JP3192343U - Distributor with MoCA barrier function - Google Patents

Abstract

Disclosed is a distributor having a MoCA blocking function that can prevent mutual interference between a frequency signal of 1,125 MHz to 1,675 MHz and a frequency signal of 5 MHz to 1,002 MHz of a cable television.
A distributor having a MoCA blocking function has one end connected to a distributor input terminal, inputs a frequency signal, and uses a low-pass filtering unit 10 for performing low-pass filtering on the frequency signal. A first class divider 30 connected to the output terminal of the low-pass filtering unit 10 and outputting the frequency signal after being attenuated by a first numerical value; and an input terminal serving as the first class distribution A second class divider 40 connected to the output of the device 30 and used to output the frequency signal to at least one client connector 48 after a second numerical attenuation.
[Selection] Figure 2

Description

  The present invention relates to a distributor, and more particularly to a distributor having a MoCA blocking function.

The current indoor cable TV system uses a cable modem or a set top box system to provide a cable TV with a tap, a splitter, or a house amplifier. Connect to cable and download video signal (with a frequency of about 54MHz to 1000MHz) or transmit data (upstream with a frequency of about 5MHz to 42MHz) into the host computer of the cable television system .

  The Coaxial Cable Multimedia Alliance (MoCA) protocol is an emerging protocol that allows transmission of multimedia video or audio over the current cable television coaxial cable, and its communication frequency band is: 1,125 MHz to 1,675 MHz.

  However, the design of the current distributor structure uses a frequency signal of 5MHz to 1,002MHz, and when used in a MoCA system, the frequency signal of 1,125MHz to 1,675MHz between clients is in the main branch line input port. There is a possibility that the frequency signals of the two frequency bands may interfere with each other, and further, it affects the quality of the cable television and belongs to the shortage.

  Referring to FIG. 1, it is an explanatory view of insertion loss between the main branch line input port of the distributor and the client connector. As shown in the figure, between the branch line input port and client connector of the conventional distributor, the insertion loss at ▽ 2 is -7.30dB, the insertion loss at ▽ 3 is -7.62dB, and the insertion of ▽ 4 The loss is -17.85dB. The isolation between the two is not good, and the purpose of filtering out frequency signals of 1,125 MHz to 1,675 MHz cannot be achieved.

  In contrast to the above-mentioned defects of the conventional distributor, the present invention provides a distributor having a MoCA blocking function and improves the defect.

Japanese Patent Publication No. 2012-525764

  An object of the present invention is to have a low-pass filtering unit, and efficiently filter the frequency signal of 1,125 MHz to 1,675 MHz, and the frequency signal of 1,125 MHz to 1,675 MHz and the frequency signal of 5 MHz to 1,002 MHz of cable television. It is an object of the present invention to provide a distributor having a MoCA blocking function that can prevent mutual interference from occurring.

  In order to achieve the above object, the distributor having the MoCA blocking function of the present application has one end connected to the distributor input terminal, used to input a frequency signal, and to perform low-pass filtering on the frequency signal. A low-pass filtering unit, a first class distributor used for outputting the frequency signal after the input end is connected to the output end of the low-pass filtering unit and the frequency signal is attenuated by a first numerical value, and the input end is And at least one secondary distributor used to connect to the output of the primary distributor and output the frequency signal to at least one client connector after a second numerical attenuation.

  By implementing the distributor with the MoCA blocking function of the present application, it has a low-pass filtering unit, and efficiently filters the frequency signal of 1,125 MHz to 1,675 MHz, and the frequency signal of 1,125 MHz to 1,675 MHz It is possible to prevent the frequency signal of 5 MHz to 1,002 MHz of the cable television from causing mutual interference.

It is insertion loss explanatory drawing between the branch line input port and client connector of the conventional distributor. It is block explanatory drawing of the divider | distributor which has the MoCA blocking function of the suitable Example of this application. It is block explanatory drawing of the divider | distributor which has the MoCA blocking function of the suitable Example of this application. It is circuit explanatory drawing of the 1st class divider | distributor of this application. It is insertion loss explanatory drawing between the branch line input port of this application, and a client connector. FIG. 5 is an explanatory view of a distributor according to a preferred embodiment of the present application further including a printed circuit board. It is explanatory drawing in which the divider | distributor of the preferable Example of this application further has a shell.

  In order to make the structure, features and purpose of the present invention more comprehensible, the following detailed description is made with reference to the drawings and preferred embodiments.

  2 to 4 together, FIG. 2 shows a block diagram of a distributor having a MoCA blocking function of a preferred embodiment of the present application, and FIG. 3 is a circuit diagram of a low-pass filtering unit of the present application. FIG. 4 is a circuit explanatory diagram of the first class distributor of the present application.

  As shown in the figure, the distributor having the MoCA blocking function of the present invention includes a low-pass filtering unit 10, a first-class distributor 30, and at least one second-class distributor 40.

  One end of the low-pass filtering unit 10 is connected to the branch line input port 50, used to input a frequency signal and perform low-pass filtering on the frequency signal, of which the branch line input port 50 Is, but not limited to, a cable television coaxial cable connector, for example, used to input a radio frequency (RF) signal into a cable (not shown), the frequency of which is limited to this. For example, it is 5 MHz to 1,002 MHz. Among them, the low-pass filtering unit 10 further includes at least one low-pass filter 11 whose pass frequency band is not limited to this, for example, 5 MHz to 1,002 MHz, The blocking frequency band is not limited to this, and is, for example, 1,125 MHz to 1,675 MHz.

  The input terminal of the first class distributor 30 is connected to the output terminal of the low-pass filtering unit 10 and is used for outputting the frequency signal after the first numerical attenuation. Of these, the first numerical value is, for example, 3.5 dB, although not limited thereto.

  The input terminal of the second class distributor 40 is connected to the output terminal of the first class distributor 30 and is used to output the frequency signal to at least one client connector 48 after being attenuated by a second numerical value. Of these, the second numerical value is, for example, 3.5 dB, although not limited thereto. Among them, the frequency of the frequency signal output by the client connector 48 is 5 MHz to 1,002 MHz and 1,125 MHz to 1,675 MHz, of which 5 MHz to 1,002 MHz can be provided for cable TV signal upload and download, Communication can be performed between two clients using the Coaxial Cable Multimedia Federation (MoCA) protocol.

  Further, the distributor having the MoCA blocking function of the present application further includes a low-pass filtering unit 10 and is used to output the frequency signal to the input terminal of the first-class distributor 30.

  As shown in FIG. 3, the low-pass filtering unit 10 of the present application includes a multi-stage low-pass filter 11 connected in series, and each low-pass filter 11 includes at least one inductor 111, a first capacitor 112, and the like. The second capacitor 113 is connected in parallel and grounded. In the present embodiment, the case where the four-stage low-pass filter 11 is formed in series will be described as an example, but the present invention is not limited to this.

  As shown in FIG. 4, the first class distributor 30 of the present application is composed of two coils 31, 32, two inductors 33, 34, a capacitor 35, and a resistor 36, of which one end of the coil 31 is low. The other end of the coil 31 is connected to the ground. One end of the coil 32 is connected to one end of the inductor 33, and the other end of the coil 32 is connected to one end of the inductor 34. One end of the inductor capacitor 35 is connected to the middle of the coil 312 and the coil 323, and the other end of the inductor capacitor 35 is connected to the ground. One end of the resistor 36 is connected to the other end of the inductor 33, the other end of the resistor 36 is connected to the other end of the inductor 34, and both ends of the resistor 36 are respectively connected to the second class. Connect to the input of distributor 40. Of these, the secondary distributor 40 has a structure similar to that of the primary distributor 30, and is not repeated here.

  With reference to FIG. 5, it is explanatory drawing of the insertion loss between the branch line input port and client connector of the branching device of this application. As shown in the figure, between the branch line input port and the client connector of this branching device, the insertion loss at ▽ 2 is -8.50dB, the insertion loss at ▽ 3 is -49.09dB, ▽ 4 The insertion loss at -58.61dB. Therefore, the distributor of the present application has a better isolation (40 to 50 dB) and achieves the purpose of filtering out frequency signals of 1,125 MHz to 1,675 MHz by the low-pass filtering unit 10. it can.

  The operating principle of the distributor having the MoCA blocking function according to the present application is, for example, that, during operation, a 5 MHz to 1,002 MHz wired TV frequency signal input from the branch line input port 50 is filtered by the low-pass filtering unit 10. Thereafter, it can be input to the input terminal of the first class distributor 30. The frequency signal of 5 MHz to 1,002 MHz can have an intensity of about 35 dB after further attenuation of the first class distributor 30 and the second class distributor 40 (between the branch line input port 50 and the client connector 48). ). When communication is performed between two clients using the MoCA protocol, the frequency signal of 1,125 MHz to 1,675 MHz is output to the client connector 48 via the connection of the first class distributor 30 and the second class distributor 40. The After passing through the filtering of the low-pass filtering unit 10, the frequency signal of 1,125 MHz to 1,675 MHz is blocked and does not enter the branch line input port 50, and thus the frequency of 1,125 MHz to 1,675 MHz. The frequency signal can be efficiently filtered, and the frequency signal of 1,125 MHz to 1,675 MHz and the frequency signal of 5 MHz to 1,002 MHz of the cable television can be prevented from generating mutual interference.

  As shown in FIG. 6, the distributor having the MoCA blocking function of the present application further includes a printed circuit board 80, the low-pass filtering unit 10, the first-class branching device 30, and at least one second-class distributor. A member such as 40 is mounted.

  As shown in FIG. 7, the distributor having the MoCA blocking function of the present application further includes a shell 90 and accommodates members such as the printed circuit board 80, the branch line input port 50, and the client connector 48. To do. The shell 90 is not limited to this, and is formed of, for example, a metal material. Therefore, the distributor having the MoCA blocking function of the present application has an inventive step as compared with the conventional branching device.

  As described above, the implementation of the distributor having the MoCA blocking function of the present application has a low-pass filtering unit, which efficiently filters the frequency signal of 1,125 MHz to 1,675 MHz, and the 1,125 MHz to 1,675 The frequency signal of MHz and the frequency signal of 5MHz to 1,002MHz of cable television can be prevented from generating mutual interference, etc. Therefore, the book has an inventive step compared with the conventional distributor. Have.

  The detailed description of the present invention according to the above embodiments does not limit the scope of the present invention. Even if a person familiar with the present technology makes changes or adjustments within the scope of the present invention, the important significance of the present invention is not lost and is included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Low-pass filtering unit 11 Low-pass filter 111 Inductor 112 1st capacitor | condenser 113 2nd capacitor | condenser 30 1st class distributor 31, 32 Coil 33, 34 Inductor 35 Capacitor 36 Resistor 40 2nd class distributor 48 Client connector 50 Branch line input port 80 Printed circuit board 90 Shell

Claims (7)

One end of the low-pass filtering unit connected to the branch line input port, used for inputting a frequency signal and performing low-pass filtering on the frequency signal;
A first class distributor connected to an output terminal of the low-pass filtering unit and used to output the frequency signal after being attenuated by a first numerical value;
At least one secondary distributor used to connect its input to the output of the primary distributor and output the frequency signal to at least one client connector after a second numerical attenuation;
A distributor having a MoCA blocking function. The distributor having a MoCA blocking function according to claim 1, wherein the frequency signal is 5 MHz to 1,002 MHz. The low-pass filtering unit further includes at least one low-pass filter whose pass frequency band is 5 MHz to 1,002 MHz and whose blocking frequency band is 1,125 MHz to 1,675 MHz. A distributor having the described MoCA barrier function. The low-pass filtering unit includes a multi-stage low-pass filter connected in series, and each low-pass filter includes at least one inductor, a first capacitor in parallel and a grounded second capacitor. Item 4. A distributor having a MoCA barrier function according to Item 3. 2. The distributor having a MoCA blocking function according to claim 1, wherein the first class distributor includes two coils, two inductors, a capacitor, and a resistor, and the first numerical value is 3.5 dB. 2. The distributor having a MoCA blocking function according to claim 1, wherein the second class distributor includes two coils, two inductors, a capacitor, and a resistor, and the second numerical value is 3.5 dB.   The frequency of the frequency signal output by the client connector is 5 MHz to 1,002 MHz and 1,125 MHz to 1,675 MHz, of which 5 MHz to 1,002 MHz can be used for uploading and downloading wired TV signals, and 1,125 MHz to 1,675 The distributor having a MoCA blocking function according to claim 1, wherein the MHz can be communicated by a multimedia cable (MoCA) protocol between two clients via a coaxial cable.

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