KR20060087696A - Device for expanding antenna of the wireless repeater - Google Patents

Abstract

The present invention relates to an antenna extension apparatus of a mobile communication repeater, and more particularly, in a mobile communication repeater for transmitting a radio signal between a base station and a mobile station through a plurality of antennas arranged in at least two directions, the plurality of radio signals of the base station And an antenna extension device including a divider for branching and transmitting to a plurality of antennas and transmitting a wireless signal received through the antenna to a base station, and a low noise amplifier for low noise amplifying and transmitting the wireless signal received from the plurality of antennas to the splitter. do. Therefore, in the mobile communication repeater antenna extension apparatus of the present invention, the noise figure generated by the splitter is compensated by low noise amplification of the radio signal received from the mobile station, thereby reducing the received noise figure in the uplink as much as possible.

Telecom Repeater, Antenna Expansion, Low Noise Amplifier

Description

Antenna expansion device for mobile communication repeater {DEVICE FOR EXPANDING ANTENNA OF THE WIRELESS REPEATER}

1A to 1C are diagrams showing examples of various mobile communication repeaters according to the prior art;

2A and 2B are diagrams illustrating examples of an antenna extension apparatus of a mobile communication repeater according to the prior art;

3A and 3B are diagrams illustrating examples of an antenna extension apparatus of an RF repeater according to an embodiment of the present invention;

4A and 4B are diagrams illustrating examples of an antenna extension apparatus of a frequency conversion repeater according to another embodiment of the present invention;

5A and 5B are diagrams illustrating examples of an antenna extension apparatus of an optical repeater according to another embodiment of the present invention;

6 is a configuration diagram showing an example of an antenna expansion device according to the present invention;

7 is a configuration diagram showing another example of an antenna expansion device according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: base station 110: RF repeater

120: mobile station 200: frequency conversion repeater

210: donor 220: remote

300: optical repeater 310: master

330: slave 114, 224, 332: antenna expansion unit

118, 228, 338: antenna extension device for receive diversity

The present invention relates to a mobile communication repeater, and more particularly, to an antenna extension apparatus of a mobile communication repeater extending at least two or more antennas.

In general, repeaters of mobile communication networks are mainly used in areas where it is not suitable to install a base station or operate a relay vehicle in a shielded space or a small blocked area (underground mall, tunnel, underground parking lot, etc.). The wireless signal between the base station and the mobile station is extracted in the dead zone by extracting and amplifying a weak radio signal to be relayed from the radio signal of the base station in a shielded space or a shadow area, and then radiating it back to the mobile station through a retransmission antenna. It acts as a relay.

1A to 1C are diagrams showing examples of various mobile communication repeaters according to the prior art.

Figure 1a shows a prior art RF repeater, the RF repeater 20 amplifies a radio signal (RF) sent from the base station 10 in the downlink amplified and sent to the mobile station and the radio signal sent from the mobile station in the uplink base station Amplify to (10) and send.

FIG. 1B illustrates a frequency conversion repeater according to the prior art, wherein the frequency conversion repeater 30 converts a radio signal sent from the base station 10 in a donor 32 in a downlink to a remote 34 Amplify and send the signal to the mobile station. In the uplink, the radio signal transmitted from the mobile station is amplified and sent to the donor 32 by the frequency conversion at the remote 34, and is converted to the original frequency at the donor 32 and transmitted to the base station 10. As an example, Korean Patent Laid-Open Publication No. 2003-0049031 (published on June 25, 2003) discloses an intermediate frequency repeater capable of controlling power between a donor module and a remote module and a power control method thereof.

1C is a conventional optical repeater, wherein the optical repeater 40 is divided into a master 42 and a slave 46, and the master 42 is located in the base station 10 and the slave 46. ) Is located in the service area and these master 42 and slave 46 are connected to each other by optical fiber 44. The optical repeater 40 receives and amplifies the radio signal transmitted from the base station 10 at the downlink at the master 42 and sends it to the slave 46 through the optical fiber 44 and is transmitted from the slave 46. Amplifies the radio signal and transmits it to the mobile station. In the uplink, the wireless signal sent from the mobile station is amplified by the slave 46 and transmitted to the master 42 through the optical fiber 44, and the amplified wireless signal transmitted from the master 42 is transmitted to the base station 10. .

However, in the various mobile communication repeaters, antennas are branched in various directions such as two directions and three directions for each service area in order to increase transmission / reception sensitivity during downlink or uplink.

2A and 2B are diagrams illustrating examples of an antenna extension apparatus of a mobile communication repeater according to the prior art.

Referring to FIG. 2A, the antenna expansion apparatus of the conventional optical repeater includes a plurality of antennas 50, 51, arranged in at least two directions using the distributors 48, 49 at the final input / output ports of the slave 46. … 59). In this case, reference numeral 49 denotes a distributor used for relay for reception diversity, and the antennas 55, 57, and 59 connected to the distributor 49 are also antennas for reception diversity.

Referring to FIG. 2B, the antenna extension apparatus of the conventional RF repeater and the frequency conversion repeater includes reception diversity arranged in at least two directions using the dividers 22 and 24 at the input ports of the last stages of the repeaters 20 and 34. Connect a plurality of antennas 50, 51,... 59. In this case, reference numeral 22 denotes a divider used for relay for receive diversity, and antennas 55, 57, and 59 connected to the divider 22 are also relay antennas for receive diversity.

However, in the antenna expansion device of the mobile communication repeater according to the prior art, the insertion loss caused by the splitter during the downlink is about 3dB to 5dB, so that the loss of radio signals transmitted from the mobile communication repeater to the mobile station is adjusted by adjusting the output level of the repeater. To compensate. However, there was a difficulty in compensating for the noise figure generated by the radio signal transmitted from the mobile station to the base station during the uplink through the distributor.

On the other hand, the mobile communication base station does not use a distributor, but it uses TTL (Tower Top LNA) to compensate the line from the base station to the antenna, but it is not easy to maintain because it needs to be installed on the tower of the base station. not. Moreover, in case of mobile communication repeater, it is difficult to install TTL (Tower Top LNA) in each antenna because it uses branched antennas, and it is also necessary to separate the place installed to supply power to TTL installed on the tower or pole. There are several problems, such as the need to supply power.

Therefore, in the mobile communication repeater according to the prior art, research and development are required to reduce the noise figure as much as possible in the uplink without using a TTL when branching a radio signal to a plurality of antennas.

An object of the present invention is to compensate for the noise figure generated by the splitter by low noise amplifying the radio signal received from the mobile station in order to solve the above problems of the prior art antenna of the mobile communication repeater that can reduce the received noise figure in the uplink as much as possible An extension device is provided.

In order to achieve the above object, the present invention provides a mobile communication repeater for transmitting a radio signal between a base station and a mobile station through a plurality of antennas arranged in at least two directions, branching the radio signal of the base station to a plurality of antennas And a divider for transmitting and transmitting the wireless signal received through the antenna to the base station, and a low noise amplifier for low noise amplifying and transmitting the wireless signal received from the plurality of antennas to the splitter.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

3A and 3B are diagrams illustrating examples of an antenna extension apparatus of an RF repeater according to an embodiment of the present invention.

3A illustrates an example of an antenna extension apparatus of an RF repeater according to an exemplary embodiment of the present invention, in which an antenna extension apparatus 114 is installed at a final input / output port of an RF repeater 110 and includes at least two directions. It is connected to a plurality of antennas (116a, 116b, 116c) arranged in the.

The antenna extension device 114 of the present invention is composed of a splitter (for example, two or three splitters) (not shown), and a radio signal transmitted from a mobile station among a plurality of radio signals (RF) for distribution. A low noise amplifier (LNA) (not shown) for low noise amplifying (RF).

The RF repeater 110 according to the present embodiment configured as described above receives the radio signal RF transmitted from the base station 100 through the antenna 112 during downlink, amplifies it to a predetermined level, and at least through the antenna extension device 114. It branches to two or more radio signals and sends them to the mobile station 120 through a plurality of antennas 116a, 116b, 116c arranged in at least two directions. In the uplink, the radio signal RF transmitted from the mobile station 120 is received through a plurality of antennas 116a, 116b, and 116c arranged in at least two directions, and received through the antenna extension device 114. A) low noise amplification is transmitted to the RF repeater 110, and the RF repeater 110 amplifies it to a predetermined level and transmits it to the base station 100 through the antenna 112.

3B illustrates another example of an antenna extension device of an RF repeater according to an embodiment of the present invention, and the antenna extension device 118 for reception diversity is installed in the RF repeater 110 of FIG. 3A. Accordingly, another antenna extension device 118 is installed at the final input port for reception diversity of the RF repeater 110 and a plurality of antennas for reception diversity arranged in at least two directions in the antenna extension device 118 ( 119a, 119b, and 119c are connected.

An antenna expansion device 118 for receive diversity of the present invention also includes a divider (not shown) and a low noise amplifier (not shown) that amplifies a radio signal (RF) transmitted from the mobile station 120 to provide a divider with low noise. It includes.

Another example of the RF repeater 110 of the present embodiment configured as described above is a plurality of antennas 119a, 119b, and 119c for receive diversity in which radio signals RF transmitted from the mobile station 120 are arranged in at least two directions during uplink. A low noise amplification of the radio signal received through the other antenna extension device 118 to the RF repeater 110, amplifies it to a predetermined level in the RF repeater 110, and amplifies the antenna 112. Transmit to base station 100 via.

Here, reference numeral 102 denotes an antenna of the base station 100 and 122 denotes an antenna of the mobile station 120.

Therefore, the RF repeater according to an embodiment of the present invention compensates for the noise insertion loss caused by the splitter during uplink of a radio signal transmitted from the mobile station to the base station through the repeater by the antenna extension device including the low noise amplifier in the low noise amplifier. . For example, a divider can compensate for noise losses of about 3 dB or more with a low noise amplifier (gain is 10 dB to 13 dB) and a divider with a low noise amplifier (gain is 10 dB to 15 dB) for a divider of more than about 5 B. The loss can be compensated.

4A and 4B are diagrams illustrating examples of an antenna extension apparatus of a frequency conversion repeater according to another embodiment of the present invention.

4A illustrates an example of an antenna extension device for a frequency conversion repeater according to another embodiment of the present invention, wherein the antenna extension device 224 is connected to a remote input / output port of the remote terminal 220 of the frequency conversion repeater 200. A plurality of antennas 226a, 226b, and 226c installed in at least two directions for transmitting / receiving a radio signal with the mobile station 120 are connected to the antenna extension device 224.

The antenna extension device 224 of the present invention is composed of a divider (for example, 2 divider or 3 divider) (not shown), and low noise amplifies a radio signal (RF) transmitted from the mobile station 120 and provides the divider with low noise. An amplifier (not shown).

The frequency conversion repeater 200 according to another embodiment of the present invention configured as described above receives a radio signal (RF) sent from the base station 100 during downlink through the antenna 212 of the donor 210 and receives a frequency in the donor 210. It converts and amplifies it to a predetermined level and transmits it to the remote 220. Mobile station 120 through a plurality of antennas (226a, 226b, 226c) converted to the original frequency at the remote 220 and branched into at least two or more radio signals through the antenna extension device 224 and disposed in at least two directions. Send it to

In the uplink, the radio signal RF transmitted from the mobile station 120 is received through any one of a plurality of antennas 226a, 226b, and 226c arranged in at least two directions and received through the antenna extension device 224. The wireless signal RF is low noise amplified and transmitted to the remote 220. The frequency conversion at the remote 220 is transmitted to the donor 210, and converted to the original frequency at the donor 210 and amplified to a predetermined level and transmitted to the base station 100 through the antenna 212.

4b shows another example of an antenna extension apparatus for a frequency conversion repeater according to another embodiment of the present invention, which is different from the terminal input port for receiving diversity of the remote 220 of the frequency conversion repeater 200 of FIG. An antenna extension device 228 is installed, and a plurality of antennas 229a, 229b, and 229c for reception diversity arranged in at least two directions are connected to the antenna extension device 228.

An antenna expansion device 228 for reception diversity according to the present invention also includes a divider (for example, a two- or three-divider) (not shown) and low-noise amplifies a radio signal (RF) transmitted from the mobile station 120. A low noise amplifier (not shown) provided to the distributor.

Another example of the frequency conversion repeater 200 according to another embodiment of the present invention configured as described above is a plurality of antennas 229a for receive diversity in which radio signals (RF) sent from the mobile station 120 are arranged in at least two directions during uplink. 229b and 229c receive a low noise amplified radio signal (RF) received through the antenna extension device 224 and transmits to the remote 220. The radio signal received from the remote 220 is converted into frequency and transmitted to the donor 210, the donor 210 converts to the original frequency, amplified to a predetermined level, and transmitted to the base station 100 through the antenna 212.

Reference numeral 102, which is not described herein, is an antenna of the base station 100 and 214 is an antenna of the donor. And 222 is an antenna of the remote and 122 is an antenna of the mobile station 120.

Therefore, the frequency conversion repeater according to another embodiment of the present invention compensates the insertion loss caused by the splitter during the uplink of the radio signal transmitted from the mobile station to the base station via the corresponding repeater by the antenna extension device including the low noise amplifier in the low noise amplifier. do. For example, a two-divider can compensate for noise losses of about 3dB or more with a low noise amplifier (10dB to 13dB gain), and a 5V via a low-noise amplifier (gain gain 10dB-15dB) for a three-divider. The noise loss can be compensated for.

5A and 5B are diagrams illustrating examples of an antenna extension apparatus of an optical repeater according to another embodiment of the present invention.

FIG. 5A illustrates an example of an antenna expansion device of an optical repeater according to another embodiment of the present invention, in which an antenna expansion device 332 is installed at an input port of a final terminal of a slave 330 of an optical repeater 300. The antenna extension device 332 is connected to the mobile station 120 and a plurality of antennas 3346a, 334b, and 334c arranged in at least two directions for transmitting / receiving a radio signal RF.

The antenna extension device 332 of the present invention is composed of at least two or more dividers (for example, two dividers or three dividers) and low noise amplifies a radio signal (RF) transmitted from the mobile station 120 and provides the divider with low noise. An amplifier (not shown).

The optical repeater 300 according to another embodiment of the present invention configured as described above receives and amplifies a radio signal (RF) transmitted from the base station 100 at the downlink by the master 310 and slaves through the optical fiber 320. A plurality of antennas 334a arranged in at least two directions by amplifying a radio signal RF transmitted from the slave 330 and amplifying it into at least two radio signals through the antenna extension device 332. , 334b, 334c are sent to the mobile station 120.

In the uplink, the radio signal RF transmitted from the mobile station 120 is received through a plurality of antennas 334a, 334b, and 334c arranged in at least two directions, and received through the antenna extension device 332. ) Is amplified by low noise and transferred to the slave 330. Amplifies the radio signal RF received from the slave 330 to a predetermined level and transmits it to the master 310 through the optical fiber 320 and amplifies the radio signal RF transmitted from the master 310 to the base station ( 100).

FIG. 5B illustrates another example of an antenna expansion apparatus of an optical repeater according to another embodiment of the present invention, and an antenna different from a terminal input port for receiving diversity of a slave 330 of the optical repeater 300 of FIG. 5A. An expansion device 338 is installed, and a plurality of antennas 339a, 339b, and 339c for reception diversity arranged in at least two directions are connected to the antenna expansion device 338.

The antenna extension device 338 for receive diversity of this embodiment also includes a divider (e.g., two or three dividers) (not shown) and amplifies low noise a radio signal (RF) transmitted from the mobile station 120. And a low noise amplifier (not shown) provided to the distributor.

Another example of the optical repeater 300 of another embodiment of the present invention configured as described above is a plurality of antennas 339a for reception diversity in which radio signals RF transmitted from the mobile station 120 are arranged in at least two directions during uplink. 339b and 339c receive a low noise amplified radio signal RF received through the other antenna extension device 338 and transmits it to the slave 330. Amplifies the radio signal RF received from the slave 330 to a predetermined level and transmits it to the master 310 through the optical fiber 320 and amplifies the radio signal RF transmitted from the master 310 to the base station ( 100).

Therefore, the optical repeater according to another embodiment of the present invention is the insertion loss caused by the splitter during the uplink of the radio signal (RF) transmitted from the mobile station to the base station via the corresponding optical repeater by the antenna extension device including a low noise amplifier Compensates in the low noise amplifier. For example, a divider can compensate for noise losses of about 3dB or more with a low noise amplifier (gain is 10dB to 13dB), while a divider can gain approximately 5B with a gain of a low noise amplifier (gain is 10dB to 15dB). The noise loss can be compensated for.

6 is a diagram illustrating an example of an antenna expansion apparatus according to the present invention. Referring to this, the antenna extension apparatus of the present invention applied to FIGS. 3A, 4A, and 5A includes an input / output port 1140 of a mobile communication repeater, Splitter 1141, first signal splitters 1143a, 1143b, 1143c, low noise amplifiers 1145a, 1145b, 1145c, second signal splitters 1147a, 1147b, 1147c, and multiple antenna connections Ports 1149a, 1149b, 1149c.

In the antenna extension device of the present invention configured as described above, the wireless signal transmitted from the base station during the downlink is transmitted through the input / output port 1140 of the mobile communication repeater and is divided into three paths through the splitter 1141 and each of the first signal separators. The signals are transmitted to the plurality of antenna connection ports 1149a, 1149b, and 1149c through the 1431a, 1143b, and 1143c and the second signal splitters 1147a, 1147b, and 1147c.

The wireless signal sent by the mobile station in the uplink is transmitted through a plurality of antenna connection ports 1149a, 1149b, and 1149c and passes the low noise amplifiers 1145a, 1145b, and 1145c through the second signal splitters 1147a, 1147b, and 1147c. Low noise amplification is transmitted to the first signal separators 1143a, 1143b, and 1143c, the splitter 1141, and the input / output port 1140 of the mobile communication repeater, and transmitted to the base station.

FIG. 7 is a diagram illustrating another example of an antenna extension apparatus according to the present invention. Referring to this example, another example of the antenna extension apparatus of the present invention applied to FIGS. 3B, 4B, and 5B is a transmission port 1180 of a mobile communication repeater. ), Divider 1181, low noise amplifiers 1183a, 1183b, 1183c, filters 1185a, 1185b, 1185c, and a plurality of antenna connection ports 1187a, 1187b, 1187c. The filters 1185a, 1185b, and 1185c may be configured as band pass filters (BPFs).

In the antenna expansion device for reception diversity of the present invention configured as described above, a radio signal transmitted from a mobile station in an uplink is transmitted through a plurality of antenna connection ports 1187a, 1187b, and 1187c, and filters 1185a, 1185b, and 1185c are used. Filtered through the low noise amplifiers 1183a, 1183b, and 1183c, and amplified by the low noise amplifier, and transmitted to the splitter 1181 and the transmission port 1180 of the mobile communication repeater.

As described above, the present invention can compensate for the increase in the noise figure generated in the splitter used for antenna extension in the mobile communication repeater for telecommunications, thereby improving the reverse reception coverage from the mobile station to the base station by 3 dB or more.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (8)

In a mobile communication repeater for transmitting a radio signal between a base station and a mobile station through a plurality of antennas arranged in at least two directions, A splitter for branching a plurality of radio signals of the base station to a plurality of antennas and transmitting the radio signals received through the antennas to the base station, and low noise amplifying the radio signals received from the plurality of antennas And an antenna extension device comprising a low noise amplifier for transmitting to a distributor. The antenna expansion apparatus of claim 1, wherein the low noise amplifier has a gain of 10 dB to 13 dB. The antenna expansion apparatus of claim 1, wherein the low noise amplifier has a gain of 10 dB to 15 dB. The antenna extension apparatus of claim 1, wherein the mobile communication repeater is an RF repeater, a frequency conversion repeater, or an optical repeater. The antenna expansion device of claim 1, wherein the antenna extension device is installed inside or outside the mobile communication repeater. The antenna extension device of claim 1, further comprising an input / output port of the mobile communication repeater, a splitter, first signal splitters, low noise amplifiers, second signal splitters, and a plurality of antenna connection ports. Antenna expansion device of a mobile communication repeater, characterized in that. The method of claim 1, wherein the mobile communication repeater, Another divider for transmitting the radio signals received from the plurality of antennas for receive diversity to the base station, and a low noise amplifier for low noise amplifying and transmitting the radio signals received from the plurality of antennas for receive diversity to the other divider; And an antenna extension device for a mobile communication repeater. 8. The apparatus of claim 7, wherein the other antenna extension device further comprises a transmission port, a divider, low noise amplifiers, band pass filters, and a plurality of antenna connection ports for the receive diversity of the mobile communication repeater. An antenna expansion device of a mobile communication repeater characterized in.

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