KR101605867B1 - Array antenna optimized for a base station communication system - Google Patents

Abstract

An antenna is disclosed that shares some of the radiators for a plurality of frequency bands. The antenna includes at least one first radiator for a first frequency band, at least one second radiator for a second frequency band, and a third radiator. Here, the third radiator is used not only to implement the first frequency band but also to implement the second frequency band.

Description

[0001] ARRAY ANTENNA OPTIMIZED FOR A BASE STATION COMMUNICATION SYSTEM [0002]

The present invention relates to an array antenna optimized for a base station communication system.

An array antenna used in a base station generally includes radiators for respective frequency bands as shown in Korean Patent Laid-Open Publication No. 2005-0088753. Therefore, when implementing a plurality of frequency bands, the size and weight of the antenna have to be increased.

The present invention provides an antenna that shares some of the radiators for a plurality of frequency bands.

According to an aspect of the present invention, there is provided an antenna comprising: at least one first radiator for a first frequency band; At least one second radiator for a second frequency band; And a third radiator. Here, the third radiator is used not only to implement the first frequency band but also to implement the second frequency band.

An antenna according to another embodiment of the present invention includes at least one first radiator; And at least one second radiator. Here, the first radiator and the second radiator are used for the first frequency band, and when the second frequency band is implemented, only the second radiator among the radiators is used.

An antenna according to another embodiment of the present invention includes radiators. Here, some of the radiators operate when a first frequency band is implemented, and some of the radiators operate when a second frequency band is implemented, and at least one of the radiators operates when the first frequency band is implemented And are all used when implementing the second frequency band.

An antenna according to another embodiment of the present invention includes at least one radiator commonly used for a plurality of frequency bands; And a phase shifter for supplying power to the radiator.

An antenna in the present invention can share some radiators for a plurality of frequency bands, thus reducing the size and weight of the antenna and lowering the cost of manufacturing the antenna.

1 is a view schematically showing an antenna according to a first embodiment of the present invention.
2 is a view schematically showing an antenna according to a second embodiment of the present invention.
3 is a view schematically showing an antenna according to a third embodiment of the present invention.
4 schematically shows an antenna, for example a multi-band polarized antenna, according to a fourth embodiment of the present invention.
5 is a view schematically showing an antenna according to a fifth embodiment of the present invention.
6 is a view showing a beam pattern of an antenna according to an embodiment of the present invention.

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

The present invention relates to an antenna, for example, an array antenna for a base station, and proposes a method of sharing some of the radiators for a plurality of frequency bands. As a result, the size and weight of the antenna can be reduced and manufacturing costs can be lowered.

Hereinafter, various structures of the antenna of the present invention will be described in detail with reference to the accompanying drawings.

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

Referring to FIG. 1, the antenna of the present embodiment includes at least one first radiator 100, at least one second radiator 102, a third radiator 104, a first phase shifter 106, 2 phase shifter 108, and a diplexer 110. [

Although not shown, the emitters 100, 102, and 104, the phase shifters 106 and 108, and the diplexer 110 may be arranged on a reflector (not shown) that is a conductor. On the other hand, the radiators 100, 102 and 104, the phase shifters 106 and 108 and the diplexer 110 may be arranged on the same side of the reflector and on the other side. For example, the radiators 100, 102 and 104 and the diplexer 110 may be arranged on the upper surface of the reflector, and the phase shifters 106 and 108 may be arranged on the back surface of the reflector. On the other hand, the connection between the radiators 100, 102 and 104 in FIG. 1 and the phase shifters 106 and 108, the connection between the phase shifters 106 and 108 and the diplexer 110, The connection between the die 104 and the diplexer 110 may be via a cable or a conductor pattern. The connections are not limited as long as they electrically connect the components.

The phase shifters 106 and 108 transmit input power to the radiators 100, 102 or 104 and vary the phase of each power (RF signal) delivered to the radiators 100, 102 or 104 Role. The structure of these phase shifters 106 and 108 is not limited to a particular structure. However, from the viewpoint of power supply, it can be said that the power supply element, not the phase shifter, is electrically connected to the radiators.

The diplexer 110 refers to an element that transmits the RF signal to the third radiator 104 while preventing the two RF signals from interfering with each other.

The first radiators 100 are elements for a first frequency band, and the second radiators 102 are elements for a second frequency band.

The third radiator 104 may be used for both the first frequency band and the second frequency band and may be arranged between the first radiators 100 and the second radiators 102, for example.

For example, the first radiators 100 and the third radiator 104 may be used when the antenna outputs a radiation pattern of a high frequency band. On the other hand, the second radiators 102 and the third radiator 104 may be used when the antenna outputs a radiation pattern of a low frequency band.

That is, the third radiator 104 is commonly used to implement the first frequency band and the second frequency band.

First, the overall structure of the antenna will be described.

The first phase shifter 106 is electrically connected to the first radiators 100 and the third radiator 104. However, the first phase shifter 106 is electrically connected to the third radiator 104 through the diplexer 110. According to one embodiment, the first radiators 100 and the third radiator 104 may be arranged on the reflector at regular intervals, and the power supplied to the first radiators 100 and the third radiator 104 May have certain rules. For example, the phases of the power provided to the first radiators 100 and the third radiator 104 may be sequentially different by?.

The second phase shifter 108 is electrically connected to the second radiators 102 and the third radiator 104. However, the second phase shifter 108 is electrically connected to the third radiator 104 through the diplexer 110. According to one embodiment, the second radiators 102 and the third radiator 104 can be arranged on the reflector at regular intervals, and the power supplied to the second radiators 102 and the third radiator 104 May have certain rules. For example, the phases of the power provided to the second radiators 102 and the third radiator 104 may be sequentially different by?.

Let's look at the process of outputting the radiation pattern in this structure.

When a radiation pattern of the first frequency band, for example, 2.6 GHz, is output, the power source (not shown) supplies electric power to the first radiators 100 through the first phase shifter 106, Power can be supplied to the third radiator 104 through the phase shifter 106 and the second conductor line 122 of the diplexer 110. [ At this time, the power source does not supply power to the second phase shifter 108. As a result, the antenna can output the radiation pattern of the first frequency band.

The power source supplies power to the second radiators 102 through the second phase shifter 108 and supplies power to the second phase shifter 108 And the first conductor line 120 of the diplexer 110 to the third radiator 104. At this time, the power source does not supply power to the first phase shifter 106. As a result, the antenna can output the radiation pattern of the second frequency band.

In summary, the antenna of the present embodiment can include a radiator 104 that can be used in a plurality of frequency bands.

In the conventional antenna, the radiators for the first frequency band exist separately and the radiators for the second frequency band exist separately. Therefore, the number of emitters must increase in proportion to the frequency band to be implemented.

However, the antenna of the present invention includes at least one radiator 104 that can be used jointly in a plurality of frequency bands. As a result, the number of emitters in the antenna of the present invention may be smaller than the number of emitters in a conventional antenna. Therefore, the size and weight of the antenna of the present invention can be reduced and the manufacturing cost can be lowered.

Although not mentioned above, the third radiator 104 may have the same structure as the first radiator 100 or may have the same structure as the second radiator 102. In FIG. 1, the third radiator 104 has the same structure as the second radiator 102. Of course, the third radiator 104 may have a different structure from the first radiator 100 and the second radiator 102. The structure of the third radiator 104 may be adaptively designed according to a frequency band to be implemented.

2 is a view schematically showing an antenna according to a second embodiment of the present invention.

2, the antenna of the present embodiment includes at least one first radiator 200, at least one second radiator 202, third radiators 204, a first phase shifter 206, a second phase shifter 206, A second diplexer 208, a first diplexer 210, and a second diplexer 212.

Unlike the first embodiment in which only one radiator 104 is jointly used for frequency bands, a plurality of third radiators 204 may be used jointly for frequency bands in this embodiment.

A diplexer 210 or 212 is arranged between each third radiator 204 and the corresponding phase shifter 206 or 208. That is, the third radiator 204 is electrically connected to the phase shifter 206 or 208 through the diplexer 210 or 212.

When the antenna outputs a radiation pattern of a first frequency band, for example, 2.6 GHz, the first phase shifter 206 supplies power to the first radiators 200, and the first diplexer 210 And the third radiator 204 of the second diplexer 212 is connected to the third radiator 204 via the fourth conductor line 232 of the second diplexer 212, Power can be supplied.

When the antenna outputs a radiation pattern of a second frequency band, for example, 1.8 GHz, the second phase shifter 208 supplies power to the second radiators 202, and the first diplexer 210 And the third radiator 204 of the second diplexer 212 is connected to the third radiator 204 via the third conductor line 230. The third radiator 204 is connected to the third radiator 204 via the third conductor line 230, Power can be supplied.

That is, a plurality of third radiators 204 may be used jointly for a plurality of frequency bands. Here, the third radiators 204 may have the same structure as the first radiator 200 or the second radiator 202. Alternatively, one of the third radiators 204 may have the same structure as the first radiator 200, and the other third radiator 204 may have the same structure as the second radiator 202.

Referring to Figures 1 and 2, the antenna may comprise at least one third radiator that can be used in common for a plurality of frequency bands. Here, the third radiator may be arranged in series with the first radiators and the second radiators.

3 is a view schematically showing an antenna according to a third embodiment of the present invention.

3, the antenna of the present embodiment includes at least one first radiator 300, at least one second radiator 302, third radiators 304a and 304b, a first phase shifter 306, A phase shifter 308, a first diplexer 310 and a second diplexer 312.

Unlike in the first and second embodiments in which the radiators are arranged in series, in the antenna of this embodiment, the first radiators 300 and the second radiators 302 are arranged in parallel, and the third radiators 304a and 304b may be staggered with the first radiators 300 and the second radiators 302. [

Since the method of supplying power to the radiators 300, 302, and 304 is similar to that in the second embodiment, a description thereof will be omitted.

According to one embodiment, the third radiators 304a and 304b may have the same structure as the second radiator 302 for the low frequency band.

Above, there are two third radiators 304a and 304b, but there may be one third radiator. In this case, four first radiators are arranged sequentially, four second radiators are arranged in parallel with each other, and one third radiator is arranged in parallel with the first radiators, May be arranged in a staggered manner.

Although the third radiators 304a and 304b are arranged to be staggered with the first radiators 300 and the second radiators 302 in the above description, the third radiators 304a and 304b are arranged in series with the first radiators 300 or the second radiators 302 .

4 schematically shows an antenna, for example a multi-band polarized antenna, according to a fourth embodiment of the present invention.

Referring to FIG. 4, the antenna is a dual band dual polarization antenna (DBDP antenna) of a multi-band polarized antenna, and includes radiators 400, 404 and 406 for a high frequency band and a fourth Emitters < RTI ID = 0.0 > 402 < / RTI >

The radiators 400, 404 and 406 may be arranged within the fourth radiators 402 or between the fourth radiators 402.

The first radiators 400 and the third radiator 406 of the radiators 400, 404 and 406 for the high frequency band can be used when implementing, for example, the 2.6 GHz band, and the second radiators 404 and 406, The third radiator 406 may be used, for example, to implement the 1.8 GHz band. That is, the third radiator 406 may be shared for a plurality of frequency bands. Here, the third radiator 406 may have the same structure as the second radiator 404.

That is, the antenna may implement three frequency bands and may share a third radiator 406. [

5 is a view schematically showing an antenna according to a fifth embodiment of the present invention.

5, the antenna of the present embodiment includes at least one first radiator 500, at least one second radiator 502, a first phase shifter 504, a second phase shifter 506, A Divider 508, and one or more diplexers 510. [

The first radiators 500 and the second radiators 502 are arranged in parallel, that is, facing each other. According to one embodiment, the first radiators 500 and the second radiators 502 may have the same structure.

Unlike in other embodiments, the second radiators 502 may independently implement the second frequency band and may implement the first frequency band together with the first radiators 500. [ That is, all of the second radiators 502 may be shared for the first frequency band.

When the antenna outputs the radiation pattern of the first frequency band, the first phase shifter 504 outputs power to the first radiators 500 through the first conductive lines 520 of the distributors 508 And can supply power to the second radiators 502 through the second conductive lines 520 of the distributors 508 and the fourth conductive lines 532 of the diplexers 510 .

The second phase shifter 506 is connected to the second radiators 502 through the third conductive lines 530 of the diplexers 510 so as to output radiation patterns of the second frequency band, Power can be supplied. At this time, the first phase shifter 504 may not operate.

According to the first to fifth embodiments, the antennas include a plurality of emitters, wherein some of the emitters operate when the first frequency band is implemented, and when some of the emitters At least one of the emitters may be used both when implementing the first frequency band and when implementing the second frequency band.

According to one embodiment, a radiator used both when implementing the first frequency band and when implementing the second frequency band may have a different structure from some of the radiators.

According to another embodiment, the power supplied to the radiator, which is used both when implementing the first frequency band and when implementing the second frequency band, differs when implementing the first frequency band and when implementing the second frequency band. . For example, different phase shifters may supply power to the shared radiator for different frequency bands.

According to another embodiment, the radiators used both when implementing the first frequency band and when implementing the second frequency band may be arranged adjacent to each other.

According to another embodiment, the emitters used when implementing the first frequency band and when implementing the second frequency band may be different according to the first frequency band and the second frequency band. For example, when the first frequency band is 1.8 GHz and the second frequency band is 2.6 GHz, a shared radiator and a shared radiator when the first frequency band is 1.2 GHz and the second frequency band is 2.2 GHz can be different.

6 is a view showing a beam pattern of an antenna according to an embodiment of the present invention.

FIG. 6 (A) shows a beam pattern in an antenna in which first radiators and second radiators are arranged in series without sharing a radiator, and FIG. 6 (B) shows a beam pattern The beam pattern in the antenna of one embodiment is shown.

Referring to FIGS. 6A and 6B, it can be seen that the conventional antenna and the antenna of the present invention output similar beam patterns. That is, it can be seen that the antenna of the present invention can smoothly provide a communication service while reducing the size and weight. Of course, the ratio of the power supplied to the radiators in the conventional antenna and the antenna of the present invention may be different.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the following claims.

100, 200, 300, 400, 500: first radiator
102, 202, 302, 404, 502:
104, 204, 304, 406: a third radiator
106, 206, 306, 504: a first phase shifter
108, 208, 308, 506: a second phase shifter
110, 210, 212, 310, 312, 510: diplexer
402: fourth radiator
508: Dispenser

Claims (4)

A base station antenna in which a plurality of radiators are arranged on a reflector and the plurality of radiators are supplied with power through at least two phase shifters,
The plurality of radiators may include:
At least one first radiator for a first frequency band;
At least one second radiator for a second frequency band; And
At least one third radiator for the first frequency band and the second frequency band,
Wherein the first radiator and the third radiator are provided with power from the first phase shifter when radiating in the first frequency band and the second radiator and the third radiator are supplied with power from the first phase shifter when radiating in the second frequency band, And power is provided from the phase shifter.
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