CN2874793Y

CN2874793Y - Radio frequency passive coupling inter communication device

Info

Publication number: CN2874793Y
Application number: CN 200520099587
Authority: CN
Inventors: 陈耕; 邬慧明; 杨兴; 于永锋
Original assignee: WUHAN SHANGXIN TECHNOLOGY Co Ltd
Current assignee: WUHAN SHANGXIN TECHNOLOGY Co Ltd
Priority date: 2005-12-22
Filing date: 2005-12-22
Publication date: 2007-02-28
Anticipated expiration: 2015-12-22

Abstract

The utility model provides an RF passive coupling intercommunicated device, which comprises a filtering circuit and an electromagnetic coupling circuit. The input terminals of the filtering circuit can be treated as input terminals of a signal source. The output terminals of the filtering circuit are connected with primary coil input terminals of an electromagnetic coupling circuit. Leads drawn out of the primary coil are treated as output terminals of the primary coil. Leads drawn out of the secondary coil are treated as input terminals of the secondary coil. Leads drawn out of the primary coil are connected with leads drawn out of the secondary coil. Both ends of the secondary coil of the coupling circuit are treated as intercommunicated connection terminals. Magnetic cores are arranged in the primary coil and the secondary coil of the coupling circuit. When leads drawn out of the secondary coil of the coupling circuit separate the secondary coil into two segments in a turning ratio of 1:1, that is to say the coupling is separated by half, number of the intercommunicated connection terminals should be two. When any intercommunicated connection terminal of the coupling circuit is connected with the primary coil input terminal of the secondary coupling circuit, three intercommunicated connection terminals can be achieved. The utility model can connect all rooms in a house into an internally-intercommunicated transmission network, so that resources can be shared.

Description

Radio frequency passive coupling inter communication device

Technical field

The utility model relates to a kind of radio frequency passive coupling inter communication device, is used for signal transmission and distribution technique.Belong to the signal filtering technology, transmission line theory, distributor principle field.

Background technology

Present video household electrical appliances (as VCD, DVD), increasing various smart card video receivers (as IPTV, STB), diverse network all enters family, as telephone network, the Internet, optical fiber, cable television network.For more abundant these family's electric resources, the Internet resources of utilizing easily, each room of family need be unified into internal network and share these resources.But, also there is not a kind of connection distributor now, indoor coaxial cable can be connected into the intercommunication transmission network, come to realize effectively easily resource-sharing.

Summary of the invention

The purpose of this utility model is a kind of radio frequency passive coupling inter communication device of design, the cable tv coax in each room of existing family is connected into the intercommunication transmission network of one family inside by this device, be beneficial to the transmission in order in the network of portion within the family of TV signal, vision signal and other signal, and the signal of internal transmission will be limited in by this device can only internal transmission, can other homogeneous network that be communicated with not exerted an influence.

The technical solution of the utility model: radio frequency passive coupling inter communication device of the present utility model comprises filter circuit and coupling circuit, coupling circuit is the electromagnetic coupled circuit, the input of filter circuit is as the signal source input, the output of filter circuit is connected with the primary coil input of electromagnetic coupled circuit, extracts the output of lead-in wire as primary coil in the middle of the primary coil out.The lead-in wire of extracting out in the middle of the secondary coil is as the input of secondary coil.Extracting lead-in wire in the middle of the primary coil out is connected with the lead-in wire of extraction in the middle of the secondary coil; The two ends of the secondary coil of coupling circuit are as being connected end.

Described radio frequency passive coupling inter communication device has magnetic core in the primary coil of coupling circuit, the secondary coil.

Described radio frequency passive coupling inter communication device, extracting lead-in wire in the middle of the coupling circuit secondary coil out, secondary coil is divided into two sections turn ratio is the coupling of promptly halving in 1: 1, the terminal number amount that is connected is two.

Described radio frequency passive coupling inter communication device, arbitrary end that is connected of coupling circuit is connected to the primary coil input of second level coupling circuit, can obtain three ends that are connected.

Advantage of the present utility model: the utility model can connect into the cable tv coax that has each room of family now the intercommunication transmission network of one family inside by this device, be beneficial to the transmission in order in the network of portion within the family of TV signal, vision signal and other signal, realize resource-sharing effectively easily, and the signal of internal transmission will be limited in by this device can only internal transmission, can other homogeneous network that be communicated with not exerted an influence.

Description of drawings

Fig. 1: be the most basic logic diagram of the utility model.

Fig. 2: be the most basic circuit diagram of the utility model.

Fig. 3: be one of most preferred embodiment of the present utility model circuit diagram.

Fig. 4: two circuit diagrams that are most preferred embodiment of the present utility model.

Fig. 5: the characteristic curve that is multistage combination low-pass filter circuit.

Fig. 6: be that typical case of the present utility model uses connection layout.

Embodiment

Fig. 1 is the most basic logic diagram of the utility model: the utility model comprises filter circuit 1 and coupling circuit 2.The input A of filter circuit is as signal source N1 input, and the output of filter circuit is connected with the input B of electromagnetic coupled circuit 2, and the C of coupling circuit 2, D end is as being connected end.

As signal N1 during from the input of the input A point of filter circuit, select suitable parameter to allow signal N1 to pass through to the input B point of coupling circuit from filter circuit, again through overcoupled circuits, hold C, D point can obtain corresponding signal N1 being connected.But when signal N2 from coupling circuit be connected end D point oppositely during input, signal N2 holds the B point by coupling circuit to being connected, owing to the effect of filter circuit makes signal N2 filtered when the wave circuit after filtration.Signal N2 can not pass to the input A point of filter circuit.The signal that promptly transmits in filter circuit is selectable one-way transmission, guarantees not disturb mutually between the network with other similar UNICOM, and is separate.When signal N2 holds the input of D point from being connected, because the coupling of secondary coil can obtain signal N2 at another end C point that is connected.Realize the intercommunication of 2 of C, D.

Fig. 2 is the most basic circuit diagram of the utility model:

As Fig. 2 is the most basic circuit diagram of the utility model logic diagram: form LC filter circuit 1 by inductance L and capacitor C.The output of filter circuit is connected with the primary coil input of electromagnetic coupled circuit 2, extracts the output of lead-in wire as primary coil in the middle of the primary coil of filter circuit out.The lead-in wire of extracting out in the middle of the secondary coil is as the input of secondary coil.Extract lead-in wire in the middle of the primary coil out and be connected with the lead-in wire of extraction in the middle of the secondary coil, 2-1 is a connecting line.The two ends of the secondary coil of coupling circuit as be connected end when signal N1 when the input A point of filter circuit is imported, select suitable parameter to allow signal N1 to pass through to the input B point of coupling circuit from filter circuit, through overcoupled circuits 2, end C, D point can obtain corresponding signal N1 being connected again.But when signal N2 from coupling circuit be connected end D point oppositely during input, signal N2 by coupling circuit to input B point, owing to the effect of filter circuit makes signal N2 filtered when the wave circuit after filtration.Signal N2 can not pass to the input A point of filter circuit.The signal that promptly transmits in filter circuit is selectable one-way transmission, guarantees not disturb mutually between the network with other similar UNICOM, and is separate.When signal N2 holds the input of D point from being connected, because the coupling of secondary coil can obtain signal N2 at another end C point that is connected.Realize the intercommunication of 2 of C, D.In like manner, when C point when input of signal N3 from the end that is connected, another is connected and holds D point can obtain signal N3.

Filter can select different technical parameters to make the filter of difference in functionality as required.As high pass filter, low pass filter, band pass filter, band stop filter etc.The frequency characteristic of filter is to allow to pass through as the signal of input, will fall as the filtering signals of intercommunication, does not allow to pass through in filter as the signal of intercommunication.

Fig. 3 is one of most preferred embodiment of the present utility model circuit diagram:

Capacitor C 1～C12, inductance L 1～L12 constitute a multistage LC combination low-pass filter circuit; Lb is the primary coil of coupling circuit, and capacitor C b is that the other end with the primary coil of coupling circuit suspends over the ground, and the direct current of be connected 2 of end C, D is passed through.LC, LD are the secondary coils of coupling circuit.2-1 is a connecting line of extracting the lead-in wire of extracting out in the middle of lead-in wire and the secondary coil in the middle of the primary coil out.Lb, Cb, C*, LC, LD constitute a bisection coupling circuit.Select suitable parameter to make the input signal N1 of a certain frequency of filter circuit input A point can arrive the input B point of coupling circuit by filter circuit, signal N1 is through overcoupled circuits, and end C, D obtain signal N1 simultaneously being connected.When another frequency signal N2 from being connected during the input of end D point of coupling circuit, be connected at another of coupling circuit and hold C point can obtain the N2 signal.Simultaneously also can obtain the N2 signal at B point through coupling circuit, but owing to filter circuit has been selected suitable parameter, filtering sum of series filtering mode and made signal N2 filtered when the wave circuit after filtration.Signal N2 can not pass to the input A point of filter circuit.Guarantee not disturb mutually between the network with other similar UNICOM, separate.The characteristic of multistage combination low-pass filter circuit can be used the curve representation of Fig. 5.

The output impedance of coupling circuit primary coil and the ratio of coupling circuit primary coil input impedance are and square being directly proportional of the ratio of the number of turn of the output of primary coil and the number of turn of primary coil input.

Fig. 4 is two circuit diagrams of most preferred embodiment of the present utility model:

It is identical with embodiment 1 that capacitor C 1～C12, inductance L 1～L12 constitute a multistage LC combination low-pass filter circuit.Lb is the primary coil of coupling circuit, and capacitor C b is that the other end with the primary coil of coupling circuit suspends over the ground, and the direct current of be connected 2 of end C, D is passed through.LC, LD are the secondary coils of coupling circuit.2-1 is a connecting line of extracting the lead-in wire of extracting out in the middle of lead-in wire and the secondary coil in the middle of the primary coil out.Lb, Cb, C*, LC, LD constitute a bisection coupling circuit.Connect a same coupling circuit again as the end that is connected at coupling circuit, then three of coupling circuit be connected end D, E, F can the intercommunication signal.In like manner, four ends that are connected can be arranged.

Fig. 6 is that typical case of the present utility model uses connection layout:

5-1 is a radio frequency passive coupling inter communication device of the present utility model, and 5-2 is a radio-frequency modulator.Input A is as CATV signal source input, and be connected end D, E meet television receiver TV1, TV2, and the end F that is connected connects VCD, DVD by radio-frequency modulator 5-2.Should VCD, DVD video/audio signal be modulated into the RF signal with being one, be transferred to the television receiver of different location by the utility model with coaxial cable.Do not need rewiring at home, do not need the video household electrical appliances are shifted from one place to another.The CATV signal can be sent to TV1, TV2 and radio-frequency modulator 5-2 by input A; Radio-frequency modulator 5-2 is modulated into the RF signal with the video/audio signal of VCD, DVD and is sent to TV1, TV2.

Core of the present utility model is to utilize combining of filter circuit and electromagnetic coupled circuit dexterously, the cable tv coax in each room of existing family is connected into the intercommunication transmission network of one family inside, be beneficial to the transmission in order in the network of portion within the family of TV signal, vision signal and other signal, and the signal of internal transmission can be to external transmission.Therefore, everyly utilize the combining of filter circuit and electromagnetic coupled circuit to constitute radio frequency passive coupling inter communication device, all belong to protection range of the present utility model.

Claims

1. radio frequency passive coupling inter communication device, comprise filter circuit and coupling circuit, it is characterized in that: coupling circuit is the electromagnetic coupled circuit, the input of filter circuit is as the signal source input, the output of filter circuit is connected with the primary coil input of electromagnetic coupled circuit, extracts the output of lead-in wire as primary coil in the middle of the primary coil out.The lead-in wire of extracting out in the middle of the secondary coil is as the input of secondary coil.Extracting lead-in wire in the middle of the primary coil out is connected with the lead-in wire of extraction in the middle of the secondary coil; The two ends of the secondary coil of coupling circuit are as being connected end.

2. radio frequency passive coupling inter communication device according to claim 1 is characterized in that: in the primary coil of coupling circuit, the secondary coil magnetic core is arranged.

3. radio frequency passive coupling inter communication device according to claim 1 and 2 is characterized in that: extracting lead-in wire in the middle of the coupling circuit secondary coil out, secondary coil is divided into two sections turn ratio is the coupling of promptly halving in 1: 1, and the terminal number amount that is connected is two.

4. radio frequency passive coupling inter communication device according to claim 1 and 2 is characterized in that: arbitrary end that is connected of coupling circuit is connected to the primary coil input of second level coupling circuit, can obtain three ends that are connected.