CN206481291U - A kind of path loss detecting system - Google Patents
A kind of path loss detecting system Download PDFInfo
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- CN206481291U CN206481291U CN201720143390.7U CN201720143390U CN206481291U CN 206481291 U CN206481291 U CN 206481291U CN 201720143390 U CN201720143390 U CN 201720143390U CN 206481291 U CN206481291 U CN 206481291U
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Abstract
The utility model embodiment discloses a kind of path loss detecting system, including：Radio frequency identification RFID card reader, combiner, attenuator and room divided antenna, wherein, the RFID card reader is electrically connected with the combiner, and the combiner is connected by room subsystem feeder network with the room divided antenna；The RFID card reader is also connected by the attenuator with the room divided antenna；The combiner is also connected with base station, receives the output signal of the base station, and the output signal of the output signal of the base station and the RFID card reader is combined, and the signal after combining is sent by room subsystem feeder network to the room divided antenna；The RFID card reader sends output signal by the attenuator to the room divided antenna.
Description
Technical field
The utility model is related to path loss detection technique, more particularly to a kind of path loss detecting system.
Background technology
Increasing to the demand of mobile Internet along with people, mobile subscriber is continuous to network quality and traffic demand
Lifting, many important indoor places strengthen covering and hoist capacity by indoor distribution antenna-feedback system.Indoor distributed system by
Antenna-feedback system is responsible for the transmission and distribution of signal, once antenna-feedback system goes wrong, it will directly affect the covering of signal.So
And, built more than antenna-feedback system using passive device, do not possess working condition self monitor and alarm function.So, how
The running status of antenna-feedback system is monitored, becomes the new problem of urgent need to resolve.At present, antenna-feedback system is detected, can only
Send special messenger to carry special instrument to reach the spot, indoor distribution antenna-feedback system is taken apart paragraph by paragraph and detected.This side of method one
Substantial amounts of manpower and materials are expended in face, and do not accomplish monitoring in real time.
Utility model content
In order to solve the above technical problems, the utility model embodiment is expected to provide a kind of path loss detecting system, can be fast
The circuit loss value of branch road where speed accurately determines out each room divided antenna.
A kind of path loss detecting system that the utility model embodiment is provided, it is characterised in that the system includes：Penetrate
Frequency marking knows RFID card reader, combiner, attenuator and room divided antenna, wherein,
The RFID card reader is electrically connected with the combiner, the combiner by room subsystem feeder network with it is described
Room divided antenna connection；
The RFID card reader is also connected by the attenuator with the room divided antenna；
The combiner is also connected with base station, receives the output signal of the base station, and by the output signal of the base station
Be combined with the output signal of the RFID card reader, and by the signal after combining by room subsystem feeder network to described
Room divided antenna is sent；The RFID card reader sends output signal by the attenuator to the room divided antenna.
In such scheme, the room divided antenna includes the first Room divided antenna and second Room divided antenna；
The combiner is connected by room subsystem feeder network with first Room divided antenna；
The RFID card reader is also connected by the attenuator with the second Room divided antenna；
The combiner sends the signal after combining by room subsystem feeder network to first Room divided antenna；Institute
RFID card reader is stated to send output signal to the second Room divided antenna by the attenuator.
In such scheme, RFID tag is provided with the room divided antenna；
First Room divided antenna and the second Room divided antenna are respectively arranged with RFID tag.
In such scheme, the attenuator is fixed attenuator.
In such scheme, the system also includes：3rd Room divided antenna；The 3rd Room divided antenna is divided by the room
System feeder network is connected with the combiner；
The combiner sends the signal after combining by room subsystem feeder network to the 3rd Room divided antenna.
In such scheme, RFID tag is provided with the 3rd Room divided antenna.
In such scheme, first Room divided antenna, the second Room divided antenna and the 3rd Room divided antenna have
Identical electrology characteristic.
The technical scheme of the utility model embodiment, sends base station output signal into one input port of combiner, RFID
Card reader output signal passes through another input port of its output port feeding combiner；Combiner output signal feeding room point is
System feeder network, the multiple room divided antennas for being integrated with RFID tag of network end-point connection；Another output port of RFID card reader
The signal feeding fixed attenuator of output, fixed attenuator output signal sends into the room divided antenna for being integrated with RFID tag.Pass through
RFID card reader power output is set gradually to increase, the road of branch road where the room divided antenna being connected with fixed attenuator can be calculated
Damage；And by continuing to make the increase of RFID card reader power output, that is, calculate the room point day being connected with room subsystem feeder network
The path loss of branch road where line.In the utility model embodiment, multiple room divided antennas can be connected on the subsystem feeder network of room, and
Path loss on each branch road where multiple room divided antennas can be detected.Detected by path loss of the present utility model and be
System, so as to the circuit loss value of branch road where rapidly and accurately determining each room divided antenna.
Brief description of the drawings
Fig. 1 is the composition structural representation of the path loss detecting system of the utility model embodiment；
Fig. 2 is the equivalent structure schematic diagram of the path loss detecting system of the utility model embodiment.
Embodiment
In the case where not conflicting, the technical scheme between embodiment described in the utility model can merge.
As shown in figure 1, room of the present utility model point antenna-feedback system path loss detecting system, including：2/3/4G base stations,
RFID card reader, combiner, room subsystem feeder network, fixed attenuator, the room divided antenna of integrated rfid-tag.Wherein：
2/3/4G base stations：For sending cellular communication signal；
RFID card reader：For sending RFID polling signals, RFID answer signals are received, and with multiple radio-frequency heads
Mouthful, in Fig. 1 by taking two ports as an example；
Combiner：2/3/4G base station signals and RFID signal are combined；
Room subsystem feeder network：For transmitting 2/3/4G base station signals and RFID signal, including feeder line, combiner and coupling
Clutch etc.；
Fixed attenuator：Device with accurate attenuation；
The room divided antenna of integrated rfid-tag：RFID tag is used to receive RFID polling signals, while answer signal is sent,
Room divided antenna is used to send the radiation of 2/3/4G base station signals.
The room of the present utility model point specific annexation of antenna-feedback system path loss detecting system is as follows：2/3/4G base stations are defeated
Go out signal feeding one input port of combiner, RFID card reader output signal sends into combiner by its port 1, and another is defeated
Inbound port；Combiner output signal sends into room subsystem feeder network, and room subsystem feeder network end connection is multiple integrated
The room divided antenna of RFID tag；The signal feeding fixed attenuator that RFID card reader port 2 is exported, its output signal feeding collection
Into the room divided antenna of RFID tag；The room divided antenna of two branch roads has identical electrology characteristic up and down.
An exemplary embodiments of the present utility model are as follows：2/3/4G base station equipments, RFID card reader, combiner, which are fixed, to decline
The room divided antenna for subtracting device and following stage integrated rfid-tag is held together, and is generally positioned in light current well, the feedback of room subsystem
Gauze network and the multiple room divided antennas for being integrated with RFID tag of following stage need cloth to be placed on ad-hoc location according to covering.It is according to this
System design, only the power interpolation between passage RFID card reader output port 1 and 2, and fixed attenuator value, you can survey
Feeder loss value to be measured is measured, concrete methods of realizing is as follows.
Fig. 1 is simplified and equivalent loss model is set up, as shown in Figure 2.RFID card reader output power value Pout, room to be measured
The attenuation for dividing antenna-feedback system branch road is Loss1, and the attenuation of fixed attenuator is Loss2, and room divided antenna is marked with RFID
Space loss between label is Loss3, and the receiving sensitivity of RFID tag is Psen.
Wherein Loss2<Loss1, n and m represent the power output increase number of times in two stages respectively.Detection process starts
Afterwards, the first stage is initially entered, RFID card reader power output Pout is configured to minimum Pmin, RFID card reader power output
Increase xdB, judge that can RFID tag 2 (reference label) be read into, if can not read, continue to increase RFID card reader
Output power value xdB, if can read, output power value is now Pmin+n*x, correspondence fixed attenuation amount Loss2.Connect down
To enter second stage, RFID card reader power output increase xdB judges that can RFID tag 1 (label to be measured) be read into,
If can not read, RFID card reader power output continues to increase xdB, if it is possible to read, output power value is now
Pmin+n*x+m*x, can calculate attenuation Loss1=Loss2+m*x to be measured accordingly, and testing process terminates.Above procedure is only
Detected for wherein one branch road in the subsystem network of room.It will be appreciated by those skilled in the art that when room subsystem feeder line
Network end-point be connected with it is multiple be integrated with RFID tag room divided antenna when, can repeatedly second stage, obtain all
The active loss numerical value of branch road.
Described above, preferred embodiment only of the present utility model is not intended to limit protection of the present utility model
Scope.
Claims (7)
1. a kind of path loss detecting system, it is characterised in that the system includes：Radio frequency identification RFID card reader, combiner,
Attenuator and room divided antenna, wherein,
The RFID card reader is electrically connected with the combiner, and the combiner passes through room subsystem feeder network and the room point
Antenna is connected；
The RFID card reader is also connected by the attenuator with the room divided antenna；
The combiner is also connected with base station, receives the output signal of the base station, and by the output signal of the base station and institute
The output signal for stating RFID card reader is combined, and the signal after combining is divided by room subsystem feeder network to the room
Antenna is sent；The RFID card reader sends output signal by the attenuator to the room divided antenna.
2. system according to claim 1, it is characterised in that the room divided antenna includes the first Room divided antenna and second Room
Divided antenna；
The combiner is connected by room subsystem feeder network with first Room divided antenna；
The RFID card reader is also connected by the attenuator with the second Room divided antenna；
The combiner sends the signal after combining by room subsystem feeder network to first Room divided antenna；It is described
RFID card reader sends output signal by the attenuator to the second Room divided antenna.
3. system according to claim 1, it is characterised in that be provided with RFID tag on the room divided antenna；
First Room divided antenna and the second Room divided antenna are respectively arranged with RFID tag.
4. system according to claim 1, it is characterised in that the attenuator is fixed attenuator.
5. system according to claim 2, it is characterised in that the system also includes：3rd Room divided antenna；Described 3rd
Room divided antenna is connected by the room subsystem feeder network with the combiner；
The combiner sends the signal after combining by room subsystem feeder network to the 3rd Room divided antenna.
6. system according to claim 5, it is characterised in that be provided with RFID tag on the 3rd Room divided antenna.
7. system according to claim 6, it is characterised in that first Room divided antenna, the second Room divided antenna with
And the 3rd Room divided antenna has identical electrology characteristic.
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|---|---|---|---|
| CN201720143390.7U CN206481291U (en) | 2017-02-16 | 2017-02-16 | A kind of path loss detecting system |
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| CN201720143390.7U CN206481291U (en) | 2017-02-16 | 2017-02-16 | A kind of path loss detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116095736A (en) * | 2023-01-31 | 2023-05-09 | 中国铁塔股份有限公司 | Link loss measurement system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116095736A (en) * | 2023-01-31 | 2023-05-09 | 中国铁塔股份有限公司 | Link loss measurement system and method |
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