invention, in the multi-band antenna that can be applied to the base station and repeater for mobile communication, unlike the conventional multi-band antenna integrated multi-band antenna operating in a plurality of frequency bands in the physical space of one existing antenna element Accordingly, an object of the present invention is to provide an integrated multi-band antenna that can provide a plurality of mobile communication services through a single multi-band antenna, and can be spatially reduced in size and weight as compared with a conventional multi-band antenna.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a multiband antenna, comprising: a first antenna element operating in a first frequency band; A second antenna element operating in a second frequency band; And a third antenna element operating in a third frequency band, wherein the first to third antenna elements are integrated and disposed in a physical space of one existing antenna element. In this case, the second antenna element is located at an upper end of the first antenna element, and the third antenna element is located at a center distance from the second antenna element at a central side in the first antenna element.

On the other hand, another apparatus of the present invention for achieving the above object, the multi-band antenna, the first antenna element operating in the first frequency band; And a second antenna element operating in a second frequency band, wherein the first or second antenna element is integrated and disposed in a physical space of one existing antenna element. In this case, the second antenna element is located at an upper end of the first antenna element. Alternatively, the second antenna element is located at the center of the first antenna element.

As such, the multiband antenna according to the present invention includes two or three or more antenna elements designed to operate individually in two or three or more frequency bands, for example, in order to realize frequency characteristics of the multiband, but spatially By implementing in the space occupied by one existing antenna element, it can be substantially reduced in size and light weight.

The present invention as described above, by integrating a plurality of antenna elements operating in the frequency band of the individual mobile communication service in the physical space occupied by one existing antenna element, it is possible to reduce the size and weight compared to the prior art, In the characteristics of the antenna element, by widening the electrical characteristics of the antenna element to include a plurality of mobile communication services, there is an effect that can provide more mobile communication services in a given space than the prior art.

In addition, the present invention can provide a plurality of mobile communication services through a single multi-band antenna, the polarization of the signal emitted from each antenna element vertical polarization, horizontal polarization, left circular polarization, right circular polarization, etc. There is an effect that can be freely changed.

In addition, when the multi-band antenna of the present invention is applied to a mobile communication base station and repeater, etc., a plurality of mobile communication services can be provided by a single base station and a single repeater, so that the number of temporary base stations and repeaters can be significantly reduced. Therefore, the construction and maintenance costs of base stations and repeaters also have an economic advantage to reduce.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary view showing the overall structure of an integrated multi-band antenna according to an embodiment of the present invention, Figure 3 is an exemplary view showing a frequency band in which each antenna element operates.

As shown in FIG. 2, the integrated multi-band antenna according to the present invention includes a first antenna element 100 operating in a first frequency band and a second frequency located at an upper end of the first antenna element 100. A second antenna element 200 operating in a band, and a predetermined distance (for example, the second antenna element and the third antenna element from the second antenna element 200 at a center side in the first antenna element 100); It is above the minimum distance where electrical coupling does not occur, where the minimum distance is defined according to the operating frequency and the type of antenna, so it is not appropriate to describe it in quantitative terms.) And a third antenna element 300 operating in the third frequency band.

In this case, the first to third antenna elements 100, 200, and 300 may be implemented to have narrow band characteristics operating in one frequency band or wide band characteristics operating in two or more frequency bands. Alternatively, one antenna element may be implemented in various ways, such as having a wide band characteristic operating in two or more frequency bands and the other two antenna elements having narrow band characteristics operating in one frequency band. One multi-band antenna implemented as described above may provide a plurality of mobile communication services.

In addition, the first to third antenna elements 100, 200, and 300 are integrated in a physical space of one existing antenna element, and are implemented in a small size and light weight.

Each frequency band in which the respective antenna elements operate is as shown in FIG. 3, for example.

First, the first frequency band 400 in which the first antenna element 100 operates includes cellular service among mobile communication services. The second frequency band 500 in which the second antenna element 200 operates may include a personal communication service (PCS), wideband code division multiple access (WCDMA), WiMax1, Wi-Fi, and the like. The third frequency band 600 including four mobile communication services and operating the third antenna element 300 includes WiMax2 service.

The operating frequency band shown in FIG. 3 shows an embodiment using the structure of the present invention, and it is within the ordinary knowledge that various designs can be made using the structure of the present invention. Even multiband antennas having a similar structure may be said to belong to the scope of the present invention.

4 is a cutaway perspective view of an integrated multi-band antenna according to a preferred embodiment of the present invention.

As shown in FIG. 4, the third antenna element 300 is a planar antenna having a structure in which signal power is directly supplied through a feed line (coaxial line) 310 in a quadrangular shape.

In addition, the second antenna element 200 is a dipole antenna structure implemented on a dielectric plate, and is vertically formed on the upper, lower, left, and right sides spaced apart from the third antenna element 300 by a predetermined distance. Likewise has a structure that is fed directly through the feed line (coaxial line) 210. In this case, as described above with reference to FIG. 2, the second antenna element 200 has a broadband characteristic including four mobile communication services, and as a result, 1, like the first antenna element 100 and the third antenna element 300. Compared to the narrow band antenna element that provides one mobile communication service, one antenna element can realize more multiband characteristics in a smaller space, and thus can be implemented in a smaller size and lighter weight than the multiband performance. Has

In addition, the first antenna element 100 is a flat antenna having a structure in which signal power is directly supplied by a feed line (coaxial line) 110 in a quadrangular shape like the third antenna element 300. At this time, the second antenna element 200 is located at the upper end of the rectangular radiation patch of the first antenna element 100, the third antenna element 300 is in the center of the rectangular radiation patch of the first antenna element 100 The second antenna element 200 and the third antenna element 300 should be designed to minimize the influence on the electrical characteristics such as the radiation pattern of the first antenna element 100.

Meanwhile, the first antenna element 100 and the third antenna element 300 may be implemented in various flat shapes, such as circular, in addition to a quadrangular shape.

As described above, in the integrated multi-band antenna according to the present invention, the second antenna element 200 is disposed on the upper end of the existing first antenna element 100 and the third in the center of the first antenna element 100. By arranging and integrating the antenna element 300, antenna elements operating in different frequency bands may be located in a space occupied by the first antenna element 100.

Accordingly, unlike the conventional method, which requires a plurality of antenna elements operating in each service band in order to provide a plurality of mobile communication services, substantially one multiband antenna may simultaneously provide various mobile communication services. In addition to the advantages that can be, there is a secondary advantage that can be reduced in size and weight compared to the prior art.

5 is an exemplary view showing a lower end portion of an integrated multi-band antenna according to an exemplary embodiment of the present invention.

FIG. 5 shows the position of a feed line for feeding signal power to three antenna elements integrated in the multi-band antenna structure of the present invention.

First, in the first antenna element 100, four feed lines are connected to the top 111, bottom 113, left 114, and right 112 of the rectangular radiation patch. In addition, in the second antenna element 200 including four radiating elements, four feed lines are connected to the top 211, the bottom 213, the left 214, and the right 212, and the third antenna element 300. ) Also has a similar feed structure in which four feed lines are connected to the upper 311, lower 313, left 314, and right 312.

By appropriately varying the phase of the signal power excited from the four feed lines located in each antenna element, polarization of the signal radiated from each antenna element into free space can be freely controlled. 1].

[Table 1] below shows the positions of four feed lines connected to the first antenna element 100, the second antenna element 200, and the third antenna element 300 to the upper side, the lower side, the left side, and the right side according to their relative positions. When the signal power is not applied through the feeder, it is indicated by '×'. In addition, the relative position of the feed line connected to each antenna element will be described with reference to FIG.

All three antenna elements 100, 200, and 300 described above have the same operating principle. Therefore, in the present invention, for convenience of description, the description of the other two antenna elements 200 and 300 will be replaced by the operation principle of the first antenna element 100 among the three antenna elements.

As shown in Table 1 below, the reference phase of the signal power excited from the four power feed lines 111 to 114 located in the first antenna element 100 is defined as θ.

For example, the phase of the signal power excited from the upper feed line 111 is θ, and the phase of the signal power excited from the lower feed line 113 is θ + 180 ° and from the left feed line 114 and the right feed line 112. When there is no signal power to be excited, the polarization of the signal radiated from the first antenna element 100 has a vertical polarization. Another case of having a vertical polarization can be easily understood by referring to the contents of [Table 1] below.

In another case, the phase of the signal power excited from the left feed line 114 is θ, the phase of the signal power excited from the right feed line 112 is θ + 180 °, and the upper feed line 111 and the lower feed line 113 are shown. When there is no signal power excited from), the polarization of the signal radiated from the first antenna element 100 has a horizontal polarization. As in the case of the vertical polarization described above, another case in which the horizontal polarization can emit can be easily understood by referring to the contents of Table 1 below.

As another case, the signal power phase excited from the upper feed line 111 is θ, the signal power excited from the lower feed line 113 is θ + 180 °, and the signal power excited from the left feed line 114 When the phase is θ + 90 ° and the phase of the signal power excited from the right feed line 112 has θ + 180 ° + 90 °, the polarization of the signal radiated from the first antenna element 100 has a left circular polarization. . In the same manner, when the phases of the signal powers excited by the four feed lines are varied, right-circular polarization can be generated.

Position of feed line and phase of feed signal Upper side
(111,211,311) Lower side
(113,213,313) left side
(114,214,314) right
(112,212,312) partiality θ θ + 180 ° × × Vertical polarization θ + 180 ° θ × × Vertical polarization θ × × × Vertical polarization × θ × × Vertical polarization × × θ θ + 180 ° Horizontal polarization × × θ + 180 ° θ Horizontal polarization × × θ × Horizontal polarization × × × θ Horizontal polarization θ θ + 180 ° θ + 90 ° θ + 180 ° + 90 ° Left circle polarization θ + 180 ° θ θ + 180 ° + 90 ° θ + 90 ° Left circle polarization θ × θ + 90 ° × Left circle polarization × θ × θ + 90 ° Left circle polarization θ + 90 ° θ + 180 ° + 90 ° θ θ + 180 ° Uwon Polarization θ + 180 ° + 90 ° θ + 90 ° θ + 180 ° θ Uwon Polarization θ + 90 ° × θ × Uwon Polarization × θ + 90 ° × θ Uwon Polarization

On the other hand, the plurality of mobile communication service signal power received through each antenna element of the multi-band antenna described above, respectively, by the other device (not shown in the figure, for example, a filter, etc.) connected through the feed line with the antenna element Independent mobile communication service signal power is separated and processed.

On the other hand, as another embodiment of the present invention, an integrated multi-band antenna according to another embodiment of the present invention, the first antenna element operating in the first frequency band, and the second antenna located on the upper end of the first antenna element And a second antenna element operating in the frequency band.

In this case, the first or second antenna element may be implemented to have a narrow band characteristic operating in one frequency band or a wide band characteristic operating in two or more frequency bands. Alternatively, one antenna element may have a wideband characteristic operating in two or more frequency bands, and the other antenna element may have a narrowband characteristic operating in one frequency band. One multi-band antenna implemented as described above may provide a plurality of mobile communication services.

In addition, the first or second antenna element is integrated in the physical space of one conventional antenna element is implemented to be small and light weight.

On the other hand, as another embodiment of the present invention, the integrated multi-band antenna according to another embodiment of the present invention, the first antenna element operating in the first frequency band, and is located in the center within the first antenna element And a second antenna element operating in a second frequency band.

In this case, the first or second antenna element may be implemented to have a narrow band characteristic operating in one frequency band or a wide band characteristic operating in two or more frequency bands. Alternatively, one antenna element may have a wideband characteristic operating in two or more frequency bands, and the other antenna element may have a narrowband characteristic operating in one frequency band. One multi-band antenna implemented as described above may provide a plurality of mobile communication services.

In addition, the first or second antenna element is integrated in the physical space of one conventional antenna element is implemented to be small and light weight.

As described above, the multi-band antenna according to the present invention can provide a plurality of mobile communication services through a single antenna, vertical polarization, horizontal polarization, left circular polarization of the polarization of the signal emitted from each antenna element It has a structural feature that can be freely variable, such as, and right circular polarization.

Through the multi-band antenna element of the present invention having the above-described structural features, it is possible to provide a variety of mobile communication services to one multi-band antenna, through which a plurality of base station antennas to operate to provide a plurality of mobile communication services and By drastically reducing the size of the repeater antenna and its associated facilities, it has the important advantage of reducing the cost of installing and maintaining the communication infrastructure.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention can be used for base station antennas and repeater antennas for mobile communication.

1 is an exemplary view showing the structure of a conventional multi-band antenna,

2 is an exemplary view showing the overall structure of an integrated multi-band antenna according to an embodiment of the present invention,

3 is an exemplary view illustrating a frequency band in which each antenna element operates;

4 is a cutaway perspective view of an integrated multi-band antenna according to an embodiment of the present invention;

5 is an exemplary view showing a lower end portion of an integrated multi-band antenna according to an exemplary embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

100 first antenna element 200 second antenna element

300: third antenna element

Claims (12)

In a multiband antenna, A first antenna element operating in a first frequency band; A second antenna element operating in a second frequency band; And A third antenna element operating in a third frequency band, The first to third antenna elements, the multi-band antenna, characterized in that integrated in the physical space of the existing antenna element. The method of claim 1, The second antenna element is located at the upper end of the first antenna element, The third antenna element is a multi-band antenna, characterized in that located on the center side in the first antenna element spaced apart from the second antenna element a predetermined distance. The method of claim 2, Each of the first to third antenna elements, A multiband antenna having narrowband characteristics operating in one frequency band or broadband characteristics operating in two or more frequency bands. 4. The method according to any one of claims 1 to 3, The first antenna element is a flat antenna having a structure in which signal power is supplied by a first feed line, The second antenna element is a dipole antenna having a structure in which signal power is supplied by a second feed line, and is spaced apart from the third antenna element at a predetermined distance from above, below, left, and right of the upper end of the first antenna element. Placed vertically, And the third antenna element is a planar antenna having a structure in which signal power is supplied by a third feed line. 4. The method according to any one of claims 1 to 3, And controlling a polarization of a signal radiated into free space by varying a phase of signal power supplied to each of the first to third antenna elements. In a multiband antenna, A first antenna element operating in a first frequency band; And A second antenna element operating in a second frequency band, The first or second antenna element, the multi-band antenna, characterized in that integrated in the physical space of one existing antenna element arranged. The method of claim 6, The second antenna element is located in the upper end of the first antenna element, multi-band antenna. The method of claim 7, wherein The first antenna element is a flat antenna having a structure in which signal power is supplied by a first feed line, The second antenna element is a dipole antenna having a structure in which signal power is supplied by a second feed line, wherein the second antenna element is vertically disposed at upper, lower, left, and right sides of an upper end of the first antenna element. antenna. The method of claim 6, And the second antenna element is centrally located within the first antenna element. The method of claim 9, The first antenna element is a flat antenna having a structure in which signal power is supplied by a first feed line, And said second antenna element is a planar antenna having a structure in which signal power is supplied by a second feed line. The method according to any one of claims 6 to 10, Each of the first or second antenna elements, A multiband antenna having narrowband characteristics operating in one frequency band or broadband characteristics operating in two or more frequency bands. The method according to any one of claims 6 to 10, And controlling a polarization of a signal radiated into free space by varying a phase of signal power supplied to each of the first and second antenna elements.

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