KR940002981Y1 - Underground broadcasting relay-system - Google Patents

Underground broadcasting relay-system Download PDF

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KR940002981Y1
KR940002981Y1 KR2019910005308U KR910005308U KR940002981Y1 KR 940002981 Y1 KR940002981 Y1 KR 940002981Y1 KR 2019910005308 U KR2019910005308 U KR 2019910005308U KR 910005308 U KR910005308 U KR 910005308U KR 940002981 Y1 KR940002981 Y1 KR 940002981Y1
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broadcast
band
signal
broadband
output
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KR920020397U (en
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서원석
심광식
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한국도로공사
권병식
주식회사 대한산업전자
김의숙
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/59—Responders; Transponders

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

내용 없음.No content.

Description

지하방송중계기Underground Broadcasting Repeater

제1도는 본고안 지하방송중계기의 블럭도.1 is a block diagram of the underground broadcast repeater.

제2도는 종래에 사용되어오던 지하방송중계기의 블럭도.2 is a block diagram of a conventional underground broadcasting repeater.

제3도는 대역통과필터(Band Pass Filter)의 간략한 회로예시도.3 is a schematic circuit diagram of a band pass filter.

제4도는 광대역전치증폭기의 회로예시도.4 is a circuit diagram of a broadband preamplifier.

본고안은 터널, 지하주차장, 지하상가등과 같이 지표 혹은 건축구조물의 접지로인하여 발생하는 차폐효과에 의하여 방송전파가 도래하지 못하거나, 신호가 미약하여 방송수신이 불가능한 지역에 설치하여 방송신호를 중계하므로서 지상에서와 같은 양질의 방송써비스로 난청을 해소하기 위한 것이다.In this proposal, the broadcasting signal is not installed due to the shielding effect caused by the grounding of the ground or building structure such as tunnel, underground parking lot, underground shopping mall, etc. By relaying, it is to solve the hearing loss with high quality broadcasting service like on the ground.

종래의 방송중계장치는 별첨도면 제2도에서 보는 바와같이 수신공중선을 통하여 수신된 전파를 여러개의 AM, FM 방송채널(Channel)중계기로 나누어 각각 증폭하였으며 그 설명은 다음과 같다.The conventional broadcast relay device amplifies the radio wave received through the receiving air line into a plurality of AM and FM broadcast channel repeaters, respectively, as shown in FIG.

1. AM 방송채널 중계기1. AM Broadcasting Channel Repeater

제2도에서 보는 바와같이 AM방송채널 중계기는 방송국별로 선정된 여러개의채널증폭기에서 증폭된 방송신호를 합성하여 공중선에 급전한다.As shown in FIG. 2, the AM broadcast channel repeater synthesizes broadcast signals amplified by several channel amplifiers selected by broadcasting stations and feeds them to the aerial.

2. FM 방송채널 중계기2. FM broadcasting channel repeater

제2도에서 보는 바와같이 FM 방송채널중계기는 방송국별로 FM 방송을 수신검파하여 얻어진 음성신호(Audio Signal)를 FM 송신기를 통하여 다시 주파수 변조 및 증폭하여 그 송신출력을 합성하여 공중선에 급전한다.As shown in FIG. 2, the FM broadcast channel repeater modulates and amplifies an audio signal obtained by receiving and detecting FM broadcast for each broadcasting station again through an FM transmitter, synthesizes its transmission power, and feeds it to the aerial.

위와같이 종래의 중계장치는 방송국별 채널중계기를 설치함에 있어서는 여러개의 증폭기, 수신기, 송신기를 사용하므로 장치가 복잡하여 가격이 비싸지고, 또한 FM 채널중계기에 있어서는 수신하여 검파된 신호를 재송신하기 위하여 FM 변조를 다시 시키므로 주파수가 편이될 수있으며, 변조특성이 나빠지는 결점을 가지며, 또한 기존 방송국이 생기면 이에 해당하는 채널중계기를 설치해야 하는 번거로움이 있었다.As described above, the conventional repeater uses a plurality of amplifiers, receivers, and transmitters to install a channel repeater for each broadcasting station, and thus, the apparatus is complicated and expensive. The frequency can be shifted by re-modulation, and the defects of the modulation characteristics deteriorate, and when there is an existing broadcasting station, there is a hassle to install a corresponding channel repeater.

본고안은 상기와 같은 문제점을 해소하기 위하여 안출한 것으로써 AM, FM 방송을 공히 광대역 증폭방식을 사용하므로써 구조를 간단히 할 수 있으며, 주파수가 변경되더라도 별도의 조정이 필요치 않으므로 사용에 편리를 기할 수 있도록 함에 목적이 있다.In order to solve the above problems, this paper can simplify the structure by using wideband amplification method for AM and FM broadcasting, and it is convenient to use because no adjustment is required even if the frequency is changed. The purpose is to make it work.

본고안의 또다른 목적은 구성을 간단히 하여 방송중계장치를 소형화 할 수 있으며, 유지보수의 편리성을 도모함에 있다.Another object of this paper is to simplify the configuration, miniaturize the broadcast relay device, and to facilitate the maintenance.

상기 목적을 달성하기 위한 본고안은 수신용 공중선 안테나를 통해 입력되는 방송신호를 증폭하여 출력하는 광대역 전치증폭기와, 상기 광대역 전치증폭기에서 출력되는 신호는 AM 방송중계시스템과 FM 방송중계시스템으로 분기되며, 상기 방송중계시스템은 AM 또는 FM 방송밴드의 주파수 신호만을 통과시키는 대역와 상기 대역필터에서 출력된 신호를 일정한 증폭 이득만큼 증폭하는 광대역 증폭기와 상기 광대역 증폭기의 출력신호를 입력하며 AM 또는 FM 방송밴드의 주파수 신호만을 통과시키는 밴드패스필터와 상기 밴드패스필터의 출력신호를 입력하며 입력된 신호를 전력 증폭하는 광대역 전력 증폭기로 구성됨을 특징으로 한다.The present invention for achieving the above object is a broadband preamplifier for amplifying and outputting a broadcast signal input through the receiving antenna antenna, the signal output from the broadband preamplifier is branched into an AM broadcast relay system and FM broadcast relay system The broadcast relay system inputs a band for passing only a frequency signal of an AM or FM broadcast band, a broadband amplifier for amplifying a signal output from the band filter by a constant amplification gain, and an output signal of the broadband amplifier. And a broadband power amplifier for inputting an output signal of the band pass filter and a power amplifier for power amplifying the input signal.

이하 상기 목적을 달성하기 위한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment for achieving the above object will be described in detail with reference to the accompanying drawings.

우선 제1도를 참조하여 본고안의 구성을 설명하면, 공중수신안테나(ANT1)를 통해 수신되는 신호를 증폭하기 위하너 광대역 전치증폭기(1)와, 상기 광대역 전치증폭기(1)에 의해 증폭된 신호는 AM 방송중계시스템(10)과 FM 방송중계시스템(20)으로 신호를 출력하게 되며 상기 출력신호는 AM 방송대역의 주파수는 AM 방송용 대역필터(11)에 입력되며, 상기 AM 방송용 대역필터(11)에서 필터링된 AM 방송대역의 주파수신호는 광대역 증폭기(12)에 입력되도록 연결하며, 상기 광대역 증폭기(12)에서 증폭된 신호는 밴드패스필터(13)에 입력되도록 연결하며, 상기 밴드패스필터(13)에서 필터링된 신호는 광대역 전력증폭기(14)에 입력되도록 연결하며 상기 광대역 전력증폭기(14)에서 증폭된 신호는 분배기(15)에 입력되도록 연결하며 상기 분배기(15)에서 분리된 신호는 정합장치(16)를 거쳐 AM 방송송신안테나(ANT2)를 통해 송신되도록 구성한다.First, referring to FIG. 1, the configuration of the present invention will be described. The signal amplified by the wideband preamplifier 1 and the wideband preamplifier 1 to amplify the signal received through the aerial receiving antenna ANT1. The signal is output to the AM broadcast relay system 10 and the FM broadcast relay system 20. The output signal is inputted to the AM broadcast band filter 11, and the frequency of the AM broadcast band is inputted to the AM broadcast band filter 11. The frequency signal of the AM broadcast band filtered by the N-B is connected to the wideband amplifier 12, and the signal amplified by the wide-band amplifier 12 is connected to be input to the bandpass filter 13, and the bandpass filter ( The signal filtered in 13 is connected to be input to the broadband power amplifier 14, and the signal amplified by the broadband power amplifier 14 is connected to be input to the divider 15, and the signal separated from the divider 15 is matched. chapter Is configured to be transmitted via the AM broadcast transmission antenna ANT 2 via the device 16.

또한, 광대역 전치증폭기(1)에서 증폭되어 출력되는 신호중 FM 방송신호는 FM 방송용 대역필터(21)에 입력되며, 상기 FM 방송용 대역필터(21)에서 필터링된 FM 방송대역의 주파수 신호는 광대역 증폭기(22)에 입력되도록 연결하며 상기 광대역 증폭기(22)에서 증폭된 출력신호는 밴드패스필터(23)에 입력되도록 연결하며, 상기 밴드패스필터(23)에서 필터링된 신호는 광대역 전력증폭기(24)에 입력되도록 연결하며, 상기 광대역 전력증폭기(24)에서 증폭된 신호는 분배기(25)에 입력되도록 연결하며, 상기 분배기(25)에서 분리된 신호는 정합장치(26)를 거쳐 FM 방송송신안테나(ANT3)를 통해 송신되도록 구성한다.In addition, the FM broadcast signal among the signals amplified and output from the wideband preamplifier 1 is input to the FM broadcast band filter 21, and the frequency signal of the FM broadcast band filtered by the FM broadcast band filter 21 is a broadband amplifier ( The output signal amplified by the broadband amplifier 22 is input to the band pass filter 23, and the signal filtered by the band pass filter 23 is connected to the broadband power amplifier 24. The signal amplified by the broadband power amplifier 24 is input to the splitter 25, and the signal separated from the splitter 25 is passed through the matching device 26 to the FM broadcast transmitting antenna (ANT). 3 ) to transmit through.

이와같이 구성되는 본고안의 작용효과는 공중수신안테나(ANT1)에서 유기되는 고주파세력은 광대역 전치증폭기(1)에 입력되며, 이때 인입된 신호는 제4도에 도시한 바와같이 어레스터(AR1)와 2개의 다이오드(D1,D2)로 구성된 보호회로와 광대역 트랜스(T1)와, 광대역트랜스(T1)통해 전달되는 신호를 증폭하여 출력하는 증폭기(I1,I2)와 광대역 트랜스(T2)로 구성되며 위와같이 구성되는 광대역 전치증폭기는 안테나(ANT)를 통해 수신되는 고주파 신호를 증폭시켜 출력하게 되는데 이때 어레스터(AR1)와 다이오드(D1,D2)로 이루어진 보호회로(41)에서 낙뢰, 또는 이상전압등의 부하가 발생할 경우 다이오드(D1,D2)를거쳐 접지되어 내부 회로의 파괴를 방지하게 되는 것이며, 상기 보호회로(41)를 통해 전달된 신호는 광대역트랜스(T1)를 통해 증폭회로(42)에서 증폭되는데 상기 증폭회로(42)는 0.1㎒-1.5㎒사이를 증폭할수있는 광대역증폭기로써 충분히 증폭되어지며, 광대역 증폭기의 50Ω의 동축케이블과 증폭기 출력과의 임피던스매칭 및 주장치로 부터의 동축케이블에 중첩되어진 DC 전원을 광대역 전치 증폭기에 공급하며, 이렇게 공급되어진 DC 전원은 안정된 고주파 신호의 증폭을 위한 정전압소자(I3)와 항상 정전압을 유기토록하며 캐패시터(C5,C6,C7,C8)는 외부잡음 및 전원리플을 제거하여 광대역 증폭기(I1,I2)에 안정된 전압을 공급하게 되며 광대역트랜스(T3)와 동축케이블을 통한 고주파신호는 주장치에서 분리되어 AM 방송중계기와 FM 방송중계기로 연결되어 AM, FM 대역의 수신 전파를 중계하게 되는데 이를 좀더 구체적으로 설명하면 광대역 전치 증폭기(1)에서 분리되어 출력된 고주파 신호중 AM 방송신호는 AM 방송대역 필터(11)에 입력되어지며, 상기 AM 방송대역필터(11)는 AM 방송대역에 해당하는 500-1600㎑의 신호만을 통과시키며 그외 다른 신호는 통과시키지 않는 밴드 패스필터이다.The operational effect of the present invention, which is configured in this way, is a high frequency force induced in the aerial antenna (ANT 1 ) is input to the broadband preamplifier (1), wherein the incoming signal is shown in Figure 4 the arrester (AR 1 ) And a protection circuit composed of two diodes (D 1 , D 2 ), a wide band transformer (T 1 ), and an amplifier (I 1 , I 2 ) and a wide band transformer for amplifying and outputting a signal transmitted through the wide band transformer (T 1 ). The broadband preamplifier configured as (T 2 ) and configured as described above amplifies and outputs a high frequency signal received through the antenna ANT, wherein the protection consisting of the arrester AR 1 and the diodes D 1 and D 2 is applied. When a load such as a lightning strike or abnormal voltage occurs in the circuit 41, the diode D 1 and D 2 are grounded to prevent breakage of the internal circuit, and the signal transmitted through the protection circuit 41 is Amplification circuit 42 through broadband transformer T1 The amplification circuit 42 is sufficiently amplified by a broadband amplifier capable of amplifying between 0.1 MHz and 1.5 MHz, and overlaps the 50 kHz coaxial cable of the broadband amplifier with impedance matching between the amplifier output and the coaxial cable from the main device. The supplied DC power is supplied to the broadband preamplifier. The supplied DC power supplies the constant voltage element (I 3 ) and the constant voltage at all times to amplify the stable high frequency signal, and the capacitors (C 5 , C 6 , C 7 , C 8). ) Supplies stable voltage to broadband amplifiers (I 1 and I 2 ) by removing external noise and power ripple, and the high frequency signal through wideband transformer (T 3 ) and coaxial cable is separated from the main unit, and AM broadcast repeater and FM broadcast It is connected to a repeater to relay the received radio waves of AM and FM bands, which will be described in more detail. The high frequency signal separated and output from the wideband preamplifier 1 The AM broadcast signal is input to the AM broadcast band filter 11, and the AM broadcast band filter 11 passes only a signal of 500-1600 Hz corresponding to the AM broadcast band and does not pass other signals. Filter.

상기 밴드패스필터는 제3도에 도시한 바와같이 온도특성이 양호한 인덕턴스(L1,L2,L3)와 캐피시터(C1,C2)로 이루어진 저역통과필터(31)와 증폭기(I5)로 구성되는 증폭회로(32)로 구성되며 캐피시터(C6,C7,C8)와 인덕턴스(L4,L5,L6)로 구성되는 고역통과필터(33)로 구성되며 저역 통과필터(31)에서는 AM 방송대역의 상한주파수 이하의 방송신호만을 통과시키며 이렇게 저역통과필터를 거치면서 필터링되어 감쇄된 방송신호는 증폭회로(32)에서 증폭하여 입력과 출력신호 레벨을 같게하여 출력하며, 상기 출력신호는 캐패시터(C6,C7,C8)와 인덕턴스(L4,L5,L6)으로 구성된 고역통과 필터에서 하한 주파수 이상의 신호만을 통과시키도록 하여 AM 방송대역의 신호만을 추출하도록 구성되어 있다. 이와같이 AM 방송대역의 주파수만으로 필터링된 신호는 광대역 증폭기(12)에 연결되어 증폭이득을 갖도록 설계되어 있고 이출력은 밴드패스필터(13)에 연결되어 필터링되어 출력된다. 위와같은 중계장치에 의해 수신된 신호를 광대역 전력증폭기(14)에서 증폭시켜 AM 방송송신안테나(ANT2)를 통해 출력시킬 수 있게 되는 것이며, 하나의 주장치로부터 여러개의 터널, 또는 지하상기 중에 중계하고자 할때에는 전력증폭기에서 출력되는 신호를 분배기(15)를 통해 정합장치(16)에 연결된 방송송신안테나(ANT2)를 통해 전파를 복사할 수 있게 되는데, 이때에는 광대역전력증폭기(14)에서 출력되는 신호는 AM 방송대역 신호만을 전력증폭하여 분배기(15)를 통해 50Ω의 동축케이블을 통하여 정합장치에 연결된다. 이 정합장치는 공중선 임피던스(Impidance)와 분배기(15)의 출력 임피던스를 정합(matching)시켜 주는 장치이며 임피던스 정합에 의해 불필요한 전력 손실을 방지하여 최대한 전력이 전달되도록 하는 장치이며, 이는 AM 방송송신 공중선에 연결되어 고주파 신호를 복사시키므로서 난청을 해소하게 된다.The band pass filter includes a low pass filter 31 and an amplifier I 5 having inductances L 1 , L 2 , L 3 and capacitors C 1 , C 2 having good temperature characteristics, as shown in FIG. 3. ) it consists of an amplifier circuit 32 consisting of, and capacitors (C 6, C 7, C 8) and the inductance (L 4, L 5, L 6) consists of a high-pass filter 33 consisting of, and a low pass filter At 31, only the broadcast signal below the upper limit frequency of the AM broadcast band is passed. The filtered and attenuated broadcast signal passed through the low pass filter is amplified by the amplification circuit 32 to output the same level as the input and output signal, The output signal is a high pass filter composed of capacitors (C 6 , C 7 , C 8 ) and inductance (L 4 , L 5 , L 6 ) so as to pass only signals above the lower limit frequency so as to extract only signals of AM broadcast band. Consists of. As such, the signal filtered by only the frequency of the AM broadcast band is designed to have amplification gain by being connected to the wideband amplifier 12, and this output is connected to the band pass filter 13 to be filtered out. The signal received by the repeater as described above is amplified by the broadband power amplifier 14 and can be output through the AM broadcast transmission antenna ANT 2 , to relay in multiple tunnels or underground air from one main device. At this time, the signal output from the power amplifier is able to copy the radio wave through the broadcast transmission antenna ANT 2 connected to the matching device 16 through the splitter 15, in this case is output from the broadband power amplifier 14 The signal is amplified by only the AM broadcast band signal and connected to the matching device via a 50 kHz coaxial cable through a splitter 15. This matching device is a device that matches the aerial impedance and the output impedance of the divider 15 and prevents unnecessary power loss by the impedance matching. It is connected to the high frequency signal to radiate the hearing loss.

상기 과정에서는 AM 방송중계시스템에 대하여 설명하였지만, FM 방송중계시스템도 동일한 작용을 하게되는데 이때에는 FM 방송 대역필터(210에서 FM 방송전파만을 필터링하게 되는데 FM 방송 대역필터(21)에서는 광대역전치증폭기(1)에서 증폭된 고주파신호중 FM 방송대역에 해당하는 87㎒~109㎒의 신호만을 통과시키며, 이 이외의 다른 신호는 통과시키지 않는 밴드패스필터(Bandpass Filter)이다. 이렇게 FM 방송용 대역필터를 통과된 신호는 0.1㎒-1.5㎒광대역 증폭기(22)에 연결되어 FM 방송대역의 신호만 증폭되며, 대역내의 모든 주파수에서 일정한 증폭이득을 갖도록 설계되어있고 이 출력은 밴드패스필터(23)에 연결되어 다시 87㎒-109㎒의 신호만을 통과시키며 기타 신호는 통과시키지 않는다. 밴드패스필터(23)의 출력은 광대역 전력증폭기(Wideband Power Ampifier)(24)에 연결되어 FM 방송대역의 신호만을 전력증폭하여, 방송신호를 안테나(ANT3)를 통해 출력하게 되며, 상기 출력신호를 다수의 터널 또는 지하에 송출할 경우 상기 출력신호를 분배기(25)를 통해 정합장치(26)를 거쳐 다수의 공중선에 연결되도록 출력을 분배하여 주며, 분배기의 출력은 정합장치(26)를 거쳐 FM 공중선에 연결되어 전파를 방사하게 되어 여러개의터널 또는 지하에서 FM 방송수신을 할 수 있도록 하여준다.In the above process, the AM broadcast relay system has been described, but the FM broadcast relay system performs the same function. At this time, the FM broadcast band filter 210 filters only the FM broadcast waves. The FM broadcast band filter 21 uses the broadband preamplifier ( It is a bandpass filter which passes only 87MHz ~ 109MHz signal corresponding to FM broadcasting band among the amplified high frequency signals in 1) and does not pass other signals. The signal is connected to the 0.1MHz-1.5MHz wideband amplifier 22 so that only the signal of the FM broadcasting band is amplified and designed to have a constant amplification gain at all frequencies in the band, and this output is connected to the bandpass filter 23 again. Only the 87MHz-109MHz signal is passed and no other signals are passed in. The output of the bandpass filter 23 is a wideband power amplifier 24. Connection is matched with a case where only the signal in the FM broadcast band, power amplification, transmits a broadcast signal to the output signal, and to output through an antenna (ANT 3) a number of tunnels or underground divider the output signal 25 The output is distributed to be connected to a plurality of aerials via the device 26, and the output of the distributor is connected to the FM aerial via the matching device 26 to radiate radio waves to receive FM broadcast in multiple tunnels or underground. To make it possible.

위와같이 본고안은 AM 밴드패스필터와 FM 밴드패스필터를 통해 얻어진 방송신호를 광대역 0.1㎒-1.5㎒증폭기로 증폭하여 균등한 대역증폭을 얻을 수 있으며 AM, FM 공히 광대역증폭방식으로 동일한 설계 및 동일한 부품으로구성할 수 있으며 무조정화하여 방송중계장치를 소형, 간편, 유지보수의 편리성을 도모할 수 있으며 한번의 설치로 신규방송의 추가 및 방송주파수의 변경에 따른 시설의 재투자 없이 양질의 방송써비스 및 난청을 해소토록 한 재방송장치이다.As described above, this proposal amplifies the broadcast signal obtained through AM bandpass filter and FM bandpass filter with a wideband 0.1MHz-1.5MHz amplifier to obtain an even band amplification. It can be composed of parts, and it can adjust the broadcasting relay device to be small, simple, and convenient in maintenance by adjusting it without any adjustment. High quality broadcasting service without additional investment of facility by adding new broadcasting and changing broadcasting frequency with one installation. And a re-broadcast device to eliminate hearing loss.

Claims (5)

수신용 공중선에 유기된 방송신호를 송신용 공중선으로 중계하는 지하방송중계기에있어서, 수신용 공중안테나로 수신되는 방송신호를 전치증폭하여 출력하는 광대역 전치증폭기와, 상기 광대역 전치증폭기의 출력단자에 접속되어 상기 전치 증폭된 방송신호를 해당 방송대역의 주파수 대역으로 대역필터링하여 출력하는 대역필터와, 상기 대역필터의 출력단자에 접속되어 상기 대역필터링되어 출력되는 방송신호를 일정한 레벨의 신호로 증폭하여 출력하는 광대역 증폭기와, 일정한 레벨의 신호로 증폭하여 출력하는 광대역 증폭기의 출력단자로 부터 출력되는 방송신호를 밴드패스 필터링하여 출력하는 밴드패스필터와, 상기 밴드패스필터로 부터 밴드패스 필터링되어 출력되는 방송신호를 전력증폭하여 공중선으로 복사하는 광대역 전력증폭기로 구성함을 특징으로 하는 지하방송중계기.In the underground broadcasting repeater which relays the broadcast signal transmitted to the receiving aerial to the transmitting aerial, Broadband preamplifier which preamplifies and outputs the broadcast signal received by the receiving aerial antenna, and is connected to the output terminal of the broadband preamplifier And a band pass filter for band pre-amplifying the broadcast signal to a frequency band of the corresponding broadcast band, and a band filter for outputting the band-filtered output signal connected to an output terminal of the band filter to a predetermined level signal. A bandpass filter for bandpass filtering and outputting a broadcast signal output from an output terminal of the broadband amplifier for amplifying and outputting a signal of a predetermined level, and a bandpass filter for outputting the bandpass filter from the bandpass filter. Broadband power amplifiers that amplify and radiate signals to the aerial Underground broadcasting repeater, characterized in that the configuration. 제1항에 있어서, 상기 대역필터는 AM 방송 주파수대역의 신호만을 필터링하여 출력함을 특징으로 하는 지하방송중계기.The underground broadcast repeater of claim 1, wherein the band filter filters and outputs only signals of an AM broadcast frequency band. 제1항에 있어서, 상기 대역필터는 FM 방송 주파수대역의 신호만을 필터링하여 출력함을 특징으로 하는 지하방송중계기.The underground broadcast repeater according to claim 1, wherein the band filter filters and outputs only signals of an FM broadcast frequency band. 제2항 또는 제3항에 있어서, 소정의 간격으로 이격된 위치에 각각 놓여져 있으며 전력증폭되어 입력되는 방송신호를 각각의 출력단자에 접속된 공중선으로 복사하는 적어도 하나 이상의 정합장치와 상기 광대역 전력증폭기의 출력단자와 상기 정합장치들의 각각의 입력단자 사이에 접속되어 상기 전력증폭된 방송신호를 상기 정합장치들의 각각의 입력단자로 분배하는 분재기를 더 포함하여 구성됨을 특징으로 하는 지하 방송중계기.4. The broadband power amplifier according to claim 2 or 3, wherein at least one matching device and the broadband power amplifier which are placed at positions spaced at predetermined intervals and which are amplified and radiate the inputted broadcast signal to an aerial connected to each output terminal. And a bonsai device connected between an output terminal of the matching device and an input terminal of each of the matching devices to distribute the power-amplified broadcast signal to each of the input terminals of the matching devices. 수신용 공중선에 유기된 방송신호를 송신용 공중선으로 중계하는 지하방송중계기에 있어서, 수신용 공중안테나로 수신되는 방송신호를 전치 증폭하여 출력하는 광대역 전치증폭기(1)와, 상기 광대역 전치증폭기의 출력단자에 접속되어 상기 전치 증폭된 방송신호를 AM, FM 방송대역의 주파수로 각각 대여 필터링하여 출력하는 AM 방송용 대역필터(11) 및 FM 방송용 대역필터(21)와, 상기 AM 방송용 대역필터(11)및 FM 방송용 대역필터(21)의 각각의 출력단자에 각각 접속되어 있으며, AM 및 FM 대역필터링된 AM 및 FM 방송신호를 일정한 레벨의신호로 각각 증폭하여 출력하는 광대역 증폭기(12)(22)와 일정한 레벨의 신호로 증폭되어 상기 광대역 증폭기(12)(22)의 각각의 출력 단자로 부터 출력되는 AM, FM 방송신호를 AM 및 FM 방송대역의 주파수로 각각 밴드패스 필터링하여 출력하는 밴드패스필터(13)(23)와, 상기 밴드패스필터(13)(23)로부터 각각 밴드패스필터링되어 출력되는 AM 및 FM 방송신호를 각각 전력증폭하여 출력하는 광대역 전력증폭기(14)(24)와 상기 광대역 전력증폭기(14)(24)의 각각의 출력단자로 부터 출력되는 AM 및 FM 방송신호를 소정의 간격으로 이격된 위치에 놓여진 안테나들로 각각 분배하는 분배기(15)(25)로 구성함을 특징으로 하는 지하 방송중계기.In the underground broadcasting repeater for relaying the broadcast signal induced in the receiving aerial to the transmitting aerial, the broadband preamplifier (1) for preamplifying and outputting the broadcast signal received by the receiving aerial antenna, and the output of the broadband preamplifier An AM broadcast band filter 11 and an FM broadcast band filter 21 connected to a terminal for lease filtering the preamplified broadcast signal to frequencies of AM and FM broadcast bands, respectively, and the AM broadcast band filter 11. And broadband amplifiers 12 and 22 connected to respective output terminals of the FM broadcast band filter 21, respectively, for amplifying and outputting the AM and FM band-filtered AM and FM broadcast signals into signals of a predetermined level. Abandoning the AM and FM broadcast signals, which are amplified by a signal of a predetermined level and output from the respective output terminals of the broadband amplifiers 12 and 22, to bandpass filtering of the AM and FM broadcast bands, respectively. And a wideband power amplifier 14 for amplifying and outputting the band pass filters 13 and 23 to be output and the AM and FM broadcast signals which are band pass filtered and output from the band pass filters 13 and 23, respectively. And a splitter 15 for distributing AM and FM broadcast signals output from the respective output terminals of the broadband power amplifiers 14 and 24 to the antennas positioned at spaced intervals, respectively. Underground broadcast repeater, characterized in that consisting of.
KR2019910005308U 1991-04-17 1991-04-17 Underground broadcasting relay-system KR940002981Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990018816A (en) * 1997-08-28 1999-03-15 신윤식 Indoor subscriber device communication method and device therefor in WLL and IMT-2000 system
KR101725435B1 (en) 2016-02-22 2017-04-12 우주통신주식회사 Relay for retransmitting of fm/dmb broadcast in underground space and method for transmitting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990018817A (en) * 1997-08-28 1999-03-15 신윤식 Communication method and device for WLL and IMT-2000 signals using broadband subscriber line subscriber system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990018816A (en) * 1997-08-28 1999-03-15 신윤식 Indoor subscriber device communication method and device therefor in WLL and IMT-2000 system
KR101725435B1 (en) 2016-02-22 2017-04-12 우주통신주식회사 Relay for retransmitting of fm/dmb broadcast in underground space and method for transmitting

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