CN207798960U - Large-scale outfield Antenna testing system - Google Patents
Large-scale outfield Antenna testing system Download PDFInfo
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- CN207798960U CN207798960U CN201820170240.XU CN201820170240U CN207798960U CN 207798960 U CN207798960 U CN 207798960U CN 201820170240 U CN201820170240 U CN 201820170240U CN 207798960 U CN207798960 U CN 207798960U
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Abstract
The utility model is related to a kind of large-scale outfield Antenna testing systems, including：Fixation testing station on carrier to be measured, the mobile test station for carrying out radiation characteristic test, and, processing equipment；Fixed testing station includes：GPS reference station；First tester；And the remote control for controlling mobile test station movement locus；Mobile test station includes：It is controlled by the flying platform that the remote control is moved along scheduled or controllable flight path；It is carried on the flying platform, the GPS movement stations for being positioned in real time to the flying platform；Test probe；And second tester；Processing equipment be used for the measurement data that first tester and the second tester obtain handled with the measurement result for obtaining reflecting the radiation characteristic of the carrier to be measured.GPS movement stations, test probe and the second test equipment are carried by flying platform and carries out radiation characteristic test so that test process is more convenient.
Description
Technical field
The utility model is related to antenna measurement technical fields, more specifically, it relates to a kind of large size outfield antenna measurement
System.
Background technology
Common Antenna testing system includes far field, Compact Range, near field etc., usually by displacement system（Multi-axis turntable is swept
Retouch frame）, vector network analyzer（Or transceiver）, the compositions such as data acquisition and processing system.It, can be with during antenna measurement
It is antenna rotation, can also be probe movement, the track of scanning is the antenna pattern of antenna.
Large-scale antenna system refers to being attached to Attitude（Such as：Large vessel, aircraft, aircraft carrier etc.）On antenna
System, the size of antenna itself is not necessarily very big, but the size of carrier can reach 50 meters to 300 meters, weight tens of tons with
On, it is unable to get true antenna radiation characteristics by existing Antenna testing system.
Therefore, there is an urgent need to the radiation characteristics that a kind of Antenna testing system can realize very large antenna system under complex environment
It measures.
Utility model content
In view of the deficienciess of the prior art, the utility model embodiment is designed to provide a kind of large-scale outfield antenna
Test system, have can testing large carrier antenna radiation characteristics.
The above-mentioned technical purpose of the utility model embodiment technical scheme is that：
A kind of large size outfield Antenna testing system, including：Fixation testing station on carrier to be measured, for carrying out spoke
The mobile test station of characteristic test is penetrated, and, processing equipment；
The fixed testing station includes：
It is carried on carrier to be measured, the GPS reference station for being positioned in real time；
It is connected with the GPS reference station, for handling tested aerial signal that the GPS reference station is sent out to be measured
First tester of data；And
Remote control for controlling mobile test station movement locus；
The mobile test station includes：
It is controlled by the flying platform that the remote control is moved along scheduled or controllable flight path；
It is carried on the flying platform, the GPS movement stations for being positioned in real time to the flying platform, the GPS
Movement station is connected with the GPS reference station and global position system；
It is carried on the flying platform, the test probe for emitting and/or receiving test signal；And
Be connected with the test probe, second for handling test probe transmitting and/or the test signal received
Tester；
The processing equipment is connected with first tester and the second tester, for first tester and the
The measurement data that two testers obtain handled with the measurement result for obtaining reflecting the radiation characteristic of the carrier to be measured.
By using above-mentioned technical proposal, when carrying out antenna radiation characteristics test, emitting performance and reception are carried out respectively
The test of performance；
When detecting the receptivity of carrier to be measured, test probe is in emission state, emits test letter to GPS reference station
Number, remote control control flying platform flies according to scheduled flight path, while by distant in flying platform flight course
Control device is controlled and is adjusted to its flight path, and is carried out in real time to flying platform by GPS reference station and GPS movement stations
Positioning, carries out the acquisition of data during flight, and the first tester handles collected data to obtain multigroup survey
Data are measured, last processing equipment handles measurement data the receptivity that can obtain carrier to be measured；
When detecting the emitting performance of carrier to be measured, fixed testing station is in emission state, and test probe is in reception state,
Test signal is sent out by the system signal source of fixed testing station, remote control controls flying platform and flies according to scheduled flight path
Row, while its flight path is controlled and adjusted by remote control 13 in 22 flight course of flying platform, and pass through
GPS reference station and GPS movement stations position flying platform in real time, and the acquisition of data, test are carried out during flight
The data received are sent to the second tester by probe, and the second tester handles collected data to obtain multigroup survey
Data are measured, last processing equipment handles measurement data the emitting performance that can obtain carrier to be measured；
GPS movement stations, test probe and the second test equipment, which are carried, by flying platform carries out radiation characteristic test so that
Test process is more convenient.
Further, the radiation characteristic includes emitting performance and receptivity, described when carrying out receptivity test
First tester selects frequency spectrograph, second tester to select miniature signal source and/or Network Analyzer；Carrying out emissivity
When can test, second tester is selected such as one or more combinations in lower structure：Signal processing module, frequency spectrograph and net
Network analyzer.
Further, the flying platform selects rotor wing unmanned aerial vehicle.
Further, the signal processing module includes：
Reception amplifier for receiving test signal；
The AD converter being connected with the reception amplifier；And
It is connected with the AD converter, the data processor for being handled test signal.
By using above-mentioned technical proposal, after test signal is received and amplified by reception amplifier, AD converter will be tested
Signal is converted into digital data transmission and is handled to data processor, obtains measurement data.
Further, the GPS reference station includes：
Reference transmitter for emitting the fixed testing station differential position information；
Real-time receivers for receiving mobile test station real time positioning data；
GPS measures antenna；And first communication antenna.
Further, the GPS movement stations include：
Reference receiver for receiving the fixed testing station differential position information；
Real time emission machine for emitting the mobile test station real time position location data；
Airborne version GPS antenna；
Second communication antenna；And
Storage medium for storage location information.
In conclusion the utility model has the advantages that：
First, carrying GPS movement stations, test probe and the second test equipment by flying platform carries out radiation characteristic survey
Examination so that test process is more convenient, and testing cost is lower；
Second, test result is more accurate.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of test system and test process in the utility model embodiment；
Fig. 2 is the structural schematic diagram that system is tested in the utility model embodiment；
Fig. 3 is the structural schematic diagram of signal processing module in the utility model embodiment；
Fig. 4 is the flow chart of test method in the utility model embodiment.
In figure：1, fixed testing station；11, GPS reference station；111, reference transmitter；112, real-time receivers；113、GPS
Measure antenna；114, the first communication antenna；12, the first tester；13, remote control；2, mobile test station；21, GPS is moved
It stands；211, reference receiver；212, real time emission machine；213, airborne version GPS antenna；214, the second communication antenna；215, it stores
Medium；22, flying platform；23, test probe；24, the second tester；241, reception amplifier；242, AD converter；243, number
According to processor；3, processing equipment；4, carrier to be measured.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than all real
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
A kind of large size outfield Antenna testing system, as depicted in figs. 1 and 2, including：Fixation on carrier 4 to be measured
Testing station 1, the mobile test station 2 for carrying out radiation characteristic test, and, processing equipment 3.
Specifically, fixed testing station 1 includes：It is carried on carrier 4 to be measured, the GPS reference station 11 for being positioned in real time；
It is connected with GPS reference station 11, for handling the tested aerial signal that GPS reference station 11 is sent out to obtain the first survey of measurement data
Try instrument 12；And the remote control 13 for controlling 2 movement locus of mobile test station.
GPS reference station 11 includes：Reference transmitter 111 for emitting 1 differential position information of fixed testing station；For connecing
Receive the real-time receivers 112 of 2 real time positioning data of mobile test station；GPS measures antenna 113；And first communication antenna 114；
The transmitting of signal is carried out by reference transmitter 111, the signal that real-time receivers 112 carry out in real time receives, and GPS measures antenna
113 carry out the measurement of position, and the first communication antenna 114 carries out the transmitting-receiving of data, realizes the positioning to mobile test station 2.
Mobile test station 2 includes：It is controlled by the flight that remote control 13 is moved along scheduled or controllable flight path
Platform 22, flying platform 22 select rotor wing unmanned aerial vehicle, correspondingly, the remote controler of the rotor wing unmanned aerial vehicle in order to control of remote control 13,
It is communicated with the signal receiving module for being built in rotor wing unmanned aerial vehicle, realizes the control to rotor wing unmanned aerial vehicle；It is flat to be carried on flight
Platform 22, the GPS movement stations 21 for being positioned in real time to flying platform 22, GPS movement stations 21 and GPS reference station 11 and are defended
Star positioning system is connected；It is carried on flying platform 22, the test probe 23 for emitting and/or receiving test signal；And with
Second tester 24 of the connected test signal for handling the transmitting of test probe 23 and/or reception of test probe 23.
GPS movement stations 21 include：Reference receiver 211 for receiving 1 differential position information of fixed testing station；For sending out
Penetrate the real time emission machine 212 of 2 real time position location data of mobile test station；Airborne version GPS antenna 213；Second communication antenna
214；And the storage medium 215 for storage location information；Reference transmitter 111 is received by reference receiver 211 to emit
Signal, real time emission machine 212 sends real-time positioning signal to real-time receivers 112, and airborne version GPS antenna 213 carries out in real time
Positioning, the second communication antenna 214 communicated with the first communication antenna 114, and the location information of acquisition is stored in storage medium
In 215, to realize the real-time positioning to mobile test station 2.
Radiation characteristic includes emitting performance and receptivity, and when carrying out receptivity test, the first tester 12 is selected
Frequency spectrograph, the second tester 24 select miniature signal source and/or Network Analyzer；When carrying out emitting performance test, second surveys
Instrument 24 is tried to select such as one or more combinations in lower structure：Signal processing module, frequency spectrograph and Network Analyzer, the present embodiment
Middle selection signal processing module, as shown in figure 3, signal processing module includes：Reception amplifier for receiving test signal
241；The AD converter 242 being connected with reception amplifier 241；And be connected with AD converter 242, for test signal into
The data processor 243 of row processing, after test signal is received and amplified by reception amplifier 241, AD converter 242 believes test
Number be converted into digital data transmission is handled to data processor 243, obtains measurement data；In other embodiments, second
Tester 24 can select Network Analyzer, Network Analyzer to be provided simultaneously with the function of signal processing function and frequency spectrograph, therefore
Receptivity test and emitting performance test can be carried out at the same time；When selecting the second tester 24, it is contemplated that flying platform 22
Lifting capacity and cruising ability, therefore signal processing module, frequency spectrograph and Network Analyzer choose the model of lighter in weight.
Processing equipment 3 is connected with the first tester 12 and the second tester 24, for being surveyed to the first tester 12 and second
The obtained measurement data of examination instrument 24 handled with the measurement result for obtaining reflecting the radiation characteristic of carrier 4 to be measured, processing sets
Standby 3 be computer or industrial personal computer equipped with the data processing software for carrying out antenna radiation characteristics data processing function, number
It is the prior art according to processing software, therefore not to repeat here；Measurement result is generally radiation pattern, by aerial radiation side
The antenna radiation characteristics to be measured for surveying carrier can be obtained to figure.
When carrying out antenna radiation characteristics test, the test of emitting performance and receptivity is carried out respectively；
When detecting the receptivity of carrier 4 to be measured, test probe 23 is in emission state, emits to GPS reference station 11 and surveys
Trial signal, remote control 13 control flying platform 22 and fly according to projected path, while in 22 flight course of flying platform
In its flight path is controlled and is adjusted by remote control 13, and by GPS reference station 11 and GPS movement stations 21 to flying
Row platform 22 is positioned in real time, the acquisition of data is carried out during flight, the first tester 12 is to collected data
It is handled to obtain multigroup measurement data, last processing equipment 3, which handles measurement data, can obtain connecing for carrier 4 to be measured
Receive performance；
When detecting the emitting performance of carrier 4 to be measured, fixed testing station 1 is in emission state, and test probe 23, which is in, to be received
State sends out test signal by the system signal source of fixed testing station 1, and remote control 13 controls flying platform 22 according to scheduled
Flight path is flown, while its flight path is controlled and being adjusted by remote control 13 in 22 flight course of flying platform
It is whole, and flying platform 22 is positioned in real time by GPS reference station 11 and GPS movement stations 21, it is carried out during flight
The data received are sent to the second tester 24 by the acquisition of data, test probe 23, and the second tester 24 is to collected
Data are handled to obtain multigroup measurement data, and last processing equipment 3, which handles measurement data, can obtain carrier 4 to be measured
Emitting performance；
GPS movement stations 21, test probe 23 and 24 device of the second tester, which are carried, by flying platform 22 carries out radiation characteristic
Test so that test process is more convenient.
Correspondingly, as shown in figure 4, the present embodiment also provides a kind of large-scale outfield antenna test method, this method is based on upper
The test system stated, including：
501, it establishes the frame of reference according to predetermined policy and sets flight path and the sampling site of flying platform 22, fly
Row track and sampling site cover the targeted test region of carrier 4 to be measured, and in test, fixed testing station 1 is placed in load to be measured
The center of body 4, the frame of reference are the spheric coordinate system established using fixing 1 position of testing station as origin, sample bits
Point is determined by the coordinate in the frame of reference, and is distributed in flight path according to pre- fixed sample interval, and flight path includes edge
Warp direction distribution the first track and along weft direction distribution the second track, the first track and the second track are according to pre-
Fixed sample interval is distributed multiple, and sampling site is determined that predetermined space is according to practical measurement by the coordinate that warp and weft determine
It can be 1 °, 2 °, 5 ° etc. it is required that determining, in general, when being divided into 0, only generate horizontal circular ring or the flight rail of vertical semicircular ring
The range of mark, measurement is determined according to the range of carrier 4 to be measured actual needs sampling；
502, flying platform 22 is run according to the flight path of setting, and is sampled in each sample bits point, is reflected
The measurement data of 4 radiation characteristic of carrier to be measured, measurement data include receptivity data and emitting performance data two parts, are surveyed
Examination process is consistent with the above process, i.e.,：When detecting the receptivity of carrier 4 to be measured, test probe 23 is in emission state, to
GPS reference station 11 emits test signal, and remote control 13 controls flying platform 22 according to scheduled flight, and passes through GPS benchmark
11 and GPS movement stations 21 of standing position flying platform 22 in real time, and the acquisition of data is carried out during flight, and first surveys
Examination instrument 12 handles collected data to obtain multigroup measurement data；It is fixed to survey when detecting the emitting performance of carrier 4 to be measured
Examination station 1 is in emission state, and test probe 23 is in reception state, and test letter is sent out by the system signal source of fixed testing station 1
Number, remote control 13 controls flying platform 22 according to scheduled flight, and by GPS reference station 11 and GPS movement stations 21 to flying
Row platform 22 is positioned in real time, and the acquisition of data is carried out during flight, and test probe 23 sends out the data received
It is sent to the second tester 24, the second tester 24 handles collected data to obtain multigroup measurement data；
When being tested, flying platform 22 is obtained by the relative position relation of GPS reference station 11 and GPS movement stations 21
Location information, due to being influenced by external environment, the process of positioning is easy to happen deviation, therefore usually also according to pre-defined rule
Difference Calculation is carried out to location information, according to base coordinate known to GPS reference station 11, estimates in each Satellite observation and delays
Slowly the various error components changed form visible differential data, the as departure of location information, real-time by GPS reference station 11
This data is sent, while GPS movement stations 21 receive satellite data, also receives the difference that GPS reference station 11 is sent out
Divided data, and its positioning result is modified, thus it is more accurate to the positioning of flying platform 22, improve test result
Accuracy, Difference Calculation can sample existing difference processing software and carry out.
503, data difference calculating is carried out according to preset corrected parameter to the measurement data of acquisition, due to utilizing unmanned plane
When carrying out antenna radiation characteristics test, it can be influenced, be caused by factors such as wind-force, positioning accuracy, flying speed, communication qualities
The data deviation of data packetloss, position deviation, therefore error correction is carried out to measurement data by calculating difference, to further
The accuracy of test result is improved, calculating difference is carried out using existing mathematic interpolation software, and corrected parameter is according to actual test
Environment specifically determines；
504, the antenna radiation characteristics that carrier 4 to be measured is calculated are carried out using processing equipment 3, calculating process passes through place
The data processing software carried in reason equipment 3 carries out, and antenna radiation characteristics generally comprise radiation pattern, amplitude-phase letter
The information such as breath, lobe width.
When being tested, flight path and the sampling site of flying platform 22 are first set, due to flight path and sampling
Site covers targeted test region, when 22 bearing test equipment of flying platform is run along flight path, in each sampling site
It can be obtained the test data of targeted test region after being sampled, then can be obtained after carrying out calculation processing by processing equipment 3
To antenna radiation characteristics to be measured, the test to 4 antenna radiation characteristics of carrier to be measured is completed；Pass through 22 bearing test of flying platform
Equipment carries out test job, without building multi-axis turntable or scanning support as existing test system so that test process
It is more efficient and convenient, and cost is lower.
In the above-described embodiments, it emphasizes particularly on different fields to the description of each embodiment, there is no the part being described in detail in some embodiment,
It may refer to the associated description of other embodiment.
It should be noted that for each method embodiment above-mentioned, for simple description, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should understand that, the utility model is not limited by the described action sequence,
Because according to the utility model, certain steps may use other sequences or be carried out at the same time.Secondly, those skilled in the art
It should know, embodiment described in this description belongs to preferred embodiment, and the action being related to and module might not
It is necessary to the utility model.
In several embodiments provided herein, it should be understood that disclosed device, it can be real in other way
It is existing.For example, the apparatus embodiments described above are merely exemplary, for example, said units division, only one kind patrols
Volume function divides, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or can be with
It is integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed mutual
Coupling or communication connection can be the INDIRECT COUPLING between device or unit or communication connection by some interfaces, can be electricity
Letter or other forms.
The above-mentioned unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
The above, above example are only to illustrate the technical solution of the utility model, and without limiting it；Although
The utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It is still
Can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equally replaced
It changes；And these modifications or replacements, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (6)
1. a kind of large size outfield Antenna testing system, which is characterized in that including：Fixed test on carrier to be measured (4)
It stands (1), the mobile test station (2) for carrying out radiation characteristic test, and, processing equipment (3)；
The fixed testing station (1) includes：
It is carried on carrier to be measured (4), the GPS reference station (11) for being positioned in real time；
It is connected with the GPS reference station (11), for handling tested aerial signal that the GPS reference station (11) is sent out to obtain
The first tester (12) of measurement data；And
Remote control (13) for controlling mobile test station (2) movement locus；
The mobile test station (2) includes：
It is controlled by the flying platform (22) that the remote control (13) is moved along scheduled or controllable flight path；
It is carried on the flying platform (22), the GPS movement stations (21) for being positioned in real time to the flying platform (22),
The GPS movement stations (21) are connected with the GPS reference station (11) and global position system；
It is carried on the flying platform (22), the test probe (23) for emitting and/or receiving test signal；And
It is connected with the test probe (23), the test signal for handling the test probe (23) transmitting and/or receiving
Second tester (24)；
The processing equipment (3) is connected with first tester (12) and the second tester (24), for being surveyed to described first
Examination instrument (12) and the obtained measurement data of the second tester (24) handled with the spoke for obtaining reflecting the carrier to be measured (4)
Penetrate the measurement result of characteristic.
2. large size outfield according to claim 1 Antenna testing system, which is characterized in that the radiation characteristic includes transmitting
Performance and receptivity, when carrying out receptivity test, first tester (12) selects frequency spectrograph, second test
Instrument (24) selects miniature signal source and/or Network Analyzer；When carrying out emitting performance test, the second tester (24) choosing
With one or more combinations in such as lower structure：Signal processing module, frequency spectrograph and Network Analyzer.
3. large size outfield according to claim 1 Antenna testing system, which is characterized in that the flying platform (22) is selected
Rotor wing unmanned aerial vehicle.
4. large size outfield according to claim 2 Antenna testing system, which is characterized in that the signal processing module packet
It includes：
Reception amplifier (241) for receiving test signal；
The AD converter (242) being connected with the reception amplifier (241)；And
It is connected with the AD converter (242), the data processor (243) for being handled test signal.
5. large size outfield according to claim 1 Antenna testing system, which is characterized in that GPS reference station (11) packet
It includes：
Reference transmitter (111) for emitting fixed testing station (1) the differential position information；
Real-time receivers (112) for receiving mobile test station (2) real time positioning data；
GPS measures antenna (113)；And first communication antenna (114).
6. large size outfield according to claim 1 Antenna testing system, which is characterized in that GPS movement stations (21) packet
It includes：
Reference receiver (211) for receiving fixed testing station (1) the differential position information；
Real time emission machine (212) for emitting mobile test station (2) the real time position location data；
Airborne version GPS antenna (213)；
Second communication antenna (214)；And
Storage medium (215) for storage location information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820170240.XU CN207798960U (en) | 2018-01-29 | 2018-01-29 | Large-scale outfield Antenna testing system |
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| CN201820170240.XU CN207798960U (en) | 2018-01-29 | 2018-01-29 | Large-scale outfield Antenna testing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581080A (en) * | 2018-12-21 | 2019-04-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | For assessing the aerial test equipment of short-wave antenna performance |
| CN109660303A (en) * | 2018-11-29 | 2019-04-19 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Short-wave antenna performance evaluation system |
| CN110095657A (en) * | 2018-01-29 | 2019-08-06 | 深圳市新益技术有限公司 | Large-scale outfield Antenna testing system and test method |
| CN111200838A (en) * | 2018-11-16 | 2020-05-26 | 中国移动通信有限公司研究院 | Massive MIMO external field test method and system |
-
2018
- 2018-01-29 CN CN201820170240.XU patent/CN207798960U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095657A (en) * | 2018-01-29 | 2019-08-06 | 深圳市新益技术有限公司 | Large-scale outfield Antenna testing system and test method |
| CN110095657B (en) * | 2018-01-29 | 2024-01-26 | 深圳市新益技术有限公司 | Large-scale outfield antenna test system and test method |
| CN111200838A (en) * | 2018-11-16 | 2020-05-26 | 中国移动通信有限公司研究院 | Massive MIMO external field test method and system |
| CN109660303A (en) * | 2018-11-29 | 2019-04-19 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Short-wave antenna performance evaluation system |
| CN109660303B (en) * | 2018-11-29 | 2021-10-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Short wave antenna performance evaluation system |
| CN109581080A (en) * | 2018-12-21 | 2019-04-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | For assessing the aerial test equipment of short-wave antenna performance |
| CN109581080B (en) * | 2018-12-21 | 2022-03-25 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Aerial test equipment for evaluating short wave antenna performance |
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