KR100807820B1 - The non electrical machinery and appliances communication system which utilizes 1 cycle 2 line antenna system - Google Patents

Abstract

A radio transceiver communication system using a 1 cycle 2 line antenna mode is provided to improve stability of the system by performing transmission and reception after respectively separating transmitters and receivers of a main repeater and a line repeater antenna. A main repeater(100) where a transmitter and a receiver are installed in one case(500) in order to receive a radio transceiver signal is configured in the ground. Transmitting and receiving line repeaters(200) having an antenna(400') so as to transceive the ground radio transceiver signal and underground radio transceiver signal are configured under ground. To separately perform transmission and reception by using one frequency to the ground or the underground, transmitting and receiving cables(300) are respectively connected to main transmitting and receiving units of the main repeater and the transmitting and receiving line repeaters.

Description

The non electrical machinery and appliances communication system which utilizes 1 cycle 2 line antenna system

1 is a block diagram showing the configuration of a radio communication system using a one-frequency two-line antenna method according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of an incoming main repeater of FIG. 1. FIG.

FIG. 3 is a block diagram illustrating a configuration of an out main repeater for controlling a frequency output to the ground of FIG. 1.

4 is a block diagram showing a line repeater configuration for controlling transmission in the basement of FIG.

5 is a block diagram showing a line repeater configuration for controlling reception in the basement of FIG.

* Description of the symbols for the main parts of the drawings *

100: main repeater 111: first band pass filter

112: first amplifier 113: first automatic gain control unit

114: second amplifier 115: first attenuator

116: third amplifier 117: second band pass filter

118: first modem 119: first low pass filter

120: combination part 121: 1st A / D

122: first OP-amp 123: second OP-amp

124: first control unit 200: line repeater

211: third band pass filter 212: second attenuator

213: fourth amplifier 214: second automatic gain control unit

215: fifth amplifier 216: fourth band pass filter

217: DIVE 218: fifth band pass filter

219: sixth amplifier 220: second modem

221: second control unit 222: second low pass filter

223: 2A / D 224: 3OP-amplifier

225: fourth op-amp 226: first choke coil

227: second choke coil 300: cable

400: antenna 500: case

The present invention relates to a radio communication system using a one-frequency two-line antenna method, and more particularly, to configure a main repeater, a line repeater, and an antenna installed on the ground and underground sections. The repeater and line repeater antennas are separated from the transmitting side and the receiving side so that transmission and reception can be performed to improve the stability of the system. ) It is equipped with modem so that communication between main repeater and line repeater can be done smoothly, and user can monitor the condition of line repeater installed underground in one place. It relates to a radio communication system.

In general, a walkie talkie is determined by the output of the radio on the ground, but in the call between the ground and the underground zone, the call distance is shortened because of the shaded area of the underground zone.

For example, currently, a leaky coaxial cable is installed in the underground section, and a radio connection terminal box is installed on the ground, and many methods are used to talk with the underground section. However, the problem with this method is that the leakage coaxial cable has a large loss and a long section. There is a disadvantage that the shadow area is enlarged and the call is impossible.

In the state that the transmission and reception are not completely separated, the system gains little and the gain is low, so the quantity of facilities to be built underground increases, and the system is unstable, causing frequent A / S problems. There is a problem that is not fundamentally solved.

In order to solve the above problems, a method for solving the problems is proposed in the published Patent No. 1996-0039 (hereinafter referred to as "priority draft").

In the prior art, a line amplifier provides a communication path in both directions to input a transmission / reception signal from a first line and a second line, and then separate transmission and reception so that long-distance transmission is possible. A first low pass filter for removing noise by passing through the bay; A first bidirectional coupler for connecting a low pass received signal to a receive path, and connecting a low pass received signal to the first low pass filter to separate transmission and reception; A first band pass filter for inputting the output of the first bidirectional coupler to pass only a predetermined frequency band; A reception amplifier for amplifying the bandpassed reception signal; A second bandpass filter for bandpassing the output of the receiving amplifier; A second bidirectional coupler for connecting the second band-passed received signal to the second line side and separating the transmission and reception by connecting the transmitted signal input through the second line to the transmission path; A second low pass filter for passing only a predetermined frequency or less to remove noise included in the transmission / reception signal; A third band pass filter for passing only a transmission signal band; A transmission amplifier for amplifying the bandpassed transmission signal; And a fourth band pass filter for passing only the amplified transmission signal band and a power supply for stabilizing the DC voltage input through the line to supply the amplifier.

In the conventional scheme configured as described above, since the transmission and reception is performed through one line, there is a problem that the gain is small when transmitting through the underground line repeater.

In addition, since many connection points are installed in underground cables, standing waves ratio (VSWR) is unstable and oscillation occurs, thereby causing a problem of spurious.

If the gain is small, the efficiency is lowered compared to the installation cost of the system installed underground, there is a problem that the economy is inferior.

In addition, a repeater is used to transmit and receive using a single cable, and transmits (RX signal) through an amplifier and an antenna installed underground. The signal applied from the basement through the antenna is applied to the ground repeater through the amplifier (TX signal).

However, when the RX signal and the TX signal are applied as described above, the transmission and reception cannot be completely separated, which causes the signal to hover in the line, which causes noise to interfere with the flow of the signal. .

In addition, since the methods used by existing companies amplify using one line, there is a problem in that the amplification and output are limited at a predetermined level or more.

When using a conventional leaky coaxial cable or a 1-line antenna method, there is a problem that radio wave shadow areas frequently occur.

In addition, the conventional methods have a problem of receiving a lot of communication constraints because the gain is small because the transmission and reception are performed using one line and the communication distance is short even around the ground building.

In order to solve the above problems, the present invention separates the main repeater and the line repeater antenna from the transmitting side and the receiving side so that transmission and reception can be separately transmitted and received between the ground and the underground sections. To reduce the number of antennas and line repeaters in underground structures, and to communicate with the main repeater (transmit and receive side) and the repeater (transmit and receive side) by mounting an RF wireless modem. It aims to provide a radio communication system using a 1-frequency 2-line antenna system that can monitor the state of the line repeater installed in the system and facilitate user's use.

In addition, it is to provide a radio communication system using a one-frequency two-line antenna system to easily cope with an emergency situation or each situation by allowing the radio frequency to be transmitted and received respectively, so that communication is performed in both directions in real time. There is this.

In addition, since the transmission and reception is performed through two lines through one frequency, the radio frequency using the one-frequency two-line antenna system is stabilized by stabilizing the standing wave ratio to prevent oscillation and spurious. The purpose is to provide a communication system.

When the radio signal is applied to the receiving antenna installed on the ground, the transmitter of the main repeater filters, amplifies the weak signal and then amplifies and filters the large signal again through the AGC, which allows the output to be transmitted underground. It is sent to the Combiner to send both the radio signal and the DC voltage and RF radio modem signal for the line repeater to operate in the underground coaxial cable, and the signal applied to the underground coaxial cable is applied to the line repeater installed in each section. After amplifying, filtering, and transmitting a signal to an underground user through an antenna, the repeater control unit connects the output state of the line repeater to the RF repeater of the main repeater through the RF modem to check the operation of the line repeater. To provide a radio communication system using a one-frequency two-line antenna system for monitoring Never.

In order to achieve the above object, the present invention provides a radio communication system in which a radio located in the ground and a radio located in the base station communicate with each other. It is composed of the ground, the line repeater with an antenna to transmit and receive the radio signal of the ground and the radio signal located in the basement is configured in the basement, the transmitting side so that the transmission and reception is made separately using one frequency to the ground or underground In another aspect, the present invention provides a radio communication system using a 1-frequency 2-line antenna method, wherein a receiving side cable is connected to a main repeater and a line repeater, respectively.

Hereinafter, the configuration of a radio communication system using a one-frequency two-line antenna method according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a radio communication system using a one-frequency two-line antenna method according to the present invention, Figure 2 is a block diagram showing the configuration of the incoming main repeater of Figure 1, Figure 3 is Figure 1 Figure 4 is a block diagram showing the configuration of the main repeater for controlling the output frequency to the ground, Figure 4 is a block diagram showing the configuration of a line repeater to control the transmission in the basement of Figure 1, Figure 5 is received in the basement of Figure 1 Is a block diagram showing the configuration of a line repeater for controlling a.

As shown in FIGS. 1 to 5, the present invention includes a main repeater 100, a case 500, a line repeater 200, a cable 300, and an antenna 400, and a line repeater 200. ) And the antenna 400 ′ are installed in each of the basement layers, as shown in FIG. 1.

The main repeater 100 is composed of a main transmitter 110 receiving a radio from the base by applying a frequency to the inside of the case 500, and a main receiver 110 'receiving a radio from the base to the ground. do.

The main transmitter 110 and the main receiver 110 'are respectively configured, but the main transmitter 110 and the main receiver 110' are formed in the same configuration. Therefore, in the present specification, since the description of the configuration of the main receiver 110 ′ overlaps with the description of the configuration of the main transmitter 100, the description of the configuration of the main receiver 110 ′ is omitted.

The main repeater 100 receives a signal applied through an antenna 400 located above the ground and filters only a specific frequency band, and a signal applied through the first band pass filter 111. A first amplifier 112 for amplifying the first amplifier, a first automatic gain control unit 113 for maintaining a signal at an appropriate signal level so as to obtain a desired gain from the signal applied through the first amplifier 112, and a first Through the second amplifier 114 for amplifying the signal applied from the automatic gain control unit 113, the first attenuator 115 to improve the performance of the second amplifier 114, and through the first attenuator 115 A third amplifier 116 for re-amplifying the applied signal, a second band pass filter 117 for filtering only a specific band from a signal applied through the third amplifier 116, and a first communication with an underground facility First low pass for removing unnecessary components in addition to the output components in the modem 118 and the first modem 118 Synthesizes the signal output through the filter unit 119, the second band pass filter 117 and the modem signal applied from the first low pass filter unit 119, and synthesizes the DC voltage to supply the underground line , RF + DC combiner unit 120 for applying the synthesized three signals to the underground coaxial cable, the first A / D unit 121 to make the signal to a DC voltage of a constant size, and the first A / D unit 121 The first OP-amp 122 and the second OP-amp 123 to maintain a constant signal applied to the (), and the first control unit 124 to control the modem and monitor the overall performance of the system.

The cable 300 is installed in the basement so as to transmit a signal applied from the main repeater 100 to the basement.

The cable 300 is provided with a line repeater 200 for applying a signal applied from the main repeater 100 to the radio.

The line repeater 200 applies a signal, an RF modem signal, and a DC voltage from the main repeater 100 on the ground to filter only the required frequency band, and the third band pass filter unit 211 and the impedance of the frequency signal. The fixed second attenuator 212 and the matching, the second amplifier 212 and the fourth amplifier 213 for compensating for signal loss in the line and the amplitude of the input signal of the fourth amplifier 213 is detected to detect the output signal AGC 214 that automatically adjusts the gain so that its amplitude is always kept constant, a fifth amplifier 215 that amplifies the signal applied by AGC 214 to the next signal interval, and a fifth amplifier 215 4 band pass filter 216 for filtering only the required frequency band using a signal applied from the DC, DC voltage, and the signal filtered by the fourth band pass filter 216 is replaced with a voice circuit in the microwave channel to the radio signal Authorized DIA (DIV) 217, a fifth band pass filter 218 for filtering only a specific band from the signal applied by the diabe 217, and an amplifying signal applied by the fifth band pass filter 218. The six main amplifier 219, the antenna 400 'for applying the signal applied through the sixth amplifier 219 to the radio located in the basement, and the ASK modulation method consisting of the main repeater 100 of the ground in a half-duplex method Second control unit for controlling the transmission and reception of the main repeater 100 on the ground in a half-duplex manner of the second modem 220 and the second modem 220 to communicate with, and monitor and control the overall performance of the system ( 221, a second low pass filter 222 passing a low frequency in a signal applied from the second modem 220, and a high frequency cut, and a fourth amplifier 213. Amplified signal being constant In the second A / D unit 223 for generating a DC voltage of magnitude, the third OP-amp 224 for maintaining the signal applied from the second A / D unit 223 at a constant level, and in the AGC unit 214 The fourth OP-amp 225 which applies a DC voltage to maintain the signal at a constant level and applies a predetermined level signal to the AGC unit 214, and synthesizes the amplified radio signal and the RF modem signal by coaxial cable with the DC voltage. The first choke coil 226 and the second choke coil 227 are sent to the main repeater 100.

As described above, the line repeater is also divided into a transmitter side and a receiver side, and the transmitter and receiver line repeaters 200 and 200 ′ are configured in the same manner as shown in FIGS. 3 and 5.

Therefore, since the configuration of the transmission line repeater 200 and the configuration of the reception line repeater 200 'are identical, the description thereof will be omitted.

According to the present invention configured as described above, when the radio signal is applied to the cable 300 installed in the basement of the signal from the transmitting side main repeater 100 on the ground, the applied radio signal is the transmission side line installed on the cable 300 The signal is applied to the radio located in the basement through the repeater 200 and the antenna 400.

The signal applied to the radio located in the basement is applied to the receiving line repeater 200 'through the antenna 400 installed underground, and the signal applied to the receiving line repeater 200' passes through the cable 300. The radio signal is applied to the main receiver 110 ′ of the main repeater 100 installed on the ground.

The signal applied to the main receiver 110 ′ of the main repeater 100 applies a signal to the radio located on the ground through the antenna 400.

Referring to the operation of the radio signal transmitted and received through the above process with reference to the accompanying drawings, the radio signal through the radio located on the ground via the antenna located on the ground main transmitter 110 of the main repeater 100 To apply.

When a radio signal is applied to the main transmitter 110 of the main repeater 100 through the antenna 400, the first band pass filter 111 passes only a desired band and cancels other bands. After amplifying in one amplifier 112, the automatic gain control unit 113 maintains the signal at an appropriate level.

A third amplifier 116 is installed between the second amplifier 114 and the third amplifier 116 to improve the performance of the amplifier so that a smooth walkie talkie can be made to a walkie talkie user underground. Amplify to a large signal through.

The unwanted wave generated by the signal amplified by the third amplifier 116 is removed through the second band pass filter 117 connected to the output terminal.

Finally, the output signal is detected, and the first A / D unit 121 generates a DC voltage with a predetermined size in preparation for the input signal.

The first A / D unit 121 applies a DC voltage toward the automatic gain control unit 113 that maintains the radio signal constantly, that is, the first OP amplifier 122.

At this time, the DC voltage decreases when the radio signal applied from the antenna 400 is large, and the DC voltage increases when the radio signal is small to maintain the radio signal at a constant level.

Since the first modem 118 is configured with the ASK modulation method, the transmission is controlled by the first controller 124 in a half duplex manner.

By requesting the data of the current state to the line repeater 200 installed in the basement, the data is received and displayed on the LCD, so that the user can check it.

In addition, the amplified radio signal and the RF modem signal is synthesized in the RF + DC combiner unit 120, and synthesized again to supply a DC voltage to the cable 300 in the basement, the synthesized three signals underground cable 300 Is applied.

Radio and RF modem signals and DC voltages are applied from the main transmitter 110 of the main repeater 100 through the cable 300 installed underground to pass only the desired band, and the other bands are transmitted from the third band pass filter 211. Erase.

The signal lost through the third band pass filter 211 is amplified by the fourth amplifier 213 and then maintained by the second automatic gain control unit 214 at an appropriate level.

In addition, the fixed second attenuator 212 and impedance matching, and transmits to the next section through the fifth amplifier 215 to send a signal to the next section.

The basement user amplifies the sixth amplifier 219 so that the user can make a radio call smoothly, and through the fourth band pass filter 216 connected to the output terminal again to remove the unwanted wave generated by the amplified signal. To filter.

Finally, the second automatic gain control unit detects the output signal and changes it in the second A / D unit 223 to a predetermined size in preparation for the input signal, and generates the DC voltage and maintains the radio signal in a constant manner. 214, that is, toward the third OP-amp 224 and the fourth OP-amp 225.

The DC voltage is decreased when the radio signal applied from the antenna 400 'is large and the DC voltage is increased when the signal is small to maintain the signal at a constant level.

The second RF modem 220 is configured by the ASK modulation method, and the transmission / reception is controlled by the second controller 221 in a half-duplex method.

The main repeater 100 installed on the ground sends data of the current state to the LCD, and the sent data is displayed on the LCD so that the user can check it.

The second low pass filter 222 and the second modem 220 to remove unnecessary components in addition to the output components of the second modem 220, and through the second control unit 221 to monitor the overall performance of the system underground The user may output through the fifth band pass filter 218, the sixth amplifier 219, and the antenna 400 ′ so that the user can transmit only the radio signal.

The amplified radio signal and the RF second modem 220 signal are loaded on the coaxial cable 300 together with the DC voltages synthesized in the first and second choke coils 226 and 227, and the main receiver 110 of the main repeater 100 is connected. ') Is applied.

As described above, the process of applying the signal from the base radio to the ground radio is performed in the same way as the process of applying the signal from the ground radio to the radio in the basement.

As described above, the present invention amplifies the signal on the receiving side and the transmitting side through the two-line method, which limits the amplification and output limits amplified by the one-line method used by a conventional company, thereby solving the amplification limit accordingly. It works.

In addition, it is possible to reduce the quantity of the antenna and the line repeater to make the radio communication by connecting the ground and underground, there is an effect that the facility cost is less than the conventional.

In addition, since the standing wave ratio (VSWR) is stabilized, the system is also stable, so that the radio communication is seamlessly performed.

In addition, since the modem is installed inside, there is an effect of improving the performance of the system and allowing the operator to conveniently check the state of the system on the ground with respect to the construction installed underground.

In addition, it is possible to talk freely around buildings, regardless of the distance of call, so that firefighters or other emergency personnel can call in an emergency.

In addition, since the system is stable, unwanted waves are not generated due to the oscillation phenomenon, so that communication can be performed without violating the radio wave method, and there is an effect that the expansion is easy even if a large number of groups use radios.

In addition, there are fewer places where shadowed areas occur, so there is an effect that the radio talks efficiently.

In addition, since the AGC circuit is built in and emits a constant signal output, after-sales service is reduced, resulting in a cost reduction.

Claims (5)

In the radio communication system in which the radio on the ground and the radio in the basement communication, In order to transmit and receive the radio signal, the main repeater 100 having a transmitting side and a receiving side built in one case 500 is configured on the ground, Transmission and reception line repeaters (200, 200 ') having an antenna are configured underground to transmit and receive radio signals on the ground and radio signals located underground. The transmission and reception cable 300 is a main transmission and reception unit 110 and 110 'of the main repeater 100 and a transmission and reception line repeater so that transmission and reception are performed separately using one frequency into the ground or underground. 200, 200 '), the radio communication system using a one-frequency two-line antenna method, characterized in that connected to each. The method of claim 1, The main transmitter 110 of the main repeater 100 is a first band pass filter 111 for receiving a signal applied through an antenna and filtering only a specific frequency band, A first amplifier 112 for amplifying a signal applied through the first band pass filter 111, A first automatic gain control unit 113 for maintaining a radio signal at an appropriate level so as to obtain a desired gain from the signal applied through the first amplifier 112; A second amplifier 114 for amplifying a signal applied from the first automatic gain control unit 113, The first attenuator 115 to improve the performance of the second amplifier 114, A third amplifier 116 for amplifying a signal applied through the first attenuator 115, A second band pass filter 117 filtering only a specific band from a signal applied through the third amplifier 116, A first modem 118 communicating with a radio located in the basement, A first low pass filter unit 119 for removing unnecessary components in addition to the output components in the first modem 118; The signal output through the second band pass filter 117 and the signal of the first modem 118 applied from the first low pass filter 119 are synthesized, and synthesized to supply a DC voltage underground. RF + DC combiner unit 120 for applying three signals to the underground cable 300, A first A / D part 121 for outputting the output signal to a DC voltage having a predetermined magnitude; A first OP-amplifier 122, a second OP-amplifier 123, which keeps a signal applied from the first A / D unit 121 constant, Radio control system using a one-frequency two-line antenna method characterized in that it comprises a first control unit (124) for controlling the first modem (118), and monitor the overall performance of the system. The method of claim 1, The transmission line repeater 200 may include a third band pass filter unit 211 for applying only a signal, a DC first modem 118 signal, and a DC voltage from the main repeater 100 on the ground to filter only a required band; A fixed second attenuator 212 matching the signal impedance; A fourth amplifier 213 for compensating for losses in the track through the second attenuator 212, A second automatic gain control unit 214 for detecting a change in the amplitude of the input signal of the fourth amplifier 213 and automatically adjusting the gain so that the amplitude of the output signal is always kept constant; A fifth amplifier 215 for transmitting a signal applied from the second automatic gain control unit 214 to the next signal section; A fourth band pass filter 216 for filtering only a frequency band required by a signal applied by the fifth amplifier 215 and a DC voltage; A DIV 217 for applying a radio signal by replacing the signal filtered by the fourth band pass filter 216 with a voice circuit in a microwave channel, A fifth band pass filter 218 for filtering only a specific frequency band of the signal applied from the dive unit 217, A sixth amplifier 219 for amplifying the signal filtered by the fifth band pass filter 218 and applying a signal through the antenna 400 '; A second modem 220 configured with an ASK modulation scheme and communicating with the main repeater 100 on the ground in a half-duplex scheme; A second control unit 221 for controlling a signal transmitted or received from the main repeater 100 on the ground in a half-duplex manner of the second modem 220 and monitoring and controlling the overall performance of the system; A second low pass filter 222 for passing a low frequency and cutting a high frequency in a signal applied from the second modem 220, A first choke coil 226 applied to the main repeater 100 by being loaded on the cable 300 together with the DC voltage synthesized from the radio signal applied through the DY 217 and the RF second modem 220 signal; A second A / D unit 223 for making the amplified signal applied by the fifth amplifier 215 into a DC voltage having a predetermined magnitude; A third OP amplifier 224 configured to maintain a constant level of the signal applied from the second A / D unit 223, A fourth OP-amplifier 225 for applying a DC voltage to maintain the signal at a constant level in the second automatic gain adjusting unit 214, and applying a signal having a predetermined level to the second automatic gain adjusting unit 214; 1 frequency, characterized in that composed of a second choke coil 227 synthesized by the amplified radio signal and the RF second modem 220 signal is carried on the coaxial cable 300 along with the DC voltage to the main repeater 100 Radio communication system using 2 line antenna method. The method of claim 2, The main repeater 100 is composed of a main transmitter 110 and a main receiver 110 ', and the main transmitter 110 and the main receiver 110' are configured in the same manner as the one-frequency two-line antenna method. Radio communication system using. The method of claim 3, The line repeater includes a transmission line repeater 200 and a reception line repeater 200 ', and the transmission line repeater 200 and the reception line repeater 200' are configured in the same manner. Radio communication system using.

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