CN105261817B - A kind of interferometer antenna battle array equipped with vector synthesizer - Google Patents
A kind of interferometer antenna battle array equipped with vector synthesizer Download PDFInfo
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- CN105261817B CN105261817B CN201510698445.6A CN201510698445A CN105261817B CN 105261817 B CN105261817 B CN 105261817B CN 201510698445 A CN201510698445 A CN 201510698445A CN 105261817 B CN105261817 B CN 105261817B
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Abstract
The invention discloses a kind of interferometer antenna battle arrays equipped with vector synthesizer, it includes antenna array part（1）And upright part（2）；The antenna array part（1）Including three active vertical poliarizing antennas（3）, fixed seat among an antenna（4）, three support devices（5）；Fixed seat among the antenna（4）Including a support arm fixed seat（6）, a support arm rotation seat（7）, a support arm rotation seat symmetrical member（8）With a upright bar pedestal（9）；The support arm rotation seat（7）With support arm rotation seat symmetrical member（8）Pass through shaft（10）Drive support device（5）With active vertical poliarizing antenna（3）It is rotated horizontally, is fixed by locking device, upright part（2）Including vector synthesizer（21）.The present invention provides a kind of interferometer antenna battle arrays being easily installed with dismounting need to only be installed the antenna array part of different size, and facilitate storage according to the antenna that actual conditions select specification different.
Description
Technical field
The present invention relates to a kind of interferometer antenna battle arrays equipped with vector synthesizer.
Background technology
Direction-finding station is that the mistake of radio wave arrival bearing is measured using instrument and equipment according to propagation properties
Journey.It measures " arrival bearing ", refers to the direction that electric wave reaches in the tangible electromagnetic environment in direction-finder set location, direction-finding station,
Common final purpose is to determine " direction of radiation source " and " specific location of radiation source ".
For interferometer direction finding system, direction finding principle is：According to electric wave in traveling, the electric wave come from different directions arrives
When up to direction estimation antenna array, the phase that spatially each direction-finder antenna unit receives is different, thus mutual phase difference is also different,
By measuring come wave phase and phase difference, you can determine arrival bearing.It is direct measurement direction finding day in interferometer direction finding mode
The phase of line induced voltage, then solves phase difference, and mathematical formulae and the formula of amplitude comparison expression direction finding are quite similar.Interference
Instrument direction finding has the characteristics that precision is high, fireballing and be used widely in electronic warfare.
The characteristics of interferometer direction finding system：Using becoming Baseline, can in use, big base antenna battle array, using more letters
Road receiver, computer and FFT technique so that the system direction finder sensitivity is high, and direction finding accuracy is high, and direction finding speed is fast, can survey
There is certain anti-wavefront distortion ability at the elevation angle.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of convenience for the interferometer direction finding that is suitable for going up to the air
The interferometer antenna battle array equipped with vector synthesizer of installation and the storage after dismounting and dismounting, can select according to actual conditions
Specification and rotation angle, and the radiofrequency signal Vector modulation that three active vertical poliarizing antennas are received is that a radio frequency is believed
It is sent after number.
The purpose of the present invention is achieved through the following technical solutions：A kind of interferometer antenna equipped with vector synthesizer
Battle array, it includes antenna array part and upright part；The antenna array part includes three active vertical poliarizing antennas, a day
The support device of fixed seat and active vertical poliarizing antenna among line centre fixed seat, three connection antennas；In the antenna
Between fixed seat include a support arm fixed seat, a support arm rotation seat, a support arm rotation seat symmetrical member and a upright bar pedestal；
The support arm rotation seat and support arm rotation seat symmetrical member drives support device and active vertical poliarizing antenna to carry out by shaft
It rotates horizontally, is fixed by locking device；Be separately mounted to support arm rotation seat and support arm rotation seat symmetrical member two have
The support device length of source vertical polarized antenna is identical, is mounted on the active vertical poliarizing antenna of support arm fixed seat and mounted on branch
The horizontal linear distance of the active vertical poliarizing antenna of arm rotation seat is less than λ/2, and wherein λ/2 are the half-wave of maximum operating frequency
It is long；The upright part includes upright bar and the radio-frequency cable that is set to inside upright bar, and one end of the upright bar passes through first
Antenna tight lock tube connection aerial plug and upright bar pedestal, the other end of upright bar by the tight lock tube of the second antenna connect data-interface and
External direction-finding equipment.
A kind of interferometer antenna battle array equipped with vector synthesizer further includes main fixed seat, and the main fixed seat passes through second
The tight lock tube of antenna protects data-interface.
The locking device includes rotating nuts and rotating nuts set.
Multiple locating pieces with support arm fixed seat in fixed angle are provided in the shaft, in support arm rotation seat
Angle Selection is carried out when being rotated with support arm rotation seat symmetrical member.
The fixed angle includes 30 degree, 45 degree, 60 degree, 90 degree, 120 degree, 135 degree and 150 degree.
One end that the support device connects active vertical polarized antenna is provided with antenna fixing seat.
It is both provided with rotation backing pin on the support arm rotation seat and support arm rotation seat symmetrical member.
The vector synthesizer include two single-pole three-throw switches, three six throw switches of hilted broadsword, 0 degree of power combiner,
90 degree of power combiners, 180 degree power combiner and 270 degree of power combiners；The input terminal of first single-pole three-throw switch receives
Radiofrequency signal from the active vertical poliarizing antenna mounted on support arm fixed seat, the output end of the first single-pole three-throw switch and
One hilted broadsword, six throw switch connects, and five output ends of six throw switch of the first hilted broadsword are inputted with the first of 0 degree of power combiner respectively
End, the first input end of 90 degree of power combiners, the first input end of 180 degree power combiner, 270 degree of power combiners the
One input terminal is connected with the first input end of six throw switch of third hilted broadsword；The first input end of second single-pole three-throw switch and second
Input terminal receive respectively from mounted on support arm rotation seat active vertical poliarizing antenna and be mounted on support arm rotation seat symmetrical member
Active vertical poliarizing antenna, the output end of the second single-pole three-throw switch connect with the input terminal of six throw switch of the second hilted broadsword,
Wherein four output ends of two hilted broadswords, six throw switch respectively with the second input terminal of 0 degree of power combiner, 90 degree of power combiners
The second input terminal, 180 degree power combiner the second input terminal and 270 degree of power combiners the connection of the second input terminal, the
5th output end of two hilted broadswords, six throw switch passes through resistance eutral grounding；0 degree of power combiner, 90 degree of power combiners, 180 degree power
The output end of synthesizer and 270 degree of power combiners respectively with the second input terminal of six throw switch of third hilted broadsword, third input terminal,
4th input terminal and the connection of the 5th input terminal, the radiofrequency signal after the output end output vector synthesis of six throw switch of third hilted broadsword is extremely
Data-interface.
0 degree of power combiner, 90 degree of power combiners, 180 degree power combiner and 270 degree of power combiners are equal
Including a phase shifter and a synthesizer, the input terminal of phase shifter is received respectively from six throw switch of the first hilted broadsword and the second list
Two output ends of the signal of six throw switch of knife, phase shifter are connect with synthesizer, and output end and the third hilted broadsword six of synthesizer are thrown
Switch connection.
The vector synthesizer further includes a control signal mouth, outside the control signal mouth receives
Transistor-Transistor Logic level signal, for control mounted on support arm rotation seat active vertical poliarizing antenna and be mounted on support arm rotation seat it is symmetrical
The switching of the active vertical poliarizing antenna of part, and the phase for controlling phase shifter.
The beneficial effects of the invention are as follows：
(1) it the present invention provides a kind of interferometer antenna battle array being easily installed with dismounting, can be selected according to actual conditions
The different active vertical poliarizing antenna of specification need to only be installed the antenna array part of different size；And in antenna
After battle array is using completing, three active vertical poliarizing antennas are rotated to together, facilitating storage.
(2) using rotation and locking device so that aerial angle can be selected according to actual conditions, practicability
By force.
(3) further, since antenna can be opened and closed up by the present invention during installation is with dismounting,
It will produce the problem of angle recalculates.And when using the mode that fixed angle locating piece is arranged in shaft, it can be to normal
Angle carries out quick alignment, easy to use and reliable.
(4) vector synthesizer is also set in interferometer antenna battle array by the present invention, and three active vertical poliarizing antennas are connect
Three radiofrequency signals received are synthesized, and the radiofrequency signal after synthesis is sent, and subsequent conditioning circuit is facilitated to be handled.
Description of the drawings
Fig. 1 is 1 decomposition chart of the embodiment of the present invention；
Fig. 2 is the structure chart after the completion of the embodiment of the present invention 1 is assembled；
Fig. 3 is fixed seat partial structural diagram among antenna；
Fig. 4 is data-interface structural schematic diagram；
Fig. 5 is 2 decomposition chart of the embodiment of the present invention；
Fig. 6 is vector synthesizer module frame chart of the present invention；
Fig. 7 is principle of the invention figure；
In figure, 1- antenna arrays part, 2- upright parts, 3- active vertical poliarizing antennas, 4- antennas centre fixed seat, 5- branch
Support arrangement, 6- support arm fixed seats, 7- support arm rotation seats, 8- support arm rotation seat symmetrical members, 9- upright bar pedestals, 10- shafts, 11- are vertical
Bar, 12- aerial plugs, 13- data-interfaces, the tight lock tube of 14- first antennas, the tight lock tube of the second antennas of 15-, the main fixed seats of 16-,
17- rotating nuts, 18- rotating nuts sets, 19- antenna fixing seats, 20- rotate backing pin, 21- vector synthesizers.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 5, a kind of interferometer antenna battle array equipped with vector synthesizer, it includes antenna array part 1 and stands
Bar part 2.
As shown in Fig. 2, the antenna array part 1 includes fixed among three active vertical poliarizing antennas, 3, antennas
The support device 5 of fixed seat 4 and active vertical poliarizing antenna 3 among 4, three connection antennas of seat.
As shown in figure 3, fixed seat 4 includes 6, support arm rotation seats 7, one of a support arm fixed seat among the antenna
A support arm rotation seat symmetrical member 8 and a upright bar pedestal 9；The support arm rotation seat 7 and support arm rotation seat symmetrical member 8 is by turning
Axis 10 drives support device 5 and active vertical poliarizing antenna 3 to be rotated horizontally, and is fixed by locking device.
It is separately mounted to the support of two active vertical poliarizing antennas of support arm rotation seat 7 and support arm rotation seat symmetrical member 8
5 length of device is identical.
In order to avoid phase ambiguity, the active vertical poliarizing antenna 3 for being mounted on support arm fixed seat 6 is rotated with mounted on support arm
The horizontal linear distance of the active vertical poliarizing antenna 3 of seat 7 is less than λ/2, and wherein λ/2 are the half-wavelength of maximum operating frequency.
Antenna in support arm fixed seat 6 and the distance between the antenna on support arm rotation seat 7, with installation
Antenna in support arm fixed seat 6 and the distance between the antenna on support arm rotation seat symmetrical member 8 are equal, and are no more than
λ/2, the i.e. half-wavelength of maximum operating frequency, phase are no more than 180 degree.We select 150 degree of maximum operating frequency herein.
At this point, can be there are two types of situation generation, support device 5 is shorter and support device 5 is longer：As shown in Figure 1, embodiment 1
For for 5 longer situation of support device, antenna distance 600mm, working frequency at this time is 70~200MHz；Such as Fig. 4 institutes
Show, embodiment 2 is antenna distance 220mm in the case of support device 5 is shorter, and working frequency at this time is 200~500.
The upright part 2 includes upright bar 11 and the radio-frequency cable being set to inside upright bar 11, the upright bar 11
One end connects aerial plug 12 and upright bar pedestal 9 by the tight lock tube 14 of first antenna, as shown in figure 4, the other end of upright bar 11 is logical
It crosses the tight lock tube 15 of the second antenna and connects data-interface 13 and external direction-finding equipment.
A kind of interferometer antenna battle array equipped with vector synthesizer further includes main fixed seat 16, and the main fixed seat 16 passes through
The tight lock tube 15 of second antenna protects data-interface 13.
After antenna is using completing, after the process dismantled, the data-interface 13 of upright part 2 can be exposed to sky
In gas, and data-interface 13 is protected using main fixed seat 16, improves the service life of entire antenna array.
The locking device includes rotating nuts 17 and rotating nuts set 18.Be provided in the shaft 10 it is multiple with
Support arm fixed seat 6 is in the locating piece of fixed angle, for being carried out in support arm rotation seat 7 and the rotation of support arm rotation seat symmetrical member 8
Angle Selection.The fixed angle includes 30 degree, 45 degree, 60 degree, 90 degree, 120 degree, 135 degree and 150 degree.
Since antenna can be opened and closed up by the present invention during installation is with dismounting.It will produce angle weight
New the problem of calculating.And when using the mode that fixed angle locating piece is arranged in shaft, common angle can be carried out
Quick alignment, it is easy to use and reliable.
One end that the support device 5 connects active vertical polarized antenna 3 is provided with antenna fixing seat 19.
Rotation backing pin 20 is both provided on the support arm rotation seat 7 and support arm rotation seat symmetrical member 8.
As shown in fig. 6, the vector synthesizer 21 include two single-pole three-throw switches, three six throw switches of hilted broadsword, 0 degree
Power combiner, 90 degree of power combiners, 180 degree power combiner and 270 degree of power combiners；First single-pole three-throw switch
Input terminal receives the radiofrequency signal from the active vertical poliarizing antenna 3 mounted on support arm fixed seat 6, the first single-pole three-throw switch
Output end connect with six throw switch of the first hilted broadsword, five output ends of six throw switch of the first hilted broadsword respectively with 0 degree of power combing
First input end, the 270 degree of work(of the first input end of device, the first input end of 90 degree of power combiners, 180 degree power combiner
The first input end of rate synthesizer is connected with the first input end of six throw switch of third hilted broadsword；The first of second single-pole three-throw switch
Input terminal and the second input terminal receive respectively from mounted on support arm rotation seat 7 active vertical poliarizing antenna 3 and mounted on branch
The active vertical poliarizing antenna 3 of arm rotation seat symmetrical member 8, six throw switch of the output end of the second single-pole three-throw switch and the second hilted broadsword
Input terminal connection, wherein four output ends of six throw switch of the second hilted broadsword respectively with the second input terminal of 0 degree of power combiner,
The second of second input terminal of 90 degree of power combiners, the second input terminal of 180 degree power combiner and 270 degree of power combiners
Input terminal connects, and the 5th output end of six throw switch of the second hilted broadsword passes through resistance eutral grounding；0 degree of power combiner, 90 degree of power close
Grow up to be a useful person, the output end of 180 degree power combiner and 270 degree of power combiners respectively with the second input of six throw switch of third hilted broadsword
End, third input terminal, the 4th input terminal and the connection of the 5th input terminal, the output end output vector synthesis of six throw switch of third hilted broadsword
Radiofrequency signal afterwards is to data-interface 13.
0 degree of power combiner, 90 degree of power combiners, 180 degree power combiner and 270 degree of power combiners are equal
Including a phase shifter and a synthesizer, the input terminal of phase shifter is received respectively from six throw switch of the first hilted broadsword and the second list
Two output ends of the signal of six throw switch of knife, phase shifter are connect with synthesizer, and output end and the third hilted broadsword six of synthesizer are thrown
Switch connection.
The vector synthesizer 21 further includes a control signal mouth, outside the control signal mouth receives
Transistor-Transistor Logic level signal, control digit are 4, wherein 1 is used to control the active vertical poliarizing antenna 3 mounted on support arm rotation seat 7
With the switching of the active vertical poliarizing antenna 3 mounted on support arm rotation seat symmetrical member 8, in addition 3 for controlling the phase of phase shifter
Position.
Fig. 7 is the schematic diagram of interferometer antenna battle array, and " 1 " number antenna indicates the antenna being mounted in support arm fixed seat 6 in figure,
" 2 " number antenna expression is mounted on the antenna on support arm rotation seat 7 in figure, and " 3 " number antenna indicates to be mounted on support arm rotation seat in figure
Antenna on symmetrical member 8.
When arrival bearing is θ, signal reaches 3 antenna times differences, therefore can obtain two wave path-differences, is respectively
Φ 12 and Φ 13.
When the elevation angle of incoming wave signal is 0 °, wave path-difference is as follows
It can be obtained by formula (1) and formula (2)
12/ Φ 13 of tan θ=Φ； (3)
Arrival bearing can be found out by formula (3)
θ=arctan (12/ Φ 13 of Φ).
When the elevation angle of arrival bearing is β, wave path-difference is as follows
It can be obtained by formula (4) and formula (5)
12/ Φ 13 of tan θ=Φ； (6)
Arrival bearing can be found out by formula (6) tangent of negating
θ=arctan (12/ Φ 13 of Φ)；
It can also be obtained by formula (4) and formula (5)
The incoming wave elevation angle can be found out by formula (7) cosine of negating
Claims (10)
1. a kind of interferometer antenna battle array equipped with vector synthesizer, it is characterised in that：It includes antenna array part（1）With upright bar portion
Point（2）；The antenna array part（1）Including three active vertical poliarizing antennas（3）, fixed seat among an antenna（4）, three
Fixed seat among a connection antenna（4）With active vertical poliarizing antenna（3）Support device（5）；It is fixed among the antenna
Seat（4）Including a support arm fixed seat（6）, a support arm rotation seat（7）, a support arm rotation seat symmetrical member（8）It is vertical with one
Bar pedestal（9）；The support arm rotation seat（7）With support arm rotation seat symmetrical member（8）Pass through shaft（10）Drive support device（5）
With active vertical poliarizing antenna（3）It is rotated horizontally, is fixed by locking device；It is separately mounted to support arm rotation seat
（7）With support arm rotation seat symmetrical member（8）Two active vertical poliarizing antennas support device（5）Length is identical, is mounted on branch
Arm fixed seat（6）Active vertical poliarizing antenna（3）With mounted on support arm rotation seat（7）Active vertical poliarizing antenna（3）'s
Horizontal linear distance is less than λ/2, and wherein λ/2 are the half-wavelength of maximum operating frequency；The upright part（2）Including upright bar
（11）, be set to upright bar（11）The vector synthesizer in stage casing（21）, be set to upright bar（11）Internal radio-frequency cable, described is vertical
Bar（11）One end pass through the tight lock tube of first antenna（14）Connect aerial plug（12）With upright bar pedestal（9）, upright bar（11）It is another
One end passes through the tight lock tube of the second antenna（15）Connect data-interface（13）, the vector synthesizer（21）For active by three
Vertical polarized antenna（3）The radiofrequency signal received carries out Vector modulation, and the radiofrequency signal after synthesis is passed through radio-frequency cable
And data-interface（13）It is sent to external direction-finding equipment.
2. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：Further include master
Fixed seat（16）, the main fixed seat（16）Pass through the tight lock tube of the second antenna（15）Protect data-interface（13）.
3. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：The lock
Tight device includes rotating nuts（17）With rotating nuts set（18）.
4. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：Described turns
Axis（10）On be provided with it is multiple with support arm fixed seat（6）In the locating piece of fixed angle, in support arm rotation seat（7）And support arm
Rotation seat symmetrical member（8）Angle Selection is carried out when rotation.
5. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 4, it is characterised in that：Described consolidates
It includes 30 degree, 45 degree, 60 degree, 90 degree, 120 degree, 135 degree and 150 degree to determine angle.
6. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：The branch
Support arrangement（5）Connect active vertical polarized antenna（3）One end be provided with antenna fixing seat（19）.
7. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：The branch
Arm rotation seat（7）With support arm rotation seat symmetrical member（8）On be both provided with rotation backing pin（20）.
8. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 1, it is characterised in that：The arrow
Measure synthesizer（21）Including two single-pole three-throw switches, three six throw switches of hilted broadsword, 0 degree of power combiner, 90 degree of power combings
Device, 180 degree power combiner and 270 degree of power combiners；The input terminal of first single-pole three-throw switch is received from mounted on branch
Arm fixed seat（6）Active vertical poliarizing antenna（3）Radiofrequency signal, the output end of the first single-pole three-throw switch and the first hilted broadsword
Six throw switches connect, five output ends of six throw switch of the first hilted broadsword respectively with the first input end of 0 degree of power combiner, 90 degree
First input of the first input end of power combiner, the first input end of 180 degree power combiner, 270 degree of power combiners
End is connected with the first input end of six throw switch of third hilted broadsword；The first input end of second single-pole three-throw switch and the second input terminal
It is received respectively from mounted on support arm rotation seat（7）Active vertical poliarizing antenna（3）With mounted on support arm rotation seat symmetrical member
（8）Active vertical poliarizing antenna（3）, the input terminal company of six throw switch of the output end of the second single-pole three-throw switch and the second hilted broadsword
It connects, wherein four output ends of six throw switch of the second hilted broadsword are closed with the second input terminal of 0 degree of power combiner, 90 degree of power respectively
Second input terminal of the second input terminal of the second input terminal, 180 degree power combiner grown up to be a useful person and 270 degree of power combiners connects
It connects, the 5th output end of six throw switch of the second hilted broadsword passes through resistance eutral grounding；0 degree of power combiner, 90 degree of power combiners, 180
Spend the output end of power combiner and 270 degree of power combiners respectively with the second input terminal of six throw switch of third hilted broadsword, third
Input terminal, the 4th input terminal and the connection of the 5th input terminal, penetrating after the output end output vector synthesis of six throw switch of third hilted broadsword
Frequency signal is to data-interface（13）.
9. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 8, it is characterised in that：Described 0
It includes a phase shifter to spend power combiner, 90 degree of power combiners, 180 degree power combiner and 270 degree of power combiners
The letter from six throw switch of six throw switch of the first hilted broadsword and the second hilted broadsword is received respectively with the input terminal of a synthesizer, phase shifter
Number, two output ends of phase shifter are connect with synthesizer, and the output end of synthesizer is connect with six throw switch of third hilted broadsword.
10. a kind of interferometer antenna battle array equipped with vector synthesizer according to claim 9, it is characterised in that：Described
Vector synthesizer（21）Further include a control signal mouth, the control signal mouth receive outside Transistor-Transistor Logic level signal,
It is mounted on support arm rotation seat for controlling（7）Active vertical poliarizing antenna（3）With mounted on support arm rotation seat symmetrical member（8）'s
Active vertical poliarizing antenna（3）Switching, and the phase for controlling phase shifter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698445.6A CN105261817B (en) | 2015-10-23 | 2015-10-23 | A kind of interferometer antenna battle array equipped with vector synthesizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510698445.6A CN105261817B (en) | 2015-10-23 | 2015-10-23 | A kind of interferometer antenna battle array equipped with vector synthesizer |
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| CN105261817A CN105261817A (en) | 2016-01-20 |
| CN105261817B true CN105261817B (en) | 2018-10-02 |
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| CN201510698445.6A Active CN105261817B (en) | 2015-10-23 | 2015-10-23 | A kind of interferometer antenna battle array equipped with vector synthesizer |
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| CN117579991B (en) * | 2024-01-16 | 2024-04-02 | 上海铂联通信技术有限公司 | Tripod head communication antenna system, direction finding method and vehicle-mounted tripod head communication antenna system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596614A (en) * | 1944-07-22 | 1948-01-07 | Standard Telephones Cables Ltd | Antenna structure |
| CN201682042U (en) * | 2010-03-12 | 2010-12-22 | 深圳市海生机房技术有限公司 | Folded antenna |
| CN204991924U (en) * | 2015-10-23 | 2016-01-20 | 成都九华圆通科技发展有限公司 | Interferometer antenna battle array with vectorial resultant ware |
-
2015
- 2015-10-23 CN CN201510698445.6A patent/CN105261817B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596614A (en) * | 1944-07-22 | 1948-01-07 | Standard Telephones Cables Ltd | Antenna structure |
| CN201682042U (en) * | 2010-03-12 | 2010-12-22 | 深圳市海生机房技术有限公司 | Folded antenna |
| CN204991924U (en) * | 2015-10-23 | 2016-01-20 | 成都九华圆通科技发展有限公司 | Interferometer antenna battle array with vectorial resultant ware |
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