CN211238459U

CN211238459U - POI merit divides combiner

Info

Publication number: CN211238459U
Application number: CN202020341518.2U
Authority: CN
Inventors: 罗也荣; 夏闽
Original assignee: Hunan Aude Information Technology Co ltd
Current assignee: Hunan Aude Information Technology Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-08-11
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a POI merit divides combiner belongs to the wireless communication technology field, including the casing and locates merit branch ware subtotal combiner part in the casing, the combiner part includes the PCB board that is equipped with the combiner circuit and locates signal input port and signal output port on this PCB board, the merit divides the ware part to include the PCB board that is equipped with the power branch circuit and locates a signal input port and at least two signal output ports on this PCB board; an isolation mounting plate is arranged between the PCB boards of the combiner part and the power divider part, a power supply is arranged between the signal output ports of the power divider part for isolation, and the combiner circuit and the power divider circuit are designed in a planar microstrip mode. The utility model discloses can realize that the radio frequency signal in two way or multichannel operating band closes the way when the transmission, receives the function of separation, and its is small, and the interference is few, and power height and loss are little.

Description

POI merit divides combiner

Technical Field

The utility model relates to a wireless communication technology field, specificly relate to a POI merit divides combiner.

Background

A Point Of Interface (POI) is widely used in the indoor communication coverage field Of large buildings such as subways, exhibition centers, exhibition halls, airports, and the like. As a common input and output platform of signals, the POI combines mobile signals of a plurality of operators and a plurality of communication modes through a frequency combiner and an electric bridge combiner and then introduces an antenna feeder distribution system, thereby greatly improving the construction speed of the network, reducing the cost of repeated construction and achieving the purposes of fully utilizing resources and saving investment.

To avoid interference, the POI is divided into an uplink platform and a downlink platform, which are respectively used for separately transmitting uplink and downlink signals. The POI is used as a bridge for connecting a wireless communication donor signal and a distributed coverage signal (leaky cable, antenna array, etc.), and has the main functions of respectively combining and splitting uplink and downlink radio frequency signals of each operator and filtering interference components among frequency bands. The main function of the POI uplink part is to transmit signals sent by mobile phones of different standards to the uplink POI through the collection of antennas and the transmission of feeders, and to transmit the signals of different frequency bands to base stations of different operators after being detected by the POI. The main function of the POI downlink part is to synthesize carrier signals of various operators and different frequency bands and then send the carrier signals to an antenna feeder distribution system in a coverage area.

At present, the conventional POI power splitting combiner has a large volume, interference exists between output ports, the power is low, and the insertion loss is large.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a POI merit divides combiner, its is small, disturbs fewly, and power is high and the loss is little.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a POI power dividing combiner comprises a shell, a power dividing combiner part and a combiner part, wherein the power dividing combiner part and the combiner part are arranged in the shell; the circuit combiner comprises a combiner part and a power divider part, wherein an isolation mounting plate is arranged between PCBs of the combiner part and the power divider part, a power supply is arranged between signal output ports of the power divider part for isolation, the combiner circuit and the power divider circuit are designed in a planar microstrip mode, for the combiner part, different frequency band isolation above 75dB is realized in a 4G frequency band and a mobile communication frequency band, and the insertion loss of an input port and an output port is controlled within 0.8 dB.

Further, the combiner circuit is used for outputting the radio station and the mobile communication frequency band, wherein the circuit for receiving the radio station adopts a connection form of parallel connection of four-stage LC filters, and the circuit for receiving the mobile communication frequency band signal adopts a connection form of parallel connection of two-stage LC filters. The passive device is adopted, so that the working is stable and basically free of noise.

Furthermore, the power dividing circuit is designed by adopting the principle of a Wilkinson power divider and is used for realizing power equal division of the received signals.

Further, the number of the signal output ports of the power divider portion is two, and when the signal powers from the two signal output ports are equal in amplitude, the signal input port of the power divider portion can be used as a signal output port of a satellite navigation frequency band.

Furthermore, the partial circuits of the power dividing circuit about the two signal output ports are symmetrically arranged, and an isolation resistor is arranged in the middle of the two symmetrical circuits. When one circuit has an open circuit or short circuit problem, the reflected power is absorbed by the isolation resistor, and the two output ports are balanced.

Furthermore, the power dividing circuit performs impedance matching by adopting a step impedance transformation mode. The standing wave ratio of the signal output port of the power divider section can be reduced.

Furthermore, the corner position of the power dividing circuit is arranged in an arc angle. The function of beautiful appearance and signal receiving capability enhancement is achieved.

Further, the inner surface of the shell is sequentially provided with a silver plating layer and a copper plating layer from inside to outside, and the outer surface of the shell is processed by adopting a wire drawing oxidation process. The weight can be reduced and the quality intensity and the signal receiving and transmitting intensity can be ensured.

3. Advantageous effects

(1) The utility model adopts the form of plane micro-strip to design the combining circuit and the power dividing circuit, and has the advantages of small volume, light weight and low cost; still be equipped with the isolation mounting panel between the PCB board of combiner part and merit divider part for combiner part 3 and merit divider part 2 can the eclipsed form installation, and occupation space is little (make this POI merit divide the volume of combiner less), and easy dismounting.

(2) The utility model discloses be provided with the power isolation between the output port of ware part is divided to the merit, work and when another signal output port was out of work when a signal output port, can avoid the electric current to flow to non-operating condition's signal output port from operating condition's signal output port, can ensure the correct direction of electric current, avoid producing mutual interference between the output port.

(3) The utility model discloses all adopt the design of plane microstrip form combining circuit and merit branch circuit, the radio frequency signal in not only having realized two way or multichannel operating frequency band when the transmission closes the way, the function of separation when receiving, to the combiner part, still realized keeping apart in the different frequency band more than 75dB at 4G frequency channel and mobile communication frequency channel, and the insertion loss of input port and output port all controls within 0.8dB, has the advantage that power is high, insertion loss is little.

To sum up, the utility model discloses can realize that the radio frequency signal in two way or the multichannel operating band combines the function of separation when route, receipt when the transmission, and its is small, and the interference is few, and power is high and the loss is little.

Drawings

Fig. 1 is a schematic structural view of the combiner part 3 of the present invention when mounted on the housing 1;

fig. 2 is a schematic structural diagram of the power divider part 2 in the present invention;

fig. 3 is a schematic structural diagram of the isolation mounting plate 4 in the present invention;

fig. 4 is a schematic diagram of the power dividing circuit of the present invention for realizing power isolation.

Reference numerals: 1. a housing; 2. a power divider section; 3. a combiner section; 4. and isolating the mounting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

A POI power dividing combiner comprises a shell 1, and a power divider part 2 and a combiner part 3 which are arranged in the shell 1;

as shown in fig. 1, the combiner part 3 includes a PCB board provided with a combiner circuit, and a signal input port and a signal output port provided on the PCB board, the combiner circuit is used for realizing output of a radio station and a mobile communication frequency band, wherein a circuit for receiving the radio station adopts a connection form in which four-stage LC filters are connected in parallel, a circuit for receiving a mobile communication frequency band signal adopts a connection form in which two-stage LC filters are connected in parallel, and a passive device is adopted, so that the working is stable and substantially noiseless. The PCB board used is a copper circuit board, and the portion filled with solid in fig. 1 represents copper distributed on the circuit board. The design of the whole combiner circuit adopts a planar microstrip form, the basic principle of a filter is applied, and compared with the traditional coaxial cavity combiner, the combiner designed in the microstrip form has the advantages of small volume, light weight and low cost; for the combiner part 3, the out-of-band isolation of different frequency bands above 75dB is realized in the 4G frequency band and the mobile communication frequency band, and the insertion loss of the input port and the output port is controlled within 0.8dB, so that the combiner has the advantages of high power and small insertion loss;

as shown in fig. 2, the power divider portion 2 includes a PCB board provided with a power dividing circuit, and a signal input port and two signal output ports provided on the PCB board, where the power dividing circuit is designed according to the principle of a wilkinson power divider, and can equally divide the signal power from the same signal input port to other signal output ports, whereas, when the signal powers from the two signal output ports are equal in amplitude, the signal input port of the power divider portion 2 can be used as a signal output port of a satellite navigation frequency band; the design of the whole power dividing circuit also adopts a planar microstrip form;

as shown in fig. 2, in the power dividing circuit, part of circuits corresponding to two signal output ports are symmetrically arranged, and an isolation resistor is arranged between two symmetrical circuits, so that when one circuit has an open circuit or short circuit problem, the reflected power is absorbed by the isolation resistor, thereby balancing the two output ports; the power divider circuit adopts a step impedance transformation mode to carry out impedance matching, so that the standing-wave ratio of a signal output port of the power divider part 2 can be reduced; the corner position of the power dividing circuit is arranged in an arc angle, so that the power dividing circuit has the functions of attractive appearance and enhancing the signal receiving capacity;

an isolation mounting plate 4 (as shown in fig. 3) is arranged between the PCB of the combiner part 3 and the PCB of the power divider part 2, so that the combiner part 3 and the power divider part 2 can be mounted in an overlapped manner, the occupied space is small (the volume of the POI power divider combiner is small), and the disassembly and assembly are convenient;

as shown in fig. 4, power isolation is provided between the signal output ports of the power divider portion 2, so that when one signal output port is working and the other signal output port is not working, current can be prevented from flowing from the signal output port in a working state to the signal output port in a non-working state, thereby causing mutual interference between the ports;

the inner surface of the shell 1 is sequentially provided with a silver coating and a copper coating from inside to outside, and the outer surface of the shell 1 is processed by adopting a wire drawing oxidation process, so that the weight is reduced, and the quality intensity and the signal transceiving intensity are ensured.

When the POI power dividing combiner is assembled, the PCB of the combiner part 3 is firstly installed in the shell 1, then the PCB and the SMA connector contacts corresponding to the PCB are welded and fixed, then the isolation mounting plate 4 is assembled at the corresponding position in the shell 1, then the PCB of the power dividing combiner part 2 is installed on the isolation mounting plate 4, finally, the other 3 corresponding SMA connector contacts are welded, the shell 1 is packaged after debugging is completed, and the assembly of the POI power dividing combiner is completed.

According to the above, the present invention can realize the functions of combining and separating when transmitting and receiving the radio frequency signals in two or more working frequency bands, and has the advantages of small volume, high power, low loss, and no interference (less interference) between the signal output ports.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A POI power dividing combiner comprises a shell (1), a power dividing combiner part (2) and a combiner part (3) which are arranged in the shell (1), wherein the combiner part (3) comprises a PCB provided with a combining circuit, a signal input port and a signal output port which are arranged on the PCB, and the power dividing combiner part (2) comprises a PCB provided with a power dividing circuit, and a signal input port and at least two signal output ports which are arranged on the PCB; the circuit is characterized in that an isolation mounting plate (4) is arranged between the PCB boards of the combiner part (3) and the power divider part (2), a power supply is arranged between the signal output ports of the power divider part (2) for isolation, and the combiner circuit and the power divider circuit are designed in a planar microstrip mode.

2. The POI power splitting combiner of claim 1, wherein the combining circuit is configured to output a radio station and a mobile communication frequency band, wherein a circuit for receiving the radio station is connected in parallel by four LC filters, and a circuit for receiving a mobile communication frequency band signal is connected in parallel by two LC filters.

3. The POI power splitting combiner of claim 1, wherein the power splitting circuit is designed by using the principle of a Wilkinson power divider.

4. A POI power splitting and combining device as claimed in claim 1, wherein the number of signal output ports of the power splitter part (2) is two.

5. The POI power dividing and combining device of claim 4, wherein the power dividing circuits are symmetrically arranged about the partial circuits of the two signal output ports, and an isolation resistor is arranged between the two symmetrical circuits.

6. The POI power dividing combiner of claim 1, wherein the power dividing circuit performs impedance matching by using a step impedance transformation method.

7. The POI power dividing combiner of claim 1, wherein corner positions of the power dividing circuits are arranged in an arc angle.

8. The POI power dividing and combining device according to claim 1, wherein the inner surface of the casing (1) is sequentially provided with a silver coating and a copper coating from inside to outside, and the outer surface of the casing (1) is processed by a wire drawing oxidation process.