KR200346327Y1 - Radio frequency repeater having structure of embedded two-way antenna - Google Patents

Abstract

The present invention relates to a wireless repeater having a built-in bidirectional antenna structure, and by installing a donor antenna and a service antenna integrally to the wireless repeater, there is no need for a connection cable between the antenna and the wireless repeater to minimize the installation space for installing the wireless repeater have.

In addition, by detecting the strength of the base station transmission signal transmitted from the base station through the donor antenna in real time and provided through the LCD (Liquid Crystal Device display), the user installs a wireless repeater based on the strength of the base station transmission signal provided from the LCD display In this way, the installation and operation of the wireless repeater can be simplified.

In addition, by installing a frequency band selector switch that can select a frequency band in the wireless repeater to freely select the frequency band corresponding to the terminal used by the user occurs in the wireless repeater according to the prior art that provides a comprehensive service over the entire band The near-par problem can be solved.

Description

RADIO FREQUENCY REPEATER HAVING STRUCTURE OF EMBEDDED TWO-WAY ANTENNA}

The present invention relates to a wireless repeater having a bidirectional antenna built-in structure, and more particularly, to a wireless repeater having a bidirectional antenna built-in structure that can be easy to maintain and install operation to obtain a cost-effective effect during maintenance and installation.

In general, in a wireless telecommunication network of a mobile telecommunication system, there is a shielded space or a small blocked shadow area where transmission and reception of a terminal is not possible due to regional constraints. Such shaded areas may include all regions having a geographical structure with a weak radio wave due to natural and artificial obstacles such as mountains, basements of buildings, tunnels, and interiors of buildings.

It is a device that enables mobile phone and wireless call reception in dead zones by extracting weak signals to be relayed from the signals existing in the shielded areas or shadowed areas, amplifying them with low noise, and then radiating them through an antenna. Radio frequency repeaters are commonly used. The wireless repeater re-amplifies the base station signal to cover a shielded space or a shadow area existing within the service range of the base station to perform a function of relaying a high quality service anytime and anywhere.

In the wireless repeater, a donor antenna for transmitting and receiving wireless signals with a base station and a service antenna for transmitting and receiving wireless signals with a terminal are connected. The down-link signal from the base station to the terminal is received by the donor antenna, amplified by the wireless repeater, and then transmitted to the terminal through the service antenna, and the up-link signal from the terminal to the base station is The service antenna is received and amplified in the wireless repeater and then transmitted to the base station via the donor antenna.

However, in the wireless relay system including the wireless repeater according to the prior art, the donor antenna and the service antenna have a structure installed separately from the wireless repeater, so that a cable is added to connect the wireless repeater and each antenna. When the wireless repeater is installed, it is necessary to properly adjust the position of the wireless repeater and the position of the antenna, so that there is a problem that a lot of difficulties in installation unless the expert.

Accordingly, the present invention has been made to solve the above problems, to provide a wireless repeater having a built-in two-way antenna built-in structure that makes it easy to maintain and install the operation to obtain a cost reduction during maintenance and installation operation. There is a purpose.

1A is a front view of a wireless repeater having a bidirectional antenna built-in structure according to a preferred embodiment of the present invention.

FIG. 1B is a side view of the wireless repeater having the bidirectional antenna embedded structure shown in FIG. 1A.

FIG. 1C is a rear view of the wireless repeater having the bidirectional antenna embedded structure shown in FIG. 1A.

2 is a detailed block diagram of a forward link module unit and a reverse link module unit to which an IF (Intermediate Frequency) type of a wireless repeater according to a preferred embodiment of the present invention is applied.

3 is a detailed block diagram of a forward link module unit and a reverse link module unit to which a radio frequency (RF) type of a wireless repeater according to an exemplary embodiment of the present invention is applied.

4 is a detailed block diagram illustrating an operation characteristic of a wireless repeater according to a preferred embodiment of the present invention.

FIG. 5 is a diagram illustrating a change in gain according to a mobile facing azimuth pattern.

6 is a diagram illustrating a change in gain according to a base station facing azimuth pattern.

<Explanation of symbols for main parts of drawing>

10: LCD display 20: key / switch

30: service antenna 40: reverse link module

42a to 42g: Amplifiers 43a to 43c: BPF (Band Pass Filter)

44: page shifters 45a and 45b: mixer section

46: LPF (Low Pass Filter) 47: SAW Filter (Surface Acoustic Wave filter)

48: ATT (ATTenuator) 49a and 49b: local oscillator

50: shield 60: forward link module

62a to 62g: amplification unit 63a to 63c: BPF

64: page shifters 65a and 65b: mixer section

66: LPF 67: SAW Filter

68: ATT 70: donor antenna

80: battery backup unit 90: power supply unit

92 control unit 94a and 94b, 96a and 96b detection unit

According to one aspect of a preferred embodiment of the present invention, in a wireless repeater for amplifying a wireless signal received from a base station and relaying to a terminal, the wireless repeater, a service antenna for transmitting and receiving the first wireless signal with the terminal on one side A donor antenna is installed on the other side so as to face a direction opposite to the installation direction of the service antenna, and a donor antenna is configured to transmit and receive the second radio signal with the base station, and the service antenna is shielded from the donor antenna. A wireless repeater having a bidirectional antenna built-in structure provided with a shield between an antenna and the donor antenna is provided.

In addition, a display unit for displaying in real time the strength of the second radio signal transmitted from the base station and received by the donor antenna in one side of the wireless repeater in the direction in which the service antenna is embedded.

The display unit further displays an operating power state, a battery charge capacity state, and an operation state that are applied to the wireless repeater.

In addition, a frequency band selection switch is further installed on one side of the wireless repeater so that a user can select a frequency band.

The donor antenna may amplify the second radio signal received from the base station to the donor antenna and output the amplified second radio signal to the service antenna, or amplify the first radio signal received from the terminal to the service antenna. In order to output the signal, the donor antenna and the service antenna are each embedded with an IF type or an RF type relay unit.

The module unit may include a page shifter to cancel a signal fed back from the donor antenna to the service antenna or fed back from the service antenna to the donor antenna.

In addition, the donor antenna is designed to have a narrow beam width and a high gain compared to the service antenna.

The donor antenna is also designed as a microstrip patch array antenna, and the service antenna is installed as a microstrip patch antenna.

In addition, the donor antenna is separated from the wireless repeater and installed to enable flow.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in a variety of different forms, only this embodiment is to make the disclosure of the present invention is complete and the scope of the invention to those skilled in the art It is provided for complete information.

1A is a front view illustrating a wireless repeater having a bidirectional antenna embedded structure according to a preferred embodiment of the present invention, FIG. 1B is a side view, and FIG. 1C is a rear view.

1A to 1C, a wireless repeater 100 having a built-in bidirectional antenna structure according to a preferred embodiment of the present invention receives a radio signal from a terminal (refer to '200' of FIG. 4) and has a reverse link module unit ( The service antenna 30 for transmitting to the reverse link module 40 and the donor antenna 70 for receiving a signal from the base station (see 300 in FIG. 4) and transmitting the signal to the forward link module 60. Is installed on the front and rear parts with the shield 50, respectively. Here, the reverse link module 40 amplifies and filters the radio signal transmitted from the service antenna 30, converts it into a signal that the base station 300 can receive, and transmits it to the donor antenna 70, and forwards it. The link module unit 60 amplifies and filters the radio signal transmitted from the donor antenna 70, converts the radio signal into a signal that the terminal 200 can receive, and transmits the signal to the service antenna 30.

The service antenna 30 is installed at the lower end of the front part of the wireless repeater 100, and is preferably designed in a microstrip patch antenna structure so that the antenna beam is radiated to the front. The micro strip patch antenna is smaller in size than other antennas, has a high transmit / receive isolation (i.e., such that a plurality of adjacent antennas do not interfere with each other), and has a simple structure on the surface of the wireless repeater 100. It is easy to mount and it is possible to adjust a front-back ratio by providing a reflecting plate in the back. In addition, since the service antenna 30 needs to transmit a radio signal to a relatively large area unlike the donor antenna 70, a wider beam width is required than the donor antenna 70.

The donor antenna 70 is installed in the opposite direction to the service antenna 30, that is, is installed on the rear of the wireless repeater 100, an antenna for receiving a radio signal of the base station to transmit a radio signal to the forward link module unit 60 Front to back ratio (i.e., the strength of radio waves radiated forward and backward), sidelobe level, gain, and 3 dB bandwidth (Figure 5). 6 is preferably designed as a microstrip patch array antenna structure. As described above, the reason why the donor antenna 70 is designed as a patch array antenna is that the gain can be increased and the beam width can be narrowed. In addition, since the donor antenna 70 receives a radio signal from a base station fixedly installed in one place compared to the terminal 200, a narrower beam width and higher gain are required than the service antenna 30, and similar radiation characteristics, gains, and front and rear ratio characteristics are obtained. It can be applied to other antennas of.

Meanwhile, the donor antenna 70 is preferably installed in the wireless repeater 100, but may be detachably installed from the wireless repeater 100 in order to cover the shadow area in which the radio wave environment is very poor. In this case, the donor antenna 70 is installed to be detachably attached to the wireless repeater 100, and the donor antenna 70 is separated from the wireless repeater 100 in a flexible manner according to the radio wave environment, thereby moving to an area where radio wave reception is easy. Let's do it. For example, to operate fluidly from the wireless repeater 100, such as a power cable of the vacuum cleaner.

The reverse link module unit 40 amplifies the terminal 200 signal transmitted from the service antenna 30, removes the unwanted signal, converts the signal into a signal that the base station 300 can receive, and transmits the signal to the donor antenna 70. It performs the function. Meanwhile, the forward link module unit 60 amplifies the signal of the base station 300 transmitted from the donor antenna 70, removes unwanted signals, and converts the signal to a signal that the terminal 200 can receive. Perform the function of sending to.

The reverse link module unit 40 and the forward link module unit 60 automatically gain the gain of the wireless repeater 100 when the wireless repeater 100 causes oscillation due to lack of isolation between the antennas 30 and 70. It has ALC (Automatic Level Control) and AGC (Automatic Gain Control) functions so that the wireless repeater 100 can operate normally. In addition, it may be configured as an Intermediate Frequency (IF) type or a Radio Frequency (RF) type.

First, as shown in FIG. 2, the IF type reverse link module 40 is an amplifier connected between a duplexer 461a and 461b connected to the service antenna 30 or the donor antenna 70, respectively. (42a to 42g), BPF (Band Pass Filter; 43a to 43c), page shifter (44), mixer (45a, 45b), LPF (Low Pass Filter) 46, SAW filter (Surface Acoustic) Wave filter 47), ATT (ATTenuator) 48, and local oscillator 49a, 49b. The IF type forward link module unit 60 includes amplification units 62a to 62g, BPFs 63a to 63c, page shifters 64, mixer units 65a and 65b, connected between the duplexers 461a and 461b. LPF 66, SAW filter 67, ATT 68 and local oscillators 69a, 69b.

The duplexer 461a is connected to the service antenna 30 to receive a signal from the terminal 200 transmitted from the service antenna 30 or the base station transmitted from the donor antenna 70 via the forward link module unit 60 ( 300) to transmit a signal to the service antenna (30). On the contrary, the duplexer 461b is connected to the donor antenna 70 to receive the base station 300 signal transmitted from the donor antenna 70, or transmits the signal from the service antenna 30 via the reverse link module unit 40. The terminal 200 transmits a signal to the donor antenna 70.

The amplifiers 42a to 42g and 62a to 62g respectively amplify and output the input signal according to the set gain value. In detail, the amplifier 42a amplifies the signal transmitted from the service antenna 30. The amplifier 42b amplifies the signal from which unnecessary signals are removed through the BPF 43a to a desired size. The amplifier 42c is down-converted by the mixer 45a and amplifies the intermediate frequency to which the unnecessary signal is removed through the LPF 46 to a desired size. The amplifier 42d amplifies the intermediate frequency from which unnecessary signals are removed through the SAW filter 47 to a desired size. The amplifier 42e is up-converted by the mixer 45b and amplifies the high frequency signal from which unnecessary signals are removed through the BPF 43b to a desired size. The amplifier 42f amplifies the signal output through the ATT 48 to a desired size. The amplifier 42g amplifies the signal output from the BPF 43c to a desired size and outputs it.

Similarly, the amplifier 62a amplifies the signal transmitted from the donor antenna 70. The amplifier 62b amplifies the signal from which unnecessary signals are removed through the BPF 63a to a desired size. The amplifier 62c is down-converted by the mixer 65a, and amplifies the intermediate frequency to which the unnecessary signal is removed through the LPF 66 to a desired size. The amplifier 62d amplifies the intermediate frequency to which the unnecessary signal is removed through the SAW filter 67 to a desired size. The amplifier 62e is up-converted by the mixer 65b and amplifies the high frequency signal from which unnecessary signals are removed through the BPF 63b to a desired size. The amplifier 62f amplifies the signal output through the ATT 68 to a desired size. The amplifier 62g amplifies and outputs the signal output from the BPF 63c to a desired size.

The BPFs 43a to 43c and 63a to 63c are bandpass filters and perform a function of outputting only signals of a predetermined frequency band. For example, the BPF 43a passes only the frequency band transmitted from the terminal 200 and removes the rest of the frequency. For example, pass a signal from 1750 MHz to 1780 MHz and remove the remaining frequencies. The BPF 63a passes signals of 1840 MHz to 1870 MHz and removes the remaining frequencies. The BPFs 43b and 43c pass only the high frequency signal up-converted by the mixer unit 45b, and remove other local oscillation frequency and image signal. The BPFs 63b and 63c pass only the high frequency signal up-converted by the mixer section 65b, and remove other local oscillation frequency and image components.

For reference, the frequency band used by the domestic personal communication service (PCS) uses different frequency bands for each service company. In the case of L company, the base station transmission frequency (mobile station reception) is 1860MHz to 1870MHz, and the base station reception frequency (mobile station transmission) is used. ) Is 1770 MHz to 1780 MHz. In case of the K company, the base station transmission frequency (mobile station reception) is 1840 MHz to 1860 MHz, and the base station reception frequency (mobile station transmission) is 1750 MHz to 1770 MHz.

The page shifters 44 and 64 are signals fed back from the service antenna 30 (or donor antenna) to the donor antenna 70 (or service antenna) and input to the antennas 30 and 70. The phase difference of the signal is adjusted to be 180 degrees, thereby canceling the feedback signal by 5 dB to about 10 dB. As such, the reason why the page shifters 44 and 64 are installed is that the wireless repeater 100 oscillates when the signal transmitted from one antenna is fed back to the other antenna and is not normally operated. This is to prevent. By configuring the page shifters 44 and 64 in this manner, it is possible to install a wireless repeater in an area where installation of the page shifters 44 and 64 is insufficient and thus difficult to install.

The mixer section 45a mixes the local oscillation frequency transmitted from the local oscillator 49a and the signal transmitted from the page shifter 44 to generate an intermediate frequency. That is, the high frequency is down converted to the intermediate frequency. For example, a high frequency of 1750 MHz to 1780 MHz is down converted to an intermediate frequency. In contrast, the mixer section 45b up-converts the intermediate frequency to a high frequency by using the local oscillation frequency transmitted from the local oscillator 49b. For example, the intermediate frequency is up converted to a high frequency of 1750 MHz to 1780 MHz. On the other hand, the mixer unit 65a mixes the local oscillation frequency transmitted from the local oscillator 69a and the signal transmitted from the page shifter 64 and down converts it to an intermediate frequency. For example, a high frequency of 1840 MHz to 1870 MHz is down converted to an intermediate frequency. In contrast, the mixer section 65b up-converts the intermediate frequency back to a high frequency through the local oscillation frequency transmitted from the local oscillator 69b. For example, the intermediate frequency is up converted to a high frequency of 1840 MHz to 1870 MHz.

The LPF 46 passes only the intermediate frequency down-converted by the mixer section 45a, and removes other local oscillation frequencies, harmonics, image components, and the like. The LPF 66 passes only the intermediate frequency down-converted by the mixer unit 65a, and performs a function of removing other local oscillation frequencies, harmonics, image components, and the like.

The SAW filter 47 filters the signal converted to the intermediate frequency to remove fine noise that the LPF 46 has not filtered. In this case, only a frequency to be serviced is selected and passed from a signal of the 30 MHz band, and a signal of another company is removed. For example, when the L company wants to select the L company and the K company frequency band, it functions to pass only the 10MHz band that is the L service band. The SAW filter 67 filters the signal converted to the intermediate frequency to remove fine noise that the LPF 66 has not filtered.

The ATT 48 attenuates a signal transmitted from the amplifier 42e to a predetermined size. That is, the magnitude of the signal output to the amplifier 42e is attenuated so that the signal output through the amplifier 42g connected to the last end is output to the desired size. On the other hand, the ATT 68 attenuates the signal transmitted from the amplifier 62e to a predetermined size.

Meanwhile, as shown in FIG. 3, the RF type reverse link module unit 40 is an amplifier 42a connected between the duplexers 461a and 461b connected to the service antenna 30 or the donor antenna 70, respectively. To 42d), BPFs 43a and 43b, page shifter 44, and ATT 48. The RF type forward link module unit 60 includes amplifiers 62a to 62d, BPFs 63a and 63b, page shifter 64, and ATT 68 connected between duplexers 461a and 461b.

Unlike the IF type shown in FIG. 2, the RF type shown in FIG. 3 is a device required for down-converting the high frequency RF to the intermediate frequency IF and up-converting the intermediate frequency IF to the high frequency RF. Ie mixer sections 45a, 45b, 65a, 65b, LPFs 46, 66, amplifiers 42c, 42d, 62c, 62d, SAW filters 47, 67 and local oscillators 49a, 49b, 69a. 69b) is not required, and the other components are the same as the IF type. Accordingly, for the convenience of description, the description of the components of the same RF type as the IF type will be replaced with the above description.

Meanwhile, as shown in FIGS. 1A and 1B, an LCD display (Liquid Crystal Device display) 10 and a key / switch are provided on a front portion of the wireless repeater 100 having a built-in bidirectional antenna structure according to a preferred embodiment of the present invention. A key (key and switch) 20 is further installed, and a battery backup unit 80 and a power supply unit 90 are installed at the rear side or the lower side.

The LCD display unit 10 includes the signal intensity Rx received from the base station 300 to the donor antenna 70 of the wireless repeater 100 and the signal transmitted from the service antenna 30 of the wireless repeater 100 to the terminal. The strength (Tx), the state of charge of the battery of the wireless repeater 100, whether the external power is used, and whether the normal operation state of the wireless repeater 100 is displayed. In addition, various types of information are displayed on the LCD display unit 10 by manipulation of a menu button of a key / switch unit 20.

The LCD display unit 10 is controlled by the control unit 92 of the wireless repeater 100, as shown in FIG. The control unit 92 provides the LCD display unit 10 with a signal corresponding to a change in the intensity (Rx, Tx) of the transmitted / received signal detected by the detectors 94a, 94b, 96a, and 96b, respectively, in real time. The state of the 80 and the power supply unit 90 is detected and provided to the LCD display unit 10. Thus, the LCD display unit 10 displays the strengths (Rx, Tx) of the transmission and reception signals, the state of the battery backup unit 80 and the power supply unit 90 in real time to provide the user.

The key / switch unit 20 is a power on / off switch (PWR) for controlling the overall operation of the wireless repeater 100, a reset button (Reset) for initializing when an abnormal operation of the wireless repeater 100 occurs, It includes a menu button (Menu) for adjusting the overall operating state of the wireless repeater 100, and a switch for selecting a service frequency band (hereinafter referred to as a frequency band selection switch).

The frequency band selection switch is a means for providing a user to select a desired frequency band, by selecting a frequency band corresponding to the terminal 200 used by the user to generate near-frequency generated in the repeater covering all frequency bands. Near-far problem (i.e., the strength of the signal of the frequency band of the user's terminal is less than that of the frequency band of the other company. The phenomenon of not amplifying the signal in the frequency band properly). Such near-wave framing is a phenomenon that can occur frequently because PCS and L base stations are not installed in the same place.

For example, a user uses a terminal in the L company frequency band, the user's home corresponds to a shaded area, and a wireless repeater is installed in the house to simultaneously service the L and K company frequency bands. Suppose you receive more strongly. At this time, even if the wireless repeater is installed in place so that the signal of the L company frequency band can be strongly received, the wireless repeater receives the signal of the K company frequency band as well as the signal of the L company frequency band. As a result, saturation may occur in the wireless repeater due to the received signal of the K company frequency band, thereby preventing normal operation. Therefore, the wireless repeater 100 according to the preferred embodiment of the present invention allows the user to freely select a frequency band serviced by each communication company. That is, only a frequency band serviced by any one carrier may be arbitrarily selected and used.

Meanwhile, as shown in FIG. 4, the control unit 92 is controlled through the operation of the key / switch unit 20. The control unit 92 may include the LCD display unit 10 as well as the reverse link module unit 40 and the like. The overall operation of the wireless repeater 100 including the forward link module unit 60 is controlled.

Hereinafter, the operation characteristics of the wireless repeater 100 having a built-in bidirectional antenna structure according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIG. 4, first, the high frequency signal RF transmitted from the base station 300 is transmitted to the forward link module unit 60 through the donor antenna 70 and the duplexer 461b. The signal transmitted to the forward link module unit 60 is amplified and filtered through the amplifier 62a, the BPF 63a and the amplifier 62b, and then transmitted to the mixer 65a via the page shifter 64. do.

On the other hand, the control unit 92 detects the frequency band and the intensity of the transmission signal of the base station 300 output from the duplexer 461b through the detection unit 96b in real time and provides it to the LCD display unit 10. The user is provided with the frequency band and the intensity of the transmission signal from the LCD display unit 10, it is possible to appropriately select the installation position of the wireless repeater 100 based on this.

If the frequency band of the transmission signal output from the duplexer 461b is not the frequency band of the terminal carrier used by the user, the frequency band selection switch (S / W) of the key / switch unit 20 is operated to operate the frequency band. Can be selected. In this case, the controller 92 transmits only the corresponding frequency band to the terminal 200 through the forward link module unit 60 according to the command signal transmitted from the frequency band selection switch S / W of the key / switch unit 20. To be sent. That is, the controller 92 controls the local oscillator 69a to select a frequency band to be serviced according to the frequency band selection switch S / W, and the frequency band is selected by the SAW filter 67.

The signal transmitted to the mixer section 65a is mixed with the oscillation frequency transmitted from the local oscillator 69a and down-converted to an intermediate frequency. The LPF 66, the amplifier 62c, the SAW filter 67, and the amplifier ( After amplification and filtering through 62d), it is transmitted to the mixer section 65b. The signal transmitted to the mixer section 65b is mixed with the oscillation frequency transmitted from the local oscillator 69b, up-converted into a high frequency signal, filtered and amplified by the BPF 63b and the amplifier 62e, and then ATT ( 68).

The signal transmitted to the ATT 68 is attenuated to a certain size by the ATT 98 according to the command of the controller 92, and amplified and filtered through the amplifier 62f, the BPF 63c, and the amplifier 62g. Then sent to the duplexer 461a. At this time, the control unit 92 detects the signal output from the amplifying unit 62g in real time through the detection unit 96a, and if the value is greater than the set value, controls the ATT 68 to bring a large amount of attenuation. Adjust the magnitude of the output signal by making the attenuation amount small.

The signal output to the duplexer 461a is transmitted to the service antenna 30 after passing through the duplexer 461a, and the service antenna 30 transmits the signal transmitted from the duplexer 461a to the terminal 200.

Similarly, the received signal of the high frequency base station 300 transmitted from the terminal 200 is received by the service antenna 30, and the duplexer 461a, the amplifier 42a, the BPF 43a, the amplifier 42b, and the page. Shifter 44, mixer 45a, LPF 46, amplifier 42c, SAW filter 47, amplifier 42d, mixer 45b, BPF 43b, amplifier 42e After passing through the ATT 48, the amplifier 42f, the BPF 43c, the amplifier 42g, and the duplexer 461b, it is transmitted to the base station 300 through the donor antenna 70.

Although the technical spirit of the present invention described above has been described in detail in a preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, the present invention will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to a preferred embodiment of the present invention, by installing the donor antenna and the service antenna integrally in the wireless repeater, the installation space for installing the wireless repeater can be minimized because no connection cable between the antenna and the wireless repeater is required. .

In addition, according to a preferred embodiment of the present invention, by detecting the strength of the base station transmission signal transmitted from the base station through the donor antenna in real time through the LCD display unit by the user based on the strength of the base station transmission signal provided from the LCD display unit By installing a repeater, the installation of the wireless repeater has become easier.

In addition, according to a preferred embodiment of the present invention, by providing a frequency band selection switch for selecting a frequency band in the wireless repeater to freely select the frequency band corresponding to the user's terminal to provide a comprehensive service over the entire band The near-par problem that occurs in the wireless repeater can be solved.

In addition, according to a preferred embodiment of the present invention, it is possible to sell directly to the user by providing a wireless repeater that is easy to install, thereby minimizing the burden of installation maintenance costs in the service company.

Claims (9)

In the wireless repeater to amplify the radio signal received from the base station to relay to the terminal, The wireless repeater, A service antenna is built in one side to transmit and receive the first radio signal with the terminal, and a donor antenna in order to transmit and receive the second radio signal with the base station on the other side to face in a direction opposite to the installation direction of the service antenna. And a built-in bidirectional antenna embedded structure in which a shield is provided between the service antenna and the donor antenna to shield the service antenna and the donor antenna. The method of claim 1, The wireless repeater having a bidirectional antenna built-in structure further installed on one side of the wireless repeater in the direction in which the service antenna is embedded, the display unit for displaying in real time the strength of the second wireless signal received from the base station to the donor antenna . The method of claim 2, The display repeater is a wireless repeater having a bi-directional antenna built-in structure further displays the operating power state, the battery charge capacity state and the operation state applied to the wireless repeater. The method of claim 1, One side of the wireless repeater is a wireless repeater having a built-in bi-directional antenna structure is further provided with a frequency band selection switch so that the user can select a frequency band. The method of claim 1, The wireless repeater amplifies and outputs the second radio signal received from the base station to the donor antenna to the service antenna, or amplifies the first radio signal received from the terminal to the service antenna and outputs it to the donor antenna. Wireless repeater having a built-in bi-directional antenna structure between the donor antenna and the service antenna to each of the IF type or RF type of relay module. The method of claim 5, wherein And the module unit has a bidirectional antenna embedded structure in which a page shifter is configured to cancel a signal fed back from the donor antenna to the service antenna or fed back from the service antenna to the donor antenna. The method of claim 1, And a donor antenna having a bidirectional antenna embedded structure designed to have a narrower beam width and higher gain than the service antenna. The method of claim 1, And the donor antenna is designed as a micro strip patch array antenna, and the service antenna is installed as a micro strip patch antenna. The method of claim 1, The donor antenna is a wireless repeater having a bi-directional antenna built-in structure is installed so that the flow is separated from the wireless repeater.