KR101010814B1 - Integrated Radio Repeater - Google Patents

Abstract

The present invention relates to an integrated wireless relay device, comprising: a first duplexer for separating a signal received by a first and a second antenna, a first antenna into a forward first and a second signal, and filtering a high frequency signal by receiving a forward first signal The first and second high frequency filtering unit, the first band pass filtering unit for receiving the forward second signal through the first switching unit to filter the band pass signal, and outputs from the second high frequency filtering unit and the first band pass filtering unit A forward relay module for removing noise from the received signal and selecting and amplifying only a necessary signal, bypassing the forward first signal output from the forward relay module, and transmitting the forward second signal output from the forward relay module to the second switching unit A third circulator for filtering a forward first signal bypassed from the first circulator A forwarding first signal output from the filtering unit, the third high frequency filtering unit, and a forward second signal input through the first switching unit are output through the second antenna, and the signals received by the second antenna are reversed first and second. A second duplexer for separating into a signal, a first and a second low frequency filtering unit for receiving and filtering a reverse first signal, and a second for receiving and filtering a reverse second signal separated in the second duplexer through a second switching unit A reverse relay module for removing noise from signals output from the bandpass filtering unit, the second low frequency filtering unit, and the second bandpass filtering unit, and selecting and amplifying only the necessary signals; Second circulator and reverse relay module for transmission to the switching unit and output through the first duplexer and the first antenna And a third low frequency filtering unit for receiving the reverse first signal from the second circulator and transmitting the first reverse signal through the first duplexer and the first antenna, thereby miniaturizing the integrated repeater and reducing interference between the components. Can be removed.

Integrated Relay Unit, WCDMA, WiBro, Circulator

Description

Integrated Radio Repeater

1 is an exemplary diagram of a general integrated wireless relay device;

2 is a structural diagram of an integrated wireless relay device according to the present invention.

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

210, 212: antenna 220, 222: duplexer

230, 232, 234: high frequency filtering unit 240, 242, 244: low frequency filtering unit

250: forward relay module 252: forward low noise amplifier

254 forward passband filter 256 forward power amplifier

260, 262: circulator 270. 272: switching unit

280, 282: bandpass filtering unit 290: reverse relay module

292 reverse low noise amplifier 294 reverse passband filter

296 reverse power amplifier

The present invention relates to a wireless relay device, and more particularly, to a wireless relay device incorporating a wireless relay device used for improving call quality in a mobile communication system using different communication methods.

In general, mobile communication systems aim to provide quality services to subscribers regardless of location. To this end, wireless relay devices are installed in areas with poor mobile communication service quality. The wireless relay device is an extension of the base station's wireless transmission / reception portion. It is a device that can provide a very effective mobile communication service at low cost in the radio shadow area such as the building and the basement. It is used.

The wireless relay device amplifies the forward signal transmitted from the mobile communication system side and relays it to the mobile communication terminal side, and amplifies the reverse signal transmitted from the mobile communication terminal side and relays the reverse signal to the mobile communication system side.

The wireless relay device is configured to relay each frequency band according to the communication method of the mobile communication system, and thus has a structure that cannot accept signals of other communication methods. However, the mobile communication network is not limited to the CDMA method, and it is expected that the mobile communication network using the WiBro method, the WCDMA method, etc. will coexist in the future, and implement a repeater for each mobile communication system using each communication method. If installed, there are problems such as an increase in network construction costs.

Therefore, recently, an integrated wireless relay apparatus for transmitting and receiving wireless signals for a mobile communication system using different communication methods has been developed, and the configuration thereof is shown in FIG. 1.

FIG. 1 is an exemplary diagram of a general integrated wireless relay device. For example, FIG. 1 illustrates a wireless relay device that integrates signals for a WCDMA system and a WiBro system.

Referring to the configuration of the integrated wireless relay device shown in FIG. First, in order to relay a forward WCDMA signal, the integrated wireless relay device separates a signal received through the first antenna 102 and the first antenna 102 according to each frequency band from the mobile communication system. Noise is removed from the signal output from the first high frequency filter 106 and the first high frequency filter 106 that receive and filter the WCDMA signal among the signals separated by the first duplexer 104 and the first duplexer 104. A first forward passband filter 110, a first forward passband filter 110 for filtering a signal corresponding to a frequency of use from an output signal of the first forward low noise amplifier 108 The first forward power amplifier 112 for amplifying the signal output from the 110, the second high frequency filter 114 for filtering the output signal of the first forward power amplifier 112, the input signal A second duplexer 116 for checking and outputting a WCDMA signal or a WiBro signal, and a second antenna 118 for transmitting an output signal of the second duplexer 116 to a mobile communication terminal.

Next, in order to relay the forward WiBro signal, the integrated wireless relay device includes a switching unit (130, 138). Since the WiBro method is a time division method, the switching units 130 and 138 connect to the forward side or the reverse side when the WiBro signal is received so that the WiBro signal is amplified and output. That is, when the WiBro signal is received as a result of separating the signal from the first duplexer 104, the switching unit 130 is connected to the forward side so that the WiBro signal is transmitted to the second forward low noise amplifier 132 so that the noise from the received signal is reduced. To be removed. The second forward passband filter 134 filters the signal corresponding to the frequency of use from the output signal of the second forward low noise amplifier 132, and the second forward power amplifier 136 receives the second forward passband filter 134. Amplify the output signal. In addition, the amplified signal is transmitted to the second duplexer 116 through the switching unit 138, and then transmitted to the mobile communication terminal side through the second antenna 118.

The reverse WCDMA signal is received through the second antenna 118 and then separated from the second duplexer 116, and the first low frequency filtering unit 120, the first reverse low noise amplifier 122, and the first reverse passband filter ( 124, the first reverse power amplifier 126, the second low frequency filter filter 128, and the first duplexer 104 are transmitted to the WCDMA mobile communication system through the first antenna 102.

In addition, the reverse WiBro signal is received through the second antenna 118 and then separated from the second duplexer 116, the second switching unit 138, the second reverse low noise amplifier 140, and the second reverse passband filter. 142, the second reverse power amplifier 144, the first switching unit 138, and the first duplexer 104 are transmitted to the WiBro mobile communication system through the first antenna 102.

As such, the WCDMA and WIBW wireless relay system is characterized by a low noise amplifier, a passband filter and a power to avoid the interference between the WCDMA system using the frequency division scheme and the WiBro system using the time division scheme and the interference between the active elements. Since the amplifiers are implemented independently, the relay device cannot be miniaturized and the manufacturing cost increases. In addition, since the relay device cannot be miniaturized, it is difficult to install the relay device.

The present invention has been made to solve the above problems and disadvantages, there is a technical problem to be able to miniaturize the integrated wireless relay device for a mobile communication system using a different communication method.

In addition, the present invention has a technical problem to provide an integrated wireless relay device that can eliminate the interference between the elements while miniaturizing the integrated wireless relay device.

Integrated wireless relay device of the present invention for achieving the above technical problem is a first and second antenna for transmitting and receiving a signal wirelessly; A first duplexer for separating the signal received by the first antenna into forward first and second signals according to a frequency band; A first high frequency filtering unit and a second high frequency filtering unit which receives the forward first signal separated from the first duplexer and filters the high frequency signal; A first bandpass filtering unit for receiving the forward second signal separated from the first duplexer through a first switching unit controlled by the first duplexer and filtering the band pass signal; A forward relay module for removing noise from each signal output from the second high frequency filtering unit and the first band pass filtering unit, and selecting and amplifying only a necessary signal; A first circulator for bypassing a forward first signal output from the forward relay module and transmitting a forward second signal output from the forward relay module to a second switching unit; A third high frequency filter for filtering the forward first signal bypassed from the first circulator; A forward first signal output from the third high frequency filtering unit and a forward second signal input through the first switching unit are output through the second antenna, and the signal received by the second antenna is reversed according to a frequency band. A second duplexer separating the first and second signals; A first low frequency filtering unit and a second low frequency filtering unit for receiving and filtering the reverse first signal separated by the second duplexer; A second bandpass filtering unit configured to receive and filter a reverse second signal separated by the second duplexer through a second switching unit controlled by the second duplexer; A reverse relay module for removing noise from each signal output from the second low frequency filtering unit and the second band pass filtering unit, and selecting and amplifying only a required signal; A second circulator for transmitting a reverse second signal output from the reverse relay module to the first switching unit and outputting the reverse second signal through the first duplexer and the first antenna; And a third low frequency filtering unit configured to receive a reverse first signal from the reverse relay module through the second circulator and transmit the reverse first signal through the first duplexer and the first antenna.

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

2 is a configuration diagram of an integrated wireless relay apparatus according to the present invention, for example, integrating signals for a mobile communication system (WCDMA system) using a frequency division method and a mobile communication system (WiBro system) using a time division method. Represents a wireless relay device capable of relaying.

As shown, the wireless repeater according to the present invention includes a first antenna 210, a first duplexer 220, a first high frequency / third low frequency filtering unit 230, 244, a first switching unit 270, Second high frequency / first bandpass filtering unit 232 and 280, forward relay module 250, first circulator 260, third high frequency / first low frequency filtering unit 234 and 240, 2 duplexer 222, second antenna 212, second switching unit 272, second bandpass / second low frequency filtering unit 282, 242, reverse relay module 290 and second circulator 262 )

Here, the forward relay module 250 includes a forward low noise amplifier 252, a forward passband filter 254, and a forward power amplifier 256, and the reverse relay module 290 includes a reverse low noise amplifier 292 and a reverse direction. Passband filter 294 and reverse power amplifier 296.

Referring to the operation of the integrated wireless relay device shown in Figure 2 according to the type of the received signal as follows.

First, it is confirmed that the forward WCDMA signal is a WCDMA signal from the first duplexer 220 after being received by the first antenna 210. Accordingly, only the high frequency signal is separated and then the first WCDMA signal is separated. 2 is transmitted to the forward relay module 250 through the high frequency filtering unit 232. The forward relay module 250 removes the noise from the received signal and amplifies only the necessary signal. First, the forward relay module 250 removes the noise from the forward low noise amplifier 252 and only the signal corresponding to the frequency used by the forward passband filter 254. After filtering, it is amplified to the desired size in the forward power amplifier (256). Thereafter, the signal output from the forward relay module 250 is bypassed and filtered through the first circulator 260 to the third high frequency filtering unit 234, and then the second duplexer 222 and the second antenna 212. Through the air.

On the other hand, the reverse WCDMA signal is received by the second antenna 212, the second duplexer 222 is confirmed as a WCDMA signal, and is transmitted to the first low-frequency filtering unit 240. Since the first low frequency filtering unit 240 is a reverse WCDMA signal, the first low frequency filtering unit 240 filters only the low frequency signal from the input signal and transmits the low frequency signal to the second low frequency filtering unit 242. Thereafter, the output signal of the second low frequency filtering unit 242 is bypassed by the second circulator 262 through the reverse relay module 290 and transmitted to the third low frequency filtering unit 244, and the third low frequency filtering unit The signal filtered at 244 is transmitted to the WCDMA mobile communication system through the first duplexer 220 and the first antenna 210. Here, the reverse relay module 290 removes noise from the input signal and filters and amplifies only necessary signals.

Next, the forward WiBro signal is received by the first antenna 210 and then confirmed by the second duplexer 220 is a WiBro signal. Accordingly, the first switching unit 270 is connected to the first bandpass filtering unit 280 so that the forward WiBro signal is transferred to the first bandpass filtering unit 280 and separated into a bandpass signal, and then forward relay module 250. Is sent).

The forward relay module 250 removes noise from the received signal and amplifies only the necessary signal. First, the noise is removed from the forward low noise amplifier 252 and the signal corresponding to the frequency used by the forward passband filter 254. After filtration, amplify to the desired size in forward power amplifier 256. Thereafter, the signal output from the forward relay module 250 is radiated to the air through the first circulator 260, the second switching unit 272, the second duplexer 222, and the second antenna 212.

On the other hand, after the reverse WiBro signal is received by the second antenna 212, the second duplexer 222 is confirmed as a WiBro signal. Accordingly, the second switching unit 272 is connected to the second bandpass filtering unit 282 to transmit a signal, and the signal filtered by the second bandpass filtering unit 282 is input to the reverse relay module 290. . In the reverse relay module 290, the noise is removed and only the signal amplified is amplified by the second circulator 262, the first switching unit 270, the first duplexer 220 and the first antenna 210. Transmitted to the mobile communication system.

Here, the first and second circulators 260 and 262 are multi-terminal elements that output a signal input to any one port only to a predetermined port, and are used to fix the flow of current in one direction. As such, by introducing the circulators 260 and 262, each element for relaying the WCDMA signal is always in perfect impedance matching. That is, when the switching unit 270, 272 for relaying the WiBro signal is in an ON state with the band pass filtering unit 280, 282, the impedance may change, but the circulators 260, 262 may not do so. Since the WCDMA signal can be transmitted irrespective of the impedance, the impedance is always matched, thereby eliminating the influence of the interference between the devices.

The integrated wireless relay device according to the present invention described above can implement a low noise amplifier, a passband filter, and a power amplifier in common, thereby miniaturizing the size of the wireless relay device. And, of course, the integrated wireless relay device can be used only for the WCDMA system, only for the WiBro system, or for both the WCDMA / WiBro system, depending on the purpose of use.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

According to the present invention, in the integrated configuration of a wireless relay device for a mobile communication system using a different communication method, there is an advantage that the size of the relay device can be miniaturized and the installation thereof can be facilitated. In addition, it is possible to reduce the unit cost of the wireless repeater by minimizing components such as amplifiers and filters.

In addition, since a signal is transmitted to two mobile communication systems using a circulator, there is an effect of eliminating interference between devices due to impedance variation.

Claims (5)

First and second antennas for transmitting and receiving signals wirelessly; A first duplexer for separating the signal received by the first antenna into forward first and second signals according to a frequency band; A first high frequency filtering unit and a second high frequency filtering unit which receives the forward first signal separated from the first duplexer and filters the high frequency signal; A first bandpass filtering unit for receiving the forward second signal separated from the first duplexer through a first switching unit controlled by the first duplexer and filtering the band pass signal; A forward relay module for removing noise from each signal output from the second high frequency filtering unit and the first band pass filtering unit, and selecting and amplifying only a necessary signal; A first circulator for bypassing a forward first signal output from the forward relay module and transmitting a forward second signal output from the forward relay module to a second switching unit; A third high frequency filter for filtering the forward first signal bypassed from the first circulator; A forward first signal output from the third high frequency filtering unit and a forward second signal input through the first switching unit are output through the second antenna, and the signal received by the second antenna is reversed according to a frequency band. A second duplexer separating the first and second signals; A first low frequency filtering unit and a second low frequency filtering unit for receiving and filtering the reverse first signal separated by the second duplexer; A second bandpass filtering unit configured to receive and filter a reverse second signal separated by the second duplexer through a second switching unit controlled by the second duplexer; A reverse relay module for removing noise from each signal output from the second low frequency filtering unit and the second band pass filtering unit, and selecting and amplifying only a necessary signal; A second circulator for transmitting a reverse second signal output from the reverse relay module to the first switching unit and outputting the reverse second signal through the first duplexer and the first antenna; And A third low frequency filtering unit configured to receive a reverse first signal from the reverse relay module through the second circulator and transmit the reverse first signal through the first duplexer and the first antenna; Integrated wireless relay device, characterized in that comprising a. The method of claim 1, The forward relay module includes a forward low noise amplifier for removing noise from an input signal; A forward passband filter for filtering out a required signal from the forward low noise amplifier; And A forward power amplifier for amplifying the signal output from the forward passband filter; Integrated wireless relay device, characterized in that comprising a. The method of claim 1, The reverse relay module includes a reverse low noise amplifier for removing noise from an input signal; A reverse passband filter for filtering out a required signal from the reverse low noise amplifier; And A reverse power amplifier for amplifying the signal output from the reverse passband filter; Integrated wireless relay device, characterized in that comprising a. The method of claim 1, And wherein the first signal is a WCDMA signal and the second signal is a WiBro signal. The method of claim 1, The first circulator outputs the forward first signal only to the third high frequency filtering unit as a forward first signal is input, and forwards the forward second signal only to the second switching unit as a forward second signal is input. Output, The second circulator outputs the reverse first signal only to the third low frequency filtering unit as the reverse first signal is input, and transmits the reverse second signal to the first switching unit as the reverse second signal is input. Integrated wireless relay device, characterized in that only output.

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