KR101711001B1 - Portable radio telecommunication system for firefighting - Google Patents
Portable radio telecommunication system for firefighting Download PDFInfo
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- KR101711001B1 KR101711001B1 KR1020150132777A KR20150132777A KR101711001B1 KR 101711001 B1 KR101711001 B1 KR 101711001B1 KR 1020150132777 A KR1020150132777 A KR 1020150132777A KR 20150132777 A KR20150132777 A KR 20150132777A KR 101711001 B1 KR101711001 B1 KR 101711001B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/64—Distributing or queueing
- H04Q3/645—Circuit arrangements therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/28—Current-supply circuits or arrangements for selection equipment at exchanges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/32—Circuit arrangements for second or subsequent stages of hunting switching
Abstract
Description
The present invention relates to a radio communication system for fire fighting, and more particularly, to a radiotelephone communication system for fire fighting, and more particularly, to a radiotelephone communication system for fire fighting, The present invention relates to a radio communication system for a fire extinguishing system capable of transmitting an FM broadcast signal.
The building is equipped with various fire fighting equipment in preparation for the fire. Among the fire fighting equipment installed for firefighting, since radio waves can not be transmitted from the ground to the underground, it is necessary to install a radio system for commanding each other in case of fire.
Generally speaking, the distance of the radio can be determined by the output of the radio itself in the ground, but in the communication between the ground and the underground, the communication distance is shortened due to the shaded area formed in the underground section, Especially, in case of fire, if there is no radio communication between underground and ground, various problems can occur because it is impossible to make a command between ground and underground.
In the prior art, the patent application No. 0778297 relates to a wireless communication system, which includes a communication cable installed between a tunnel and an inside or outside of a building, a ground and an underground space or a tunnel, During communication relaying signal
And a plurality of antennas for receiving a signal from the communication relay device through the communication cable and for transmitting or receiving a radio signal, wherein the communication cable is provided with a communication communication cable and a transmission communication cable, Is provided with a plurality of receiving internal antennas connected to a plurality of receiving communication cables and a plurality of transmitting internal antennas connected to a plurality of transmitting communication cables, And a communication cable for transmitting to an internal wireless device is separately provided, so that the dredging cost and the maintenance cost can be reduced. In addition, The present invention relates to a wireless communication system capable of always checking presence or absence of a wireless communication system.
In addition, Patent No. 0807820 relates to a radio system using a one-frequency two-line antenna system, in which a main repeater in which a transmitter and a receiver are built in a single case is constructed on the ground so that radio signals can be transmitted and received, A line repeater having an antenna for transmitting / receiving a radio signal and a radio signal located underground is constructed in the basement and a transmission / reception cable is connected to a main repeater And the number of line repeaters can be reduced. Therefore, the facility cost for establishing the radio communication by connecting the ground and the underground is reduced, and the standing wave ratio (VSWR) Stabilizes the system by stabilizing it, and since it has a modem inside it, the performance of the system And operators can check the status of the system conveniently on the ground for underground installations and can freely talk around the building regardless of the distance depending on the distance of the call so that firefighters or other emergency agents can call Effective technology.
In addition, Japanese Patent No. 1379507 relates to a wireless remote command system using a cable for microwave transmission and reception. In the wireless remote command system, a relay transmitter and a relay receiver are installed on the ground, and a cable for transmitting and receiving microwaves, A technology related to a fire-suppression wireless command system using an ultra-high frequency transmission / reception cable that enables a wireless telephone to be smoothly moved between a ground radio and a walkie-talkie by moving an up-line amplifier and a transmitting / .
An object of the present invention is to provide a technology for a radio communication system for a fire extinguishing system capable of transmitting and receiving between ground and underground by using one line and capable of transmitting an FM broadcasting signal.
In order to achieve the above object, the present invention provides a radio communication system for a radio communication between a ground radio and an underground radio, comprising: a transmitting antenna and a receiving antenna; A control panel connected to the fire main transmission / reception amplifier, and a first transmission / reception duplexer connected to the fire main transmission / reception amplifier. The main transmission / Radio system; An FM radio system constituted by an FM main amplifier and an FM control panel connected to the FM main amplifier and installed in an underground emergency room; An outdoor antenna installed outside the building to transmit an FM signal to the FM main amplifier; A U / V frequency separator for transmitting a UHF signal to the fire protection radio system, receiving a UHF signal from the fire protection radio system, and receiving a VHF signal from the FM radio system; A main distributor connected to the U / V frequency separator and installed on the ground or on the ground to transmit signals to or receive signals from each layer of the building; A plurality of line amplifiers connected to the main distributor; And a termination power amplifier installed at an end of the line amplifier.
In the present invention, the fire main transmission / reception amplifier includes: a first reception antenna for receiving a first RF signal of the transceiver; A second receiving antenna for receiving a second RF signal of the transceiver; A first attenuator connected to the first reception antenna and having a damping ratio of 10 dB for receiving a first RF signal and attenuating a first RF signal; A second attenuator connected to the second reception antenna and having a damping ratio of 20 dB for receiving a second RF signal to attenuate a second RF signal; A first SAW filter coupled to the first attenuator to receive the attenuated first RF signal and to filter the attenuated first RF signal into a constant-band signal; A second SAW filter coupled to the second attenuator to receive the attenuated second RF signal and to filter the attenuated second RF signal into a predetermined band signal; A first distributor for combining signals filtered by the first SAW filter and the second SAW filter; A first amplifier for amplifying the RF signal synthesized by the first divider; A third SAW filter for filtering the RF signal amplified by the first amplifier to a predetermined band; A second amplifier for amplifying a signal filtered by the third SAW filter; And a second distributor for distributing a signal amplified by the second amplifier to a CPU and a transmission / reception separator and transmitting the signal. A fourth SAW filter for filtering the RF signal applied from the transmitting / receiving separator to a predetermined band; A third amplifier for amplifying the filtered RF signal from the fourth SAW filter; A fifth SAW filter for filtering the RF signal amplified by the third amplifier to a predetermined band; A fourth amplifier for amplifying a signal filtered from the fifth SAW filter; A third distributor for distributing a signal applied from the fourth amplifier to a first transmission antenna, a second transmission antenna and a CPU; A third attenuator for attenuating the signal transmitted from the third distributor with an attenuation ratio of 10 dB; A fourth attenuator for attenuating the signal transmitted from the second distributor with an attenuation ratio of 20 dB; A first transmission antenna connected to the third attenuator for transmitting an attenuated RF signal; And a second transmit antenna coupled to the fourth attenuator to transmit an attenuated RF signal; A first level sensor for converting a digital signal applied from the second distributor into an analog signal, sensing a signal level in the converted signal, and transmitting a signal to the CPU; A second level sensor for converting a digital signal applied from the third distributor into an analog signal, sensing a signal level in the converted signal and transmitting a signal to the CPU; A temperature sensor for detecting the temperature of the equipment and transmitting a detection signal to the CPU; And a CPU for analyzing signals applied from the first level sensor, the second level sensor, and the temperature sensor to control the system.
In the present invention, the control panel includes a main CPU, a power supply unit for supplying power to the main CPU, a display device for displaying a value adjusted by the main CPU, To be displayed on the display unit. Further, the main CPU of the control panel controls the CPU of the main transmitting / receiving amplifier by RS-232 communication with the CPU of the main transmitting / receiving amplifier.
In the present invention, the power supply unit may include a constant-current power supply unit that supplies constant power and charges the auxiliary battery when the power is constantly supplied; An auxiliary battery which is charged by receiving power from the constant power source and is driven when no power is supplied from the constant power source; And a current sensor for controlling a current supplied through the constant power unit or the auxiliary battery to supply a constant current to the main CPU and the U / V frequency separator.
In the present invention, the FM main amplifier includes: a first band-pass filter for receiving an FM broadcast signal from an outdoor antenna and filtering the signal at a constant bandwidth; An FM first amplifier for amplifying a signal applied from the first band-pass filter; An FM SAW filter for filtering a signal amplified by the FM first amplifier to a predetermined frequency band; An FM second amplifier for amplifying a signal applied from the FM SAW filter; A variable amplifier for variably amplifying a signal applied from the FM second amplifier; A variable attenuator for variably attenuating a signal applied from the variable amplifier; A buffer for buffering a signal applied from the variable attenuator; A second band-pass filter for filtering a signal transmitted from the buffer to a predetermined band; A driver amplifier for amplifying the filtered signal in the second band pass filter; A first low pass filter for impedance coupling to the driver amplifier; A power amplifier for increasing an output of a signal applied from the first low pass filter; A second low pass filter for impedance coupling to the power amplifier; An antenna sense amplifier for amplifying a signal amplified by the FM second amplifier to detect a signal received from an outdoor antenna; an antenna level sensor for sensing a signal level of the antenna from the signal amplified by the antenna sense amplifier and transmitting the amplified signal to the CPU; ; An output signal level detector for sensing a signal level of the power amplifier and transmitting the signal level to the CPU; A temperature sensor which senses the temperature of the equipment and transmits a signal to the CPU; And an FM level controller for receiving the signal from the temperature sensor and adjusting the variable amplifier and the variable attenuator.
In the present invention, the FM control panel includes an FM main CPU, a power supply unit for supplying power to the FM main CPU, a display device for displaying a value adjusted by the FM main CPU, And a key for setting a value to be displayed on the display device. Further, the FM main CPU of the FM control panel controls the FM CPU of the FM transmission amplifier by RS-232 communication with the FM CPU of the FM transmission amplifier.
In the present invention, a line amplifier is connected to a main distributor, a line-termination power amplifier provided at a terminating end of a transmission / reception antenna and other line amplifiers or cables installed on the ground, and a DC power source and an RF signal A DC power bypass unit including a DC regulator circuit for passing the DC power, and first and second DC passing inductors provided on both sides of the DC regulator circuit; An FM band unit connected in parallel with the DC power bypass unit to filter and amplify only the FM signal among the RF signals applied through the main distributor and transmit the RF signal to the line distributor; And a UHF signal transmission unit connected in parallel with the DC power bypass unit and the FM band unit and filtering and amplifying and transmitting only the UHF signal among RF signals applied through the main distributor or the transmission / reception antenna .
The UHF signal transmitter includes a first LC trap filter for reducing harmonics in a UHF signal transmitted from a main distributor, a transmission / reception separator for a line amplifier connected to the first LC trap filter, a first transmission / A pair of line high-pass filters connected in parallel with the separator, a pair of line amplifiers connected to the pair of line high-pass filters, and a pair of line amplifiers connected to the pair of line amplifiers A second high-pass filter connected in parallel with the pair of second high-pass filters, and a second low-pass filter connected to the second low-pass separator to reduce harmonics in a signal transmitted from the low- A second LC trap filter, and a line splitter connected to the second LC trap filter, wherein the pair of line amplifiers are configured to transmit or receive an RF signal to / Are installed in opposite directions to receive the RF signal, the distributor for the line is characterized in that the connection with the transmitting and receiving antenna and the amplifier or other line termination for the power amplifier.
In the present invention, the line amplifier includes a main distributor, a DC regulator circuit connected to a line distributor provided in each layer on the ground, a DC regulator circuit for passing DC power from an RF signal applied through the main distributor, A DC power bypass unit including first and second DC passing inductors provided on both sides of the regulator circuit; An FM band unit connected in parallel with the DC power bypass unit to filter and amplify only the FM signal among the RF signals applied through the main distributor and transmit the RF signal to the line distributor; And a UHF signal transmission unit connected in parallel with the DC power bypass unit and the FM band unit and filtering and amplifying and transmitting only the UHF signal among RF signals applied through the main distributor or the transmission / reception antenna .
The UHF signal transmitter includes a first LC trap filter for reducing harmonics in a UHF signal transmitted from a main distributor, a transmission / reception separator for a line amplifier connected to the first LC trap filter, a first transmission / A pair of line high-pass filters connected in parallel with the separator, a pair of line amplifiers connected to the pair of line high-pass filters, and a pair of line amplifiers connected to the pair of line amplifiers A second high-pass filter connected in parallel with the pair of second high-pass filters, and a second harmonic reduction circuit which is connected to the second transmission / reception separator and receives signals transmitted from the transmission / And the pair of line amplifiers are connected to each other so as to transmit RF signals to the transmission and reception antennas or to receive RF signals from the transmission and reception antennas The UHF signal transmitting unit is connected to the line distributor and transmits or receives a signal from or to a transmission / reception antenna installed in the line distributor.
In the present invention, the termination power amplifier comprises a pair of low-pass filters for filtering only FM signals among RF signals applied through a main divider, and a power amplifying FM amplifier connected between the pair of low-pass filters An FM band section; A high pass filter for power amplifying only a UHF signal in an RF signal applied through the main distributor, a second transceiver duplexer connected to the high pass filter, a transmission amplifier connected to the second transceiver duplexer, And a signal amplifying unit composed of a receiving amplifier unit. The FM band unit is connected to the receiving amplifying unit and is connected to the receiving antenna with one cable.
In the present invention, the transmission amplifying unit includes a first SAW filter for power amplification, a first amplifier for power amplification and a second amplifier for power amplification connected in order to amplify the RF signal filtered by the first SAW filter for power amplification, And a first high pass filter for power amplification connected to the second amplifier for power amplification and connected to the second transmit / receive duplexer, wherein the receive amplifier comprises: a second SAW filter connected to the second transmit / receive duplexer; A third amplifier for power amplification and a fourth amplifier for power amplification connected in order to amplify the RF signal filtered by the second SAW filter for power amplification and a second amplifier for power amplification connected to the fourth amplifier for power amplification, Pass filter, and is connected to the FM band part at a rear end of the second high-pass filter.
The present invention has the effect of enabling smooth communication between the ground and the underground by using one line and reducing construction and installation cost through simplification of equipment.
Further, since the transmitting and receiving antennas can be provided for each layer using the distributor, wireless communication between the ground and the underground can be smoothly performed, and thus it is possible to effectively cope with a fire or the like.
In addition, since the present invention can provide a plurality of transmitting and receiving antennas in a shaded section of the underground, it is possible to smoothly radiate ground and ground.
1 is a system configuration diagram of a fire fighting radio communication system according to the present invention.
2 is a block diagram of a fire safety system according to the present invention.
3 is a configuration diagram of a radio system for FM according to the present invention;
4 is a configuration diagram of a line amplifier according to a first embodiment of the present invention;
5 is a configuration diagram of a line amplifier according to a second embodiment of the present invention;
6 is a configuration diagram of a power amplifier according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, the structure and operation of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a system configuration diagram of a fire fighting radio communication system according to the present invention, FIG. 2 is a configuration diagram of a fire protection radio system according to the present invention, FIG. 3 is a configuration diagram of a radio system for FM according to the present invention, FIG. 5 is a block diagram of a line amplifier according to a second embodiment of the present invention, and FIG. 6 is a block diagram of a power amplifier according to the present invention. FIG.
1 is a block diagram of a fire fighting radio communication system according to the present invention. As shown in the figure, a fire fighting radio communication system according to the present invention is a fire fighting radio communication system comprising a fire
2, the fire
First, the configuration of the
Also, the
In the case of the receiving side, the RF signal transmitted from the
The
The RX /
The transmit / receive
3 shows a
The FM
An
The
The
In addition, the
The
The
4 shows a first embodiment of a line amplifier. In the first embodiment, the
The
The DC
The
5 is a
6 is a configuration diagram of the
The
The
A power
As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.
10: Fire safety system 20: Radio system for FM
30: Outdoor antenna 40: U / V frequency separator
50: main distributor 60: line amplifier
70: Power amplifier
110: main receiving amplifier 120: main transmitting amplifier
130: Transmit / receive duplexer 150: Control panel
200: FM main amplifier 230: FM control panel
610: DC power bypass unit 620: FM band unit
630:
710: FM band section 720:
730:
Claims (14)
A 450 MHz main transmission / reception amplifier for transmitting / receiving a signal to / from the transmission antenna, a control panel connected to the main transmission / reception amplifier for fire, A first transmission / reception duplexer connected to the main transmission / reception amplifier and installed in the underground emergency room;
An FM radio system constituted by an FM main amplifier and an FM control panel connected to the FM main amplifier and installed in an underground emergency room;
An outdoor antenna installed outside the building to transmit an FM signal to the FM main amplifier;
A U / V frequency separator for transmitting a UHF signal to the fire protection radio system, receiving a UHF signal from the fire protection radio system, and receiving a VHF signal from the FM radio system;
A main distributor connected to the U / V frequency separator and installed on the ground or on the ground to transmit signals to or receive signals from each layer of the building;
A plurality of line amplifiers connected to the main distributor; And
And a termination power amplifier provided at an end of the line amplifier,
The main transmission /
A first reception antenna for receiving a first RF signal of the transceiver; A second receiving antenna for receiving a second RF signal of the transceiver; A first attenuator connected to the first reception antenna and having a damping ratio of 10 dB for receiving a first RF signal and attenuating a first RF signal; A second attenuator connected to the second reception antenna and having a damping ratio of 20 dB for receiving a second RF signal to attenuate a second RF signal; A first SAW filter coupled to the first attenuator to receive the attenuated first RF signal and to filter the attenuated first RF signal into a constant-band signal; A second SAW filter coupled to the second attenuator to receive the attenuated second RF signal and to filter the attenuated second RF signal into a predetermined band signal; A first distributor for combining signals filtered by the first SAW filter and the second SAW filter; A first amplifier for amplifying the RF signal synthesized by the first divider; A third SAW filter for filtering the RF signal amplified by the first amplifier to a predetermined band; A second amplifier for amplifying a signal filtered by the third SAW filter; And a second distributor for distributing a signal amplified by the second amplifier to a CPU and a transmission / reception separator and transmitting the signal.
A fourth SAW filter for filtering the RF signal applied from the transmitting / receiving separator to a predetermined band; A third amplifier for amplifying the filtered RF signal from the fourth SAW filter; A fifth SAW filter for filtering the RF signal amplified by the third amplifier to a predetermined band; A fourth amplifier for amplifying a signal filtered from the fifth SAW filter; A third distributor for distributing a signal applied from the fourth amplifier to a first transmission antenna, a second transmission antenna and a CPU; A third attenuator for attenuating the signal transmitted from the third distributor with an attenuation ratio of 10 dB; A fourth attenuator for attenuating the signal transmitted from the second distributor with an attenuation ratio of 20 dB; A first transmission antenna connected to the third attenuator for transmitting an attenuated RF signal; And a second transmit antenna coupled to the fourth attenuator to transmit an attenuated RF signal;
A first level sensor for converting a digital signal applied from the second distributor into an analog signal, sensing a signal level in the converted signal, and transmitting a signal to the CPU;
A second level sensor for converting a digital signal applied from the third distributor into an analog signal, sensing a signal level in the converted signal and transmitting a signal to the CPU;
A temperature sensor for detecting the temperature of the equipment and transmitting a detection signal to the CPU; And
A CPU for analyzing signals applied from the first level sensor, the second level sensor, and the temperature sensor to control the system;
And a control unit for controlling the radio communication system.
The control panel includes:
A main CPU, a power supply unit for supplying power to the main CPU, a display device for displaying a value adjusted by the main CPU, and a key for setting a value controlled by the main CPU to be displayed on the display device And a control unit for controlling the control unit.
Wherein the main CPU of the control panel adjusts the CPU of the main transmission / reception amplifier by RS-232 communication with the CPU of the main transmission / reception amplifier.
The power supply unit,
A constant power supply unit for supplying constant power and charging the auxiliary battery when the power is constantly supplied;
An auxiliary battery which is charged by receiving power from the constant power source and is driven when no power is supplied from the constant power source; And
A current sensor for controlling a current supplied through the normal power supply unit or the auxiliary battery to supply a constant current to the main CPU and the U / V frequency separator;
And a control unit for controlling the control unit.
The FM main amplifier includes:
A first band-pass filter for receiving an FM broadcast signal from an outdoor antenna and filtering the signal at a constant bandwidth; An FM first amplifier for amplifying a signal applied from the first band-pass filter; An FM SAW filter for filtering a signal amplified by the FM first amplifier to a predetermined frequency band; An FM second amplifier for amplifying a signal applied from the FM SAW filter; A variable amplifier for variably amplifying a signal applied from the FM second amplifier; A variable attenuator for variably attenuating a signal applied from the variable amplifier; A buffer for buffering a signal applied from the variable attenuator; A second band-pass filter for filtering a signal transmitted from the buffer to a predetermined band; A driver amplifier for amplifying the filtered signal in the second band pass filter; A first low pass filter for impedance coupling to the driver amplifier; A power amplifier for increasing an output of a signal applied from the first low pass filter; A second low pass filter for impedance coupling to the power amplifier;
An antenna sense amplifier for amplifying a signal amplified by the FM second amplifier to detect a signal received from an outdoor antenna; an antenna level sensor for sensing a signal level of the antenna from the signal amplified by the antenna sense amplifier and transmitting the amplified signal to the CPU; ;
An output signal level detector for sensing a signal level of the power amplifier and transmitting the signal level to the CPU;
A temperature sensor which senses the temperature of the equipment and transmits a signal to the CPU; And
An antenna level sensor, an output signal level sensor, an FM CPU for receiving a signal from the temperature sensor and adjusting the variable amplifier and the variable attenuator;
And a control unit for controlling the control unit.
The FM control panel includes:
A display device for displaying a value adjusted by the FM main CPU, and a display device for displaying a value adjusted by the FM main CPU, so that the display device displays the value adjusted by the FM main CPU. And a key for setting the radio communication terminal.
Wherein the FM main CPU of the FM control panel adjusts the FM CPU of the FM transmission amplifier by RS-232 communication with the FM CPU of the FM transmission amplifier.
The line amplifier includes:
A power amplifier connected to the main distributor and a line termination power amplifier provided at a terminating end of a transmission line and a reception antenna provided in each layer on the ground and another line amplifier or cable,
A DC power bypass unit including a DC regulator circuit for passing the DC power from the DC power source applied through the main distributor and an RF signal and first and second DC passing inductors provided on both sides of the DC regulator circuit;
An FM band unit connected in parallel with the DC power bypass unit to filter and amplify only the FM signal among the RF signals applied through the main distributor and transmit the RF signal to the line distributor; And
A UHF signal transmission unit connected in parallel with the DC power bypass unit and the FM band unit to filter and amplify and transmit only the UHF signal among RF signals applied through the main distributor or the transmission / reception antenna;
And a control unit for controlling the control unit.
The UHF signal transmitter includes:
A first LC trap filter for reducing harmonics in the UHF signal transmitted from the main distributor, a line amplifier transmit / receive separator connected to the first LC trap filter, and a pair connected in parallel with the first line transmitter / A pair of line amplifiers connected to the pair of line high-pass filters, and a pair of second high-pass filters connected to the pair of line amplifiers, A second LC trap filter connected to the second transceiver for reducing harmonics in a signal transmitted from the transceiving antenna, and a second LC trap filter connected to the second transceiver, And a line distributor connected to the second LC trap filter,
The pair of line amplifiers are installed opposite to each other to transmit RF signals to the transmission / reception antennas or receive RF signals from the transmission / reception antennas,
Wherein the line splitter is connected to a transmission / reception antenna and another line amplifier or a termination power amplifier.
The line amplifier includes:
A main distributor connected to the line distributor installed in each layer on the ground,
A DC power bypass unit including a DC regulator circuit for passing the DC power from the DC power source applied through the main distributor and an RF signal and first and second DC passing inductors provided on both sides of the DC regulator circuit;
An FM band unit connected in parallel with the DC power bypass unit to filter and amplify only the FM signal among the RF signals applied through the main distributor and transmit the RF signal to the line distributor; And
A UHF signal transmission unit connected in parallel with the DC power bypass unit and the FM band unit to filter and amplify and transmit only the UHF signal among RF signals applied through the main distributor or the transmission / reception antenna;
And a control unit for controlling the control unit.
The UHF signal transmitter includes:
A first LC trap filter for reducing harmonics in the UHF signal transmitted from the main distributor, a line amplifier transmit / receive separator connected to the first LC trap filter, and a pair connected in parallel with the first line transmitter / A pair of line amplifiers connected to the pair of line high-pass filters, and a pair of second high-pass filters connected to the pair of line amplifiers, And a second LC trap for harmonic reduction in a signal transmitted from a transmission / reception antenna connected to the second transmission / reception separator and connected to the line high- Filter,
The pair of line amplifiers are installed opposite to each other so as to transmit RF signals to the transmission / reception antennas or receive RF signals from the transmission / reception antennas,
Wherein the UHF signal transmission unit is connected to a line distributor and transmits or receives a signal from a transmission / reception antenna provided in the line distributor or from the transmission / reception antenna.
The termination power amplifier comprises:
An FM band unit comprising a pair of low-pass filters for filtering only the FM signal among the RF signals applied through the main distributor, and an FM amplifier for power amplification connected between the pair of low-pass filters; And
A high pass filter for power amplifying only the UHF signal in an RF signal applied through the main distributor, a second transceiver duplexer connected to the high pass filter, a transmission amplifier connected to the second transceiver duplexer, An amplifying unit;
Lt; / RTI >
Wherein the FM band unit is connected to the transmission amplification unit and is connected to the reception antenna through one cable.
Wherein the receiving amplification unit comprises a first SAW filter for power amplification, a first amplifier for power amplification and a second amplifier for power amplification, which are in turn connected in order to amplify the RF signal filtered by the first SAW filter for power amplification, And a first high-pass filter for power amplification connected to a second amplifier for power amplification and connected to the second transmission / reception duplexer,
The transmission amplifier includes a second SAW filter connected to the second transmission / reception duplexer, a third amplifier for power amplification connected in order to amplify the RF signal filtered by the second SAW filter for power amplification, 4 amplifier and a second high-pass filter for power amplification connected to the fourth amplifier for power amplification, and is connected to the FM band unit at a rear end of the second high-pass filter.
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| KR1020150132777A KR101711001B1 (en) | 2015-09-21 | 2015-09-21 | Portable radio telecommunication system for firefighting |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150132777A KR101711001B1 (en) | 2015-09-21 | 2015-09-21 | Portable radio telecommunication system for firefighting |
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| KR101711001B1 true KR101711001B1 (en) | 2017-03-03 |
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| KR1020150132777A KR101711001B1 (en) | 2015-09-21 | 2015-09-21 | Portable radio telecommunication system for firefighting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10447376B2 (en) | 2018-03-15 | 2019-10-15 | Electronics And Telecommunications Research Institute | Wireless communication apparatus and method using transmission line for transferring signal |
| KR102179519B1 (en) * | 2020-09-11 | 2020-11-18 | 주식회사 엘파코리아 | Firefighting wireless communication system and firefighting power line amplifier capable of always-on output of downlink signals in emergency situations |
| KR102213937B1 (en) * | 2020-09-17 | 2021-02-08 | (주)캐스트윈 | Radio communication auxiliary system |
| KR20220060108A (en) | 2020-11-04 | 2022-05-11 | 주식회사 써반 | Wireless communication device for neck microphone |
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| KR970000161B1 (en) * | 1993-11-12 | 1997-01-04 | 이이용 | Radio repeater under ground |
| KR101379507B1 (en) * | 2012-12-31 | 2014-04-29 | 블루넷테크놀러지 주식회사 | Firefighting radio order system by using cable for ultrahigh frequency send and receive |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR970000161B1 (en) * | 1993-11-12 | 1997-01-04 | 이이용 | Radio repeater under ground |
| KR101379507B1 (en) * | 2012-12-31 | 2014-04-29 | 블루넷테크놀러지 주식회사 | Firefighting radio order system by using cable for ultrahigh frequency send and receive |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10447376B2 (en) | 2018-03-15 | 2019-10-15 | Electronics And Telecommunications Research Institute | Wireless communication apparatus and method using transmission line for transferring signal |
| KR102179519B1 (en) * | 2020-09-11 | 2020-11-18 | 주식회사 엘파코리아 | Firefighting wireless communication system and firefighting power line amplifier capable of always-on output of downlink signals in emergency situations |
| KR102213937B1 (en) * | 2020-09-17 | 2021-02-08 | (주)캐스트윈 | Radio communication auxiliary system |
| KR20220060108A (en) | 2020-11-04 | 2022-05-11 | 주식회사 써반 | Wireless communication device for neck microphone |
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