CN106921447A - The method for detecting multiple antennas feeding network - Google Patents
The method for detecting multiple antennas feeding network Download PDFInfo
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- CN106921447A CN106921447A CN201511001036.2A CN201511001036A CN106921447A CN 106921447 A CN106921447 A CN 106921447A CN 201511001036 A CN201511001036 A CN 201511001036A CN 106921447 A CN106921447 A CN 106921447A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 230000002159 abnormal effect Effects 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/17—Detection of non-compliance or faulty performance, e.g. response deviations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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Abstract
The present invention relates to communication technical field, the method for disclosing detection multiple antennas feeding network, methods described includes：First radio frequency identification rfid interrogator launches RFID and inquires about signal by multiple antennas feeding network to be detected to multiple RFID label tags, and the multiple RFID label tag is respectively in the overlay area of each antenna of the multiple antennas feeding network；First rfid interrogator receives the tag identifier ID that RFID label tag is returned；The branch corresponding to RFID label tag that detection means is not received corresponding tag ID by the first rfid interrogator is defined as there is abnormal branch in multiple antennas feeding network.The present invention is capable of determining that in multiple antennas feeding network abnormal branch occur, and can be subsequent maintenance provides convenient.
Description
Technical field
The present invention relates to communication technical field, in particular it relates to a kind of side for detecting multiple antennas feeding network
Method.
Background technology
In existing communication network, a base station can have the multiple antennas for being distributed in diverse location, lead to
Cross multiple antennas and send radio signals to designated area.Wireless communication is realized by multiple antennas feeding network
Number transmission.
But the branch in multiple antennas feeding network is probably due to there is abnormal, failure in part reason.
For example, because the part such as antenna, feeder line, power splitter, combiner is subject to external force destruction, water logging, chemistry
The factor such as burn into is aging, and branch breaks down in causing multiple antennas feeding network.Accordingly, it would be desirable to carry
For a kind of method of the failure that can detect multiple antennas feeding network.And due to multiple antennas feeding network
Branch there may be the characteristics of overlapping or be widely distributed, is further capable of determining that with greater need for offer one kind
The detection method that now abnormal cutting really is propped up, in order to subsequently be repaired.
The content of the invention
It is an object of the invention to provide it is a kind of detect multiple antennas feeding network method, so as to solve or
Person at least can partly solve above-mentioned technical problem.
To achieve these goals, the present invention provides a kind of method for detecting multiple antennas feeding network, and it is special
Levy and be, methods described includes：First radio frequency identification rfid interrogator is presented by multiple antennas to be detected
Electric network distinguishes position to multiple RFID label tags transmitting RFID inquiry signals, the multiple RFID label tag
In the overlay area of each antenna of the multiple antennas feeding network；First rfid interrogator is received
The tag identifier ID that RFID label tag is returned；Detection means is not read corresponding tag ID by a RFID
Write the branch corresponding to the RFID label tag that device is received and be defined as there is exception in multiple antennas feeding network
Branch.
Preferably, the power output of first rfid interrogator is to connect the multiple RFID label tag
The RFID for receiving the transmitting of the first rfid interrogator inquires about the critical power of signal.
Preferably, methods described also includes：Second rfid interrogator is fed by multiple antennas to be detected
Avenues of communication beyond network is to the multiple RFID label tag transmitting RFID inquiry signals；2nd RFID
Read write line receives the tag ID that RFID label tag is returned；The detection means by corresponding tag ID not by
The branch corresponding to RFID label tag that first rfid interrogator is received is defined as multiple antennas feeding network
The middle branch that there is exception includes：Detection means is connect corresponding tag ID by the second rfid interrogator
The branch corresponding to RFID label tag for receiving and not received by the first rfid interrogator, is defined as many
There is abnormal branch in antenna feeding network.
Preferably, the first rfid interrogator passes through combiner, power splitter, power combiner or coupler
Access the multiple antennas feeding network.
Preferably, the multiple RFID label tag is respectively positioned at each antenna of the multiple antennas feeding network
Default neighboring region.
According to another aspect of the present invention, a kind of method for detecting multiple antennas feeding network, institute are additionally provided
The method of stating includes：Detection means receives the first message that the first radio frequency identification rfid interrogator sends, institute
Stating first message includes the first rfid interrogator by multiple antennas feeding network to be detected to multiple
The tag identifier ID received after RFID label tag transmitting RFID inquiry signals, wherein, the multiple RFID
Label is respectively in the overlay area of each antenna of the multiple antennas feeding network；Detection means according to
The first message of reception determines the RFID marks that corresponding tag ID is not received by the first rfid interrogator
Sign, the corresponding branch of the RFID label tag is defined as there is abnormal branch in multiple antennas feeding network.
Preferably, the power output of first rfid interrogator is to connect the multiple RFID label tag
The RFID for receiving the transmitting of the first rfid interrogator inquires about the critical power of signal.
Preferably, methods described also includes：Detection means receives second that the second rfid interrogator sends
Message, second message include the second rfid interrogator by multiple antennas feeding network to be detected with
Outer avenues of communication is to the tag ID received after the multiple RFID label tag transmitting RFID inquiry signals；
The detection means determines corresponding tag ID not by the first RFID read-write according to the first message for receiving
The RFID label tag that device is received, multiple antennas transmission network is defined as by the corresponding branch of the RFID label tag
There is abnormal branch in network includes：It is right that detection means determines according to the first message and the second message that receive
The tag ID answered is received and not received by the first rfid interrogator by the second rfid interrogator
RFID label tag, the corresponding branch of the RFID label tag is defined as existing in multiple antennas feeding network different
Normal branch.
Preferably, the first rfid interrogator passes through combiner, power splitter, power combiner or coupler
Access the multiple antennas feeding network.
Preferably, the multiple RFID label tag is respectively positioned at each antenna of the multiple antennas feeding network
Default neighboring region.
By above-mentioned technical proposal, the first radio frequency identification rfid interrogator is presented by multiple antennas to be detected
Electric network distinguishes position to multiple RFID label tags transmitting RFID inquiry signals, the multiple RFID label tag
In the overlay area of each antenna of the multiple antennas feeding network；First rfid interrogator is received
The tag identifier ID that RFID label tag is returned；Detection means is not read corresponding tag ID by a RFID
Write the branch corresponding to the RFID label tag that device is received and be defined as there is exception in multiple antennas feeding network
Branch.Due to when branch occur it is abnormal cannot transmission signal when, the corresponding RFID label tag of branch cannot connect
Receive the RFID inquiry signals of the first rfid interrogator transmitting and tag ID, Jin Er will not be returned
One rfid interrogator will not receive the tag ID of RFID label tag return, thus may determine that going out many days
Occur abnormal branch in line feeding network, and can be subsequent maintenance provides convenient.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with
Following specific embodiment is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is the flow chart of the method for detection multiple antennas feeding network according to embodiments of the present invention；
Fig. 2 is the schematic diagram of application scenarios according to embodiments of the present invention；
Fig. 3 is the flow chart of the method for detection multiple antennas feeding network according to embodiments of the present invention；And
Fig. 4 is the flow chart of the method for detection multiple antennas feeding network according to embodiments of the present invention.
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Specific embodiment described herein is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is the flow chart of the method for detection multiple antennas feeding network according to embodiments of the present invention.The party
Method can be used for including the testing equipment or system of the first rfid interrogator and detection means.Such as Fig. 1 institutes
Show, the method comprises the following steps.
In step s 110, the first rfid interrogator passes through multiple antennas feeding network to be detected to many
Individual RFID label tag transmitting RFID inquiry signals.
Multiple RFID label tags are respectively in the overlay area of each antenna of multiple antennas feeding network.
First rfid interrogator can be accessed many by combiner, power splitter, power combiner or coupler
Antenna feeding network.After the first rfid interrogator is linked into multiple antennas feeding network, its letter for sending
Number just can be transmitted by multiple antennas feeding network.Also can be caused using other modes known in the art
First rfid interrogator launches RFID by multiple antennas feeding network to be detected to multiple RFID label tags
Inquiry signal, the present invention is not particularly limited to this.
Multiple RFID label tags can respectively be located at the default neighboring region of each antenna of multiple antennas feeding network.
For example, RFID label tag is located at centered on corresponding antenna in region of the preset length as radius.
In one embodiment, the power output of the first rfid interrogator is to make multiple RFID tags
RFID to the transmitting of the first rfid interrogator inquires about the critical power of signal.
Critical power refer to when reduce the first rfid interrogator power output when, it will occur certain or
Certain several RFID tag inquires about the situation of signal less than the RFID of the first rfid interrogator, i.e.,
Critical power is under the conditions of the degree of regulation of the first rfid interrogator so that multiple RFID label tag energy
The RFID for enough receiving the first rfid interrogator inquires about the minimum power of signal.For example, in a RFID
Under the conditions of the degree of regulation of read write line, multiple RFID label tags, label 1, label 2 ... label n correspondences
Can receive the first rfid interrogator RFID inquiry signal minimum power respectively P1,
P2 ... Pn, then select the power of maximum in P1, P2 ... Pn as critical power.
Using technical scheme in the present embodiment, when there is exception in branch cause that transmission signal is attenuated, point
The corresponding RFID label tag of branch cannot receive the RFID inquiry signals of the first rfid interrogator transmitting,
And then first rfid interrogator will not receive RFID label tag return tag ID, thus may determine that
There is abnormal branch, and then the accuracy of detection can be improved.
In the step s 120, the first rfid interrogator receives the tag identifier ID that RFID label tag is returned.
For example, RFID label tag inquires about signal in the RFID for receiving the transmitting of the first rfid interrogator
Afterwards, its corresponding tag ID is replied to the first rfid interrogator.First rfid interrogator receives this
Tag ID.
In step s 130, detection means is not received corresponding tag ID by the first rfid interrogator
To RFID label tag corresponding to branch be defined as the presence of abnormal branch in multiple antennas feeding network.
Wherein, detection means is communicatively coupled with the first rfid interrogator by wired or wireless network,
The tag ID of reception is sent to detection means by the first rfid interrogator；Or detection means and first
Rfid interrogator is integrated into same equipment, and the first rfid interrogator is stored data into memory,
Detection means reads the data in memory；Or detection means is obtained using other modes known in the art
The tag ID that the first rfid interrogator is received is obtained, the present invention is not particularly limited to this.
For example, detection means reads the configuration map listing of storage, and map listing includes RFID
Mapping relations in the corresponding label ID and multiple antennas feeding network of label between branch.Detection means is by
The tag ID that one rfid interrogator is received is compared with tag ID in map listing, determines correspondence
The corresponding branch of RFID label tag that is not received by the first rfid interrogator of tag ID.Divide due to working as
Zhi Fasheng extremely cannot transmission signal or during excessive signal attenuation, the corresponding RFID label tag of branch cannot connect
The RFID inquiry signals of the first rfid interrogator transmitting are received, and then causes the RFID label tag will not to return
Multiple corresponding tag ID.Therefore, be judged in multiple antennas feeding network for the branch of determination by detection means
In the presence of abnormal branch.
In one embodiment, methods described also includes：Second rfid interrogator passes through to be detected many days
Avenues of communication beyond line feeding network is to multiple RFID label tags transmitting RFID inquiry signals；Second
Rfid interrogator receives the tag ID that RFID label tag is returned.The detection means is by corresponding tag ID
The branch corresponding to RFID label tag not received by the first rfid interrogator is defined as multiple antennas feed
There is abnormal branch in network may include：Detection means is read corresponding tag ID by the 2nd RFID
The branch corresponding to the RFID label tag that device is received and do not received by the first rfid interrogator is write, really
It is set to and there is abnormal branch in multiple antennas feeding network.
Wherein, detection means is communicatively coupled with the second rfid interrogator by wired or wireless network,
The tag ID of reception is sent to detection means by the second rfid interrogator；Or detection means and second
Rfid interrogator is integrated into same equipment, and the second rfid interrogator is stored data into memory,
Detection means reads the data in memory；Or detection means is obtained using other modes known in the art
The tag ID that the second rfid interrogator is received is obtained, the present invention is not particularly limited to this.2nd RFID
Read write line can by peak power or be enough to make all RFID tags to power carry out signal hair
Penetrate.
Second rfid interrogator is by the avenues of communication beyond multiple antennas feeding network to be detected to multiple
RFID label tag transmitting RFID inquiry signals.When the second rfid interrogator receives what RFID label tag was returned
During tag ID, show that RFID label tag is working properly.Thus, it is possible to determine that the first rfid interrogator does not have
There is the tag ID for receiving RFID label tag because branch's induced fault of multiple antennas feeding network.Enter
And, corresponding tag ID is received by the second rfid interrogator and is not connect by the first rfid interrogator
The branch corresponding to RFID label tag for receiving, is defined as there is abnormal branch in multiple antennas feeding network.
Using technical scheme in the present embodiment, can be excluded because RFID label tag itself goes out when failure is judged
Existing failure causes the RFID label tag will not to reply the situation of tag ID, further improves and multiple antennas are fed
The accuracy of the fault detect of network.
Fig. 2 is the schematic diagram of application scenarios according to embodiments of the present invention.As shown in Fig. 2 multiple antennas are presented
Electric network is used to be launched the signal of signal source by multiple antennas.First rfid interrogator can lead to
Cross combiner and access multiple antennas feeding network, the signal of transmission is transferred to by multiple antennas feeding network
1~n of RFID label tag.Second rfid interrogator by the avenues of communication beyond multiple antennas feeding network to
RFID label tag 1~n sending signals.Detection means passes through network and the first rfid interrogator and the 2nd RFID
Read write line is connected.First rfid interrogator carries out signal transmitting, the second RFID read-write with critical power
Device carries out signal transmitting with peak power.As shown in figure 3, detecting multiple antennas feeding network in the present embodiment
The flow of method comprise the following steps.
In step s 304, the first rfid interrogator passes through multiple antennas feeding network to be detected to many
Individual RFID label tag transmitting RFID inquiry signals, the second rfid interrogator passes through multiple antennas to be detected
Avenues of communication beyond feeding network is to multiple RFID label tags transmitting RFID inquiry signals.In step S306
In, the first rfid interrogator receives the tag identifier ID that RFID label tag is returned, the second RFID read-write
Device receives the tag ID that RFID label tag is returned.In step S308, detection means is by corresponding label
The RFID label tag that ID is received and do not received by the first rfid interrogator by the second rfid interrogator
Corresponding branch, is defined as there is abnormal branch in multiple antennas feeding network.
Using technical scheme in the present embodiment, can be excluded because RFID label tag itself goes out when failure is judged
Existing failure causes the RFID label tag will not to reply the situation of tag ID, further improves and multiple antennas are fed
The accuracy of the fault detect of network, can be subsequent maintenance provides convenient.
Fig. 4 is the flow chart of the method for detection multiple antennas feeding network according to embodiments of the present invention.The party
Method can be used in detection means, and detection means can be the knot of software systems or hardware device, or both
Close.The detection means is communicatively coupled by wired or wireless network with the first rfid interrogator, or
Person's detection means and the first rfid interrogator are integrated into same equipment, and the first rfid interrogator is by number
According in storage to memory, detection means reads the data in memory；Or detection means uses ability
Other modes known to domain obtain the RFID label tag that the first rfid interrogator is received, and the present invention is to this
It is not particularly limited.As shown in figure 4, the method comprises the following steps.
In step S410, detection means receives first that the first radio frequency identification rfid interrogator sends
Message.
First message may include the first rfid interrogator by multiple antennas feeding network to be detected to multiple
The tag identifier ID received after RFID label tag transmitting RFID inquiry signals, wherein, multiple RFID
Label is respectively in the overlay area of each antenna of multiple antennas feeding network.
In the step s 420, detection means according to receive first message determine corresponding tag ID not by
The RFID label tag that first rfid interrogator is received, the corresponding branch of RFID label tag that will be determined is true
It is set to and there is abnormal branch in multiple antennas feeding network.
In one embodiment, the power output of the first rfid interrogator is to make the multiple RFID label tag
The RFID for receiving the transmitting of the first rfid interrogator inquires about the critical power of signal.
Critical power refer to when reduce the first rfid interrogator power output when, it will occur certain or
Certain several RFID tag inquires about the situation of signal less than the RFID of the first rfid interrogator, i.e.,
Critical power is under the conditions of the degree of regulation of the first rfid interrogator so that multiple RFID label tag energy
The RFID for enough receiving the first rfid interrogator inquires about the minimum power of signal.For example, in a RFID
Under the conditions of the degree of regulation of read write line, multiple RFID label tags, label 1, label 2 ... label n correspondences
Can receive the first rfid interrogator RFID inquiry signal minimum power respectively P1,
P2 ... Pn, then select the power of maximum in P1, P2 ... Pn as critical power.
In one embodiment, methods described may also include：Detection means receives the second rfid interrogator hair
The second message sent.Second message includes that the second rfid interrogator passes through multiple antennas transmission network to be detected
Avenues of communication beyond network is to the tag ID received after multiple RFID label tags transmitting RFID inquiry signals.
Detection means determines that corresponding tag ID is not connect by the first rfid interrogator according to the first message for receiving
The RFID label tag for receiving, the corresponding branch of the RFID label tag is defined as in multiple antennas feeding network
Be may include in the presence of abnormal branch：Detection means is corresponding with the determination of the second message according to the first message for receiving
The tag ID RFID that is received and do not received by the first rfid interrogator by the second rfid interrogator
Label, the corresponding branch of RFID label tag that will be determined is defined as there is exception in multiple antennas feeding network
Branch.
In one embodiment, the first rfid interrogator by combiner, power splitter, power combiner or
Coupler accesses the multiple antennas feeding network.
In one embodiment, multiple RFID label tags are respectively positioned at each day of the multiple antennas feeding network
The default neighboring region of line.
When branch occur it is abnormal cannot transmission signal when, the corresponding RFID label tag of branch cannot receive the
The RFID of one rfid interrogator transmitting inquires about signal, and then the first rfid interrogator cannot be received
The tag ID that RFID label tag is returned, therefore technical scheme is capable of determining that abnormal dividing occur in the present invention
Branch, and can be subsequent maintenance provides convenient.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited
Detail in above-mentioned implementation method, in range of the technology design of the invention, can be to the present invention
Technical scheme carry out various simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment,
In the case of reconcilable, can be combined by any suitable means, in order to avoid unnecessary
Repeat, the present invention is no longer separately illustrated to various possible combinations.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as its
Without prejudice to thought of the invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. it is a kind of detect multiple antennas feeding network method, it is characterised in that methods described includes：
First radio frequency identification rfid interrogator is by multiple antennas feeding network to be detected to multiple RFID
Label transmitting RFID inquiry signals, the multiple RFID label tag is located at the multiple antennas transmission network respectively
In the overlay area of each antenna of network；
First rfid interrogator receives the tag identifier ID that RFID label tag is returned；
The RFID label tag institute that detection means is not received corresponding tag ID by the first rfid interrogator
Corresponding branch is defined as there is abnormal branch in multiple antennas feeding network.
2. method according to claim 1, it is characterised in that first rfid interrogator
Power output be the RFID for making the multiple RFID tag launch to the first rfid interrogator
Inquire about the critical power of signal.
3. method according to claim 1 and 2, it is characterised in that methods described also includes：
Second rfid interrogator is by the avenues of communication beyond multiple antennas feeding network to be detected to described
Multiple RFID label tag transmitting RFID inquiry signals；
Second rfid interrogator receives the tag ID that RFID label tag is returned；
The RFID marks that the detection means is not received corresponding tag ID by the first rfid interrogator
Corresponding branch is signed to be defined as including in the presence of abnormal branch in multiple antennas feeding network：
Detection means is received corresponding tag ID by the second rfid interrogator and not by a RFID
The branch corresponding to RFID label tag that read write line is received, is defined as existing in multiple antennas feeding network different
Normal branch.
4. method according to claim 1 and 2, it is characterised in that
First rfid interrogator is accessed described by combiner, power splitter, power combiner or coupler
Multiple antennas feeding network.
5. method according to claim 1 and 2, it is characterised in that
The multiple RFID label tag is located at the default neighbour of each antenna of the multiple antennas feeding network respectively
Connect region.
6. it is a kind of detect multiple antennas feeding network method, it is characterised in that methods described includes：
Detection means receives the first message that the first radio frequency identification rfid interrogator sends, and described first disappears
Breath includes that the first rfid interrogator is sent out by multiple antennas feeding network to be detected to multiple RFID label tags
The tag identifier ID received after RFID inquiry signals is penetrated, wherein, the multiple RFID label tag difference
In the overlay area of each antenna of the multiple antennas feeding network；
Detection means determines corresponding tag ID not by the first RFID read-write according to the first message for receiving
The RFID label tag that device is received, multiple antennas transmission network is defined as by the corresponding branch of the RFID label tag
There is abnormal branch in network.
7. method according to claim 6, it is characterised in that first rfid interrogator
Power output be the RFID for making the multiple RFID tag launch to the first rfid interrogator
Inquire about the critical power of signal.
8. the method according to claim 6 or 7, it is characterised in that methods described also includes：
Detection means receives the second message that the second rfid interrogator sends, and second message includes the
Two rfid interrogators are by the avenues of communication beyond multiple antennas feeding network to be detected to the multiple
The tag ID received after RFID label tag transmitting RFID inquiry signals；
The detection means determines corresponding tag ID not by a RFID according to the first message for receiving
The RFID label tag that read write line is received, multiple antennas feedback is defined as by the corresponding branch of the RFID label tag
There is abnormal branch in electric network includes：
Detection means determines corresponding tag ID by second according to the first message and the second message that receive
The RFID label tag that rfid interrogator is received and do not received by the first rfid interrogator, will be described
The corresponding branch of RFID label tag is defined as there is abnormal branch in multiple antennas feeding network.
9. the method according to claim 6 or 7, it is characterised in that
First rfid interrogator is accessed described by combiner, power splitter, power combiner or coupler
Multiple antennas feeding network.
10. the method according to claim 6 or 7, it is characterised in that
The multiple RFID label tag is located at the default neighbour of each antenna of the multiple antennas feeding network respectively
Connect region.
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| CN201511001036.2A CN106921447B (en) | 2015-12-28 | 2015-12-28 | Method for detecting multi-antenna feed network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019024630A1 (en) * | 2017-08-04 | 2019-02-07 | 歌尔股份有限公司 | Antenna testing apparatus, system and method |
| CN110267298A (en) * | 2019-06-14 | 2019-09-20 | 深圳市觅拓物联信息技术有限公司 | A kind of monitoring method of link load, monitoring device and gateway |
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| CN106921447B (en) | 2020-10-27 |
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