CN203466789U

CN203466789U - Through-flow coupler

Info

Publication number: CN203466789U
Application number: CN201320581395.XU
Authority: CN
Inventors: 孙祥生
Original assignee: GUANGDONG ALTRATEK COMMUNICATION TECHNOLOGY Co Ltd
Current assignee: GUANGDONG ALTRATEK COMMUNICATION TECHNOLOGY Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2014-03-05
Anticipated expiration: 2023-09-13

Abstract

Provided in the utility model is a through-flow coupler capable of realizing direct current flowing. A feeder is used for direct current connection and connection to an indoor distribution system is realized; and direct current outputting is realized at each joint of the coupler. The coupling circuit is a four-port network; and the four ports include an input terminal, an output terminal, an isolation terminal and a coupling terminal. The input terminal, the output terminal and the coupling terminal are respectively connected to an input port, an output port and a coupling port, wherein the ports are arranged at the side of a box body. The output terminal and the coupling terminal are respectively provided with two segments of quarter-wave copper bars; a coil (L) is arranged between the two segments of quarter-wave copper bars; and capacitors (C5) and (C6) are respectively arranged at the two ends of the coil (L), wherein the capacitors (C5) and (C6) are respectively grounded. A blocking capacitor (C4) is arranged between the coupling terminal and the isolation terminal; and a blocking capacitor (C3) is arranged between the isolation terminal and a load (R2) that is grounded. Besides, the coupling circuit also includes an equivalent coupling capacitor (C2) for conduction transmission and coupling.

Description

A kind of through-flow coupler

Technical field

The utility model relates to a kind of coupler, is specifically applied to the indoor distributed system of TD-LTE frequency conversion system.

Background technology

Mobile data traffic growth is in recent years rapid, need to build the demand that TD-LTE network meets mobile subscriber.Because the operating frequency of TD-LTE is very high, about 2.6GHz, the loss of the signal of TD-LTE in feeder line is large, will be at the indoor two-way indoor distributed system of again spreading, difficulty of construction is large, and property is coordinated difficult, so TD-LTE frequency conversion system is by carrying out frequency conversion to a passage of TD-LTE MIMO binary channels RRU, realize transmitting two paths of signals in the antenna-feedback system of Yi road, reach the object of TD-LTE stream transmission.This system has greatly reduced Project Realization difficulty and quantities that mimo system is divided in TD-LTE chamber, is conducive to improve the performance of the TD-LTE of China Mobile chamber subsystem.This system need to be carried out converter technique at near-end and far-end, but far-end antenna is inconvenient to power, therefore need to provide direct current from near-end, direct current can transmit in feeder line, coupler and the power splitter of indoor distributed system, thereby realizes the power supply of far-end active antenna.

Utility model content

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, provide a kind of can be by the cavity coupler of direct current.By loop, add direct current, in access indoor distributed system, there is direct current output each joint of coupler.

The utility model solves the technical scheme that its technical problem adopts: a kind of through-flow coupler, and its coupling circuit is four port networks, four ports are respectively input, output, isolation end, coupled end; Input, output and coupled end are connected to respectively the input port that box body side arranges, output port and coupling port;

Output and coupled end respectively add one section of quarter-wave copper rod, between above-mentioned two sections of quarter-wave copper rods, add a coil L, and coil L two ends respectively add a capacitor C 5, C6, and capacitor C 5, C6 be ground connection respectively;

Between coupled end and isolation end, add capacitance C4, between isolation end and load R2, add capacitance C3, load R2 ground connection;

Coupling circuit also comprises the equivalent coupled capacitor C 2 of transmission conductor and coupling conductors.

Further: above-mentioned input port, output port and coupling port are N connector or DIN type joint.

Preferably: above-mentioned load R2 resistance value is 50 Ω.

The utility model compared with prior art has the following advantages:

The utility model is through-flow coupler, adds direct current by loop at machine room, the input port of coupler, and delivery outlet, coupling aperture has direct current output, and feeder line, the power splitter of indoor distributed system have direct current, direct current are provided can to the equipment of far-end.

Accompanying drawing explanation

Fig. 1 is external structure schematic diagram of the present utility model;

Fig. 2 is the circuit theory diagrams of common housing coupler;

Fig. 3 is circuit theory diagrams of the present utility model.

Description of reference numerals:

1-input, 2-output, 3-isolation end, 4-coupled end, 5-quarter-wave copper rod, 6-input port, 7-output port, 8-coupling port, 9-box body.

Embodiment

Below in conjunction with drawings and Examples, the utility model embodiment is described:

As shown in Figure 1, Figure 2 and Figure 3, a kind of through-flow coupler of the utility model, the schematic diagram that Fig. 3 is through-flow coupler, it is four port networks, four ports are respectively input 1, output 2, isolation end 3, coupled end 4.Wherein, input 1, output 2 and coupled end 4 are connected to respectively the input port 6 that box body 9 sides arrange, output port 7, and coupling port 8.The schematic diagram of itself and common housing coupler is basically identical, just at output 2 and coupled end 4, respectively adds one section of quarter-wave copper rod 5, and C5, C6 can make quarter-wave copper rod be equivalent to short circuit, and high frequency useful signal cannot pass through.Add capacitance C3, C4, in order to avoid direct current is carried in the upper heating of 50 Ω load R2.Coupling capacitance C2 is the equivalent capacity of transmission conductor, coupling conductors, and the size of the through-flow coupler degree of coupling can be by regulating the spacing of transmission conductor, coupling conductors to realize.

6 input ports that are through-flow coupler in Fig. 1,7 output ports that are through-flow coupler, 8 coupling port that are through-flow coupler, 9 box bodys that are through-flow coupler.According to actual needs, each port can be N connector or DIN type joint.When practical operation, whether the center conductor that will check through-flow coupler before access shorted to earth, and when normal, center conductor is opened a way over the ground.

5 of above-mentioned two sections of quarter-wave copper rods add a coil L, and coil L two ends respectively add an electric capacity.Because these two electric capacity (C5, C6) are to high frequency short circuit, quarter-wave short-circuit line is very large to the resistance of operating frequency, be equivalent to open circuit, so direct current can pass through.Owing to considering that load R2 can not directly add direct current, therefore before load, need to add electric capacity C3.According to the operating frequency of coupler and coupling aperture size of current, calculate inductance value, coil turn number and the thickness of coil wire diameter, the input of cavity coupler, output, coupled end can be led to direct current like this.

By reference to the accompanying drawings the utility model preferred implementation is explained in detail above, but the utility model is not limited to above-mentioned execution mode, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make a variety of changes.

Do not depart from design of the present utility model and scope and can make many other changes and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.

Claims

1. a through-flow coupler, its coupling circuit is four port networks, four ports are respectively input (1), output (2), isolation end (3), coupled end (4); It is characterized in that: input (1), output (2) and coupled end (4) are connected to respectively the input port (6) that box body (9) side arranges, output port (7) and coupling port (8);

Output (2) and coupled end (4) respectively add one section of quarter-wave copper rod (5), between above-mentioned two sections of quarter-wave copper rods (5), add a coil (L), coil (L) two ends respectively add an electric capacity (C5, C6), and electric capacity (C5, C6) is ground connection respectively;

Between coupled end (4) and isolation end (3), add capacitance (C4), between isolation end (3) and load (R2), add capacitance (C3), load (R2) ground connection;

Coupling circuit also comprises the equivalent coupled electric capacity (C2) of transmission conductor and coupling conductors.

2. a kind of through-flow coupler as claimed in claim 1, is characterized in that: described input port (6), output port (7) and coupling port (8) are N connector or DIN type joint.

3. a kind of through-flow coupler as claimed in claim 1 or 2, is characterized in that: described load (R2) resistance value is 50 Ω.