KR19980023440A - Multiplexed Signal Transmission Circuit Using Multiplexer - Google Patents

Multiplexed Signal Transmission Circuit Using Multiplexer Download PDF

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Publication number
KR19980023440A
KR19980023440A KR1019960042928A KR19960042928A KR19980023440A KR 19980023440 A KR19980023440 A KR 19980023440A KR 1019960042928 A KR1019960042928 A KR 1019960042928A KR 19960042928 A KR19960042928 A KR 19960042928A KR 19980023440 A KR19980023440 A KR 19980023440A
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South Korea
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high frequency
signal
power
cable
transmission circuit
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KR1019960042928A
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Korean (ko)
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KR100211735B1 (en
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김병철
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정장호
엘지정보통신 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

본 발명의 목적은 각각 다른 주파수를 갖는 다수의 고주파신호 및 직류전원을 1개의 케이블을 통하여 전송할 수 있는 복합신호전송회로를 제공하는 데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a complex signal transmission circuit capable of transmitting a plurality of high frequency signals and direct current power supplies having different frequencies through one cable.

본 발명에 따른 복합 신호전송회로는 고주파신호와 직류전원이 결합된 신호를 전송하는 1개의 케이블과 상기 케이블의 양단에 접속하여 신호를 결합하고 분리하는 신호결합분리수단을 포함하는 복합신호전송회로에 있어서, 상기 신호결합분리수단은 각각의 주파수대역을 통과시키는 대역통과필터(BPF1-BPFN)와, 상기 대역통과필터(BPF1-BPFN)와 일 대 일로 연결되고 다른 고주파신호단과 분리도(Isolation)를 유지하기 위한 고주파 분리수단(IM1-IMN)과, 상기 고주파 분리수단(IM1-IMN)의 전단에서 직류전원이 고주파신호(N1-NN)으로 유입되는 것을 차단하는 직류전원 유입방지수단(11)과, 직류전원 유입방지수단(11)의 전단으로 직류전원단(ND)으로 고주파신호가 유입되는 것을 방지하는 고주파 유입방지수단(12)을 포함하는 멀티플렉서인 것을 특징으로 한다.The composite signal transmission circuit according to the present invention includes a cable for transmitting a signal coupled to a high frequency signal and a direct current power source, and a signal coupling separation means for connecting and separating signals by connecting to both ends of the cable. In one embodiment, the signal coupling separation means is connected to the band pass filter (BPF1-BPFN) and the band pass filter (BPF1-BPFN) to pass each frequency band in a one-to-one manner and to separate the high frequency signal stage and isolation (Isolation). High frequency separation means (IM1-IMN) for maintaining, DC power inflow prevention means (11) for blocking the direct current from flowing in the high frequency signal (N1-NN) in front of the high frequency separation means (IM1-IMN) and , A multiplexer including a high frequency inflow preventing means 12 for preventing a high frequency signal from flowing into the DC power supply terminal ND in front of the DC power inflow preventing means 11.

이렇게 함으로써, 다수개의 고주파 신호 및 보다 큰 직류전력을 결합하여 전달할 수 있다.In this way, a plurality of high frequency signals and a larger DC power can be combined and transmitted.

Description

멀티플렉서를 이용한 복합신호 전송신호Multiplexed Signal Transmission Signal Using Multiplexer

본 발명은 신호전송회로에 관한 것으로, 보다 상세히는 직류전원 및 다수의 고주파신호를 결합하여 전송하는 복합신호 전송회로에 관한 것이다.The present invention relates to a signal transmission circuit, and more particularly, to a complex signal transmission circuit for combining and transmitting a DC power supply and a plurality of high frequency signals.

종래에는 고주파신호 및 직류전원을 전송하는 경우 고주파신호용 케이블 및 직류전원용 케이블을 각각 사용하거나, 바이어스 티(Bias Tee)를 사용하고 있었다.Conventionally, when transmitting a high frequency signal and a DC power source, a high frequency signal cable and a DC power cable are used, or a bias tee is used.

도1은 바이어스 티에 의한 신호전송회로의 구성도이다. 도1의 구성을 보면, 한 개의 케이블(1)과, 상기 케이블(1)의 양단에 접속되는 제1바이어스 티(2) 및 제2바이어스 티(3)를 포함하며, 바이어스 티(2, 3)는 인덕턴스(L1, L2)를 포함하는 1개의 직류전원단(4, 5), 커패시턴스(C1, C2)를 포함하는 1개의 고주파신호단(6, 7)으로 구성된다.1 is a configuration diagram of a signal transmission circuit by a bias tee. Referring to the configuration of FIG. 1, one cable 1 and a first bias tee 2 and a second bias tee 3 connected to both ends of the cable 1 are included. Is composed of one DC power supply terminal 4, 5 including inductances L1, L2, and one high frequency signal terminal 6, 7 including capacitances C1, C2.

직류전원단(4, 5)과 교류신호단(6, 7)은 공통으로 케이블(1)에 접속되고 바이어스티(2, 3)는 신호를 결합하고 분리하는 수단이다.The DC power supply terminals 4, 5 and the AC signal terminals 6, 7 are commonly connected to the cable 1, and the biases 2, 3 are means for combining and separating signals.

도1에 따른 신호 및 직류전원의 전송과정을 설명한다.A transmission process of a signal and a DC power source according to FIG. 1 will be described.

양 방향으로 신호전송이 기능하지만, 본 설명을 위하여 제1바이어스 티(2)를 송신측, 제2바이어스 티(3)를 수신측으로 가정한다. 제1바이어스 티(2)의 고주파신호단(6) 및 직류전원단(4)을 통하여 각각 고주파신호 및 직류전원이 입력되어 케이블(1)과의 접속점에서 결합된다. 결합된 신호는 케이블(1)을 경유하여 제2바이어스 티(3)의 케이블과의 접속점에서 고주파신호는 커패시터(C2)를 통과하여 고주파신호단(7)으로 출력되고, 직류전원은 인덕턴스(L2)를 통과하여 직류전원단(5)으로 출력된다.Although signal transmission functions in both directions, for the purposes of this description, it is assumed that the first bias tee 2 is the transmitting side and the second bias tee 3 is the receiving side. The high frequency signal and the DC power are input through the high frequency signal terminal 6 and the DC power terminal 4 of the first bias 2, respectively, and are coupled at the connection point with the cable 1. The combined signal is output to the high frequency signal terminal 7 through the capacitor C2 at the connection point with the cable of the second bias 3 via the cable 1, and the direct current power source is the inductance L2. ) Is output to the DC power supply terminal (5).

직류전원과 고주파신호를 결합하여 전송하는 신호전송회로는 각각 다른 주파수를 갖는 다수의 고주파신호 및 고전력을 1개의 케이블을 통하여 전송할 수 있는 것이 바람직 한 데, 종래의 바이어스 티를 사용한 신호전송회로에서는 1개의 고주파신호만을 전송할 수 있고, 저전력의 직류전원만을 전달할 수 있다는 문제점이 있었다.The signal transmission circuit that combines and transmits a DC power supply and a high frequency signal is preferably capable of transmitting a plurality of high frequency signals and high powers having different frequencies through one cable. In a conventional signal transmission circuit using a bias tee, Only high frequency signals can be transmitted and there is a problem that only a low power DC power source can be transmitted.

본 발명의 목적은 각각 다른 주파수를 갖는 다수의 고주파신호 및 직류전원을 1개의 케이블을 통하여 전송할 수 있는 복합신호 전송회로를 제공하는 데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a composite signal transmission circuit capable of transmitting a plurality of high frequency signals and direct current power supplies having different frequencies through one cable.

도1은 바이어스 티에 의한 신호전송회로의 구성도1 is a block diagram of a signal transmission circuit using a bias tee

도2는 본 발명에 따른 멀티플렉서의 구성도2 is a block diagram of a multiplexer according to the present invention;

도3은 본 발명의 실시예에 따른 멀티플렉서의 구성도3 is a block diagram of a multiplexer according to an embodiment of the present invention;

＊도면의 주요부분에 대한 부호의 설명＊＊ Description of symbols for main parts of the drawings ＊

BPF : 대역통과필터IM : 고주파분리수단BPF: Bandpass Filter IM: High Frequency Separation Means

L : 인덕턴스C : 커패시턴스L: Inductance C: Capacitance

도2는 본 발명에 따른 멀티플렉서의 구성도이다. 도2를 보면, 본 발명에 따른 신호전송회로는 고주파신호와 직류전원이 결합된 신호를 전송하는 1개의 케이블과 상기 케이블의 양단에 접속하여 신호를 결합하고 분리하는 신호결합분리수단을 포함하는 복합신호전송회로에 있어서, 상기 신호결합분리수단은 각각의 주파수대역을 통과시키는 대역통과필터(BPF1-BPEN)와, 상기 대역통과필터(BPF1-BPEN)와 일 대 일로 연결되고 다른 고주파신호단과 분리도(Isolation)를 유지하기 위한 고주파 분리수단(IM1-IMN)과, 상기 고주파 분리수단(IM1-IMN)의 전단에서 직류전원이 고주파신호단(N1-NN)으로 유입되는 것을 차단하는 직류전원 유입방지수단(11)과, 직류전원 유입방지수단(11)의 전단에서 직류전원단(ND)으로 고주파신호가 유입하는 것을 방지하는 고주파 유입방지수단(12)을 포함하는 멀티플렉서인 것을 특징으로 한다.2 is a block diagram of a multiplexer according to the present invention. 2, a signal transmission circuit according to the present invention includes a single cable for transmitting a signal combined with a high frequency signal and a direct current power source, and a signal coupling separating means for coupling and separating signals by connecting to both ends of the cable. In the signal transmission circuit, the signal coupling separation means is connected to the band pass filter (BPF1-BPEN) and the band pass filter (BPF1-BPEN) for passing each frequency band in a one-to-one manner and separated from other high frequency signal stages. High frequency separation means IM1-IMN for maintaining isolation and DC power inflow prevention for blocking DC power from entering the high frequency signal terminals N1-NN at the front end of the high frequency separation means IM1-IMN. It is characterized in that it is a multiplexer comprising a means 11 and a high frequency inflow prevention means 12 for preventing the high frequency signal from flowing into the DC power supply terminal ND at the front end of the DC power inflow prevention means 11.

도2의 구성에 따른 복합신호전송회로에서의 고주파신호와 직류전원의 결합 및 분리, 케이블을 통한 결합된 신호의 전송은 종래의 바이어스 티에 의한 신호전송회로에서와 동일하나, 본 발명에서는 고주파유입방지수단(12) 및 직류전원 유입방지수단(11)을 고주파 분리수단(IM1-IMN)의 전단에 구성함으로써 직류전원은 직류전원단(ND)사이에서만 전송되고, 직류전원유입방지수단(11)과 고주파신호(N1-NN)사이에 고주파 분리수단(IM1-IMN) 및 대역통과필터(BPF1-BPFN)를 구성함으로써 동일한 주파수의 고주파신호단(N1-NN)사이에서 신호의 전송이 가능하다.In the composite signal transmission circuit of FIG. 2, the combination and separation of the high frequency signal and the DC power supply and the transmission of the combined signal through the cable are the same as those of the conventional signal transmission circuit using a bias tee. By configuring the means 12 and the DC power inflow preventing means 11 at the front end of the high frequency separation means IM1-IMN, the DC power is transmitted only between the DC power supply terminals ND, and the DC power inflow preventing means 11 By constructing the high frequency separation means IM1-IMN and the band pass filter BPF1-BPFN between the high frequency signals N1-NN, the signal can be transmitted between the high frequency signal terminals N1-NN of the same frequency.

도3은 본 발명의 실시예에 따른 멀티플렉서의 구성도이다. 도3에 도시한 멀티플렉서는 3Mhz 주파수단, 10Mhz 주파수단 및 무선주파수단 및 직류전원단을 포함하고, 고주파 신호단의 대역통과필터는 각각 3Mhz 대역통가필터, 10Mhz 대역통과필터이고, 온도 변화에 따른 필터의 특성변화를 보상할 수 있도록 대역통과필터의 대역을 설정하는 것이 바람직하다.3 is a block diagram of a multiplexer according to an embodiment of the present invention. The multiplexer shown in FIG. 3 includes a 3Mhz frequency stage, a 10Mhz frequency stage, a radio frequency stage, and a DC power stage, and the bandpass filters of the high frequency signal stages are 3Mhz bandpass filters and 10Mhz bandpass filters, respectively, according to temperature changes. It is desirable to set the band of the bandpass filter to compensate for the change in the characteristics of the filter.

직류전원 유입방지수단은 커퍼시터(C21)로 구현하고 있다.DC power supply preventing means is implemented by a capacitor (C21).

고주파 유입방지수단은 커패시터(C11, C12) 및 인덕턴스(L11, L12)로, 고주파 분리수단은 커패시터(C31, C32) 및 인덕턴스(L31, L32)로 구현하고 있으며, 각 고주파신호 단자간의 분리도는 30dB이상으로 되도록 회로정수를 정한다.The high frequency inflow prevention means are implemented with capacitors C11 and C12 and inductances L11 and L12, and the high frequency separation means are capacitors C31 and C32 and inductances L31 and L32. Determine the circuit constant so that

본 실시예의 무선주파수단에는 별도의 대역통과필터 및 고주파분리수단을 구성할 필요가 없다.The radio frequency stage of the present embodiment does not need to configure separate band pass filters and high frequency separation means.

본 발명은 복합신호전송회로의 직류전원단에 고주파유입방지수단을 구성하고, 고주파신호단 전단에 직류전원유입방지수단, 고주파 분리수단 및 대역통과필터를 구성함으로써 다수개의 고주파 신호를 결합하여 전송할 수 있고, 회로정수를 적절히 선택함으로써 보다 큰 직류전력을 전달할 수 있다.According to the present invention, a high frequency inflow prevention means is constructed at a DC power supply terminal of a complex signal transmission circuit, and a DC power inflow prevention means, a high frequency separation means, and a band pass filter are configured at the front end of the high frequency signal. In addition, a larger DC power can be transmitted by appropriately selecting a circuit constant.

Claims (2)

고주파신호와 직류전원이 결합된 신호를 전송하는 1개의 케이블과 상기 케이블의 양단에 접속하여 신호를 결합하고 분리하는 신호결합분리수단을 포함하는 복합신호전송회로에 있어서, 상기 신호결합분리수단은 각각의 주파수대역을 통과시키는 대역통과필터(BPF1-BPFN)와, 상기 대역통과필터(BPF1-BPFN)와 일 대 일로 연결되고 다른 고주파신호단과 분리도(Isolation)를 유지하기 위한 고주파 분리수단(IM1-IMN)과, 상기 고주파 분리수단(IM1-IMN)의 전단에서 직류전원이 고주파신호(N1-NN)으로 유입되는 것을 차단하는 직류전원 유입방지수단(11)과, 직류전원 유입방지수단(11)의 전단으로 직류전원단(ND)으로 고주파신호가 유입되는 것을 방지하는 고주파 유입방지수단(12)을 포함하는 멀티플렉서인 것을 특징으로 하는 복합신호전송회로.In the composite signal transmission circuit comprising one cable for transmitting a signal coupled to a high frequency signal and a direct current power source and signal coupling separation means for coupling and separating signals by connecting to both ends of the cable, the signal coupling separation means each A band pass filter (BPF1-BPFN) for passing a frequency band of the signal, and a high frequency separation means (IM1-) connected to the band pass filter (BPF1-BPFN) in a one-to-one manner and maintaining isolation with other high frequency signal terminals. IMN, a DC power inflow prevention means 11 for blocking DC power from flowing into the high frequency signals N1-NN at the front end of the high frequency separation means IM1-IMN, and a DC power inflow prevention means 11. And a multiplexer comprising a high frequency inflow preventing means (12) for preventing the high frequency signal from flowing into the DC power supply terminal (ND) at the front end. 제1항에 있어서, 고주파 유입방지수단(12) 및 고주파 분리수단(IM1-IMN)은 커퍼시터 및 인덕턴스로 구현되는 것을 특징으로 하는 복합신호 전송회로.The complex signal transmission circuit according to claim 1, wherein the high frequency inflow preventing means (12) and the high frequency separating means (IM1-IMN) are implemented with a capacitor and an inductance.
KR1019960042928A 1996-09-30 1996-09-30 Composite signal transmission circuit use of multiplex KR100211735B1 (en)

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KR19980023440A true KR19980023440A (en) 1998-07-06
KR100211735B1 KR100211735B1 (en) 1999-08-02

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