CN110137692A - A kind of ground telemetering antenna and platform - Google Patents
A kind of ground telemetering antenna and platform Download PDFInfo
- Publication number
- CN110137692A CN110137692A CN201910355275.XA CN201910355275A CN110137692A CN 110137692 A CN110137692 A CN 110137692A CN 201910355275 A CN201910355275 A CN 201910355275A CN 110137692 A CN110137692 A CN 110137692A
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- Prior art keywords
- antenna
- dielectric
- slab
- telemetering
- feeder line
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/04—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
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Abstract
The invention belongs to antenna transmission technique field, it is related to a kind of ground telemetering antenna and platform.By the way that telemetering antenna is packaged in antenna house, installation easy to carry；Using the dipole antenna of the two-sided form of dielectric-slab, i.e. dipole a minor matters cover copper in dielectric-slab front, another minor matters covers copper in medium back, collectively forms a radiating element；Dipole antenna has the characteristics that with wide, high-efficient and small in size；Radiation cell array is symmetrically arranged structure in two sides using feeding network as center axis, and feeding network has impedance matching effect；In addition the gain of antenna and frequency can be selected by the adjustment of radiating element；Provide the ground telemetering antenna of a kind of small size, low cost and ground weight.A kind of platform based on the ground telemetering antenna is still further provided, controlled device is carried out to automatically track communication.
Description
Technical field
The invention belongs to antenna transmission technique fields, and in particular to a kind of ground telemetering antenna and platform.
Background technique
Currently, technical grade unmanned plane is widely used to each field such as military, civilian and commercial.For technical grade unmanned plane
More it is used for the every field such as petroleum and natural gas pipe hunting, electric power hunting, logistic industry, mapping and environmental monitoring.For
Ensure that unmanned plane is more reliable safer in extensive use, to increase the communication of unmanned plane, figure biography sum number passes distance, unmanned plane day
Line plays a crucial role, and has extensive development prospect.
The unmanned plane telemetering antenna of existing overlength distance transmission, it is necessary to all be high-gain aerial, be cooperated using antenna private
Turntable is taken, telemetering antenna is mounted on turntable, the mode guided with unmanned plane, by the side of antenna moment alignment unmanned plane during flying
Position, there are many kinds of this antenna systems, micro-strip array antenna, horn reflector antenna and yagi aerial etc..Different antenna weights
Amount is different with size, and mating turntable is also respectively different, and cost is also just different.But according to existing actual conditions, all habit application
Micro-strip array antenna is as telemetering antenna, mainly due to light-weight and beautiful, while in order to reduce the size, is chiefly used in 2400MHz
High band.But telemetering receiver is vulnerable to WIFI around and bluetooth interference, therefore when each flight, it is necessary to which it is suitable to be chosen over
Place is monitored periphery electromagnetic environment, is confirmed whether there is 2400MHz interference.And in 1400MHz, micro-strip antenna array
Unit and antenna size can all increase.In order to guarantee gain, and size is reduced as far as possible, can reduce array element quantity in design
But expensive high-frequency dielectric plate must be selected, antenna cost can be greatly promoted in this way.If set using conventional dielectric-slab
Count antenna, it is desirable to guarantee that gain must just increase array element quantity, also considerably increase antenna size and weight at the same time.In addition
There is also an important problem, smaller bandwidth, 2400MHz can satisfy use for microstrip antenna, but routine when 1400MHz
Design method can only guarantee 10MHz or so bandwidth, it is desirable to expand bandwidth, need on antenna element aperture and other a series of set
Meter, emulation and design are all very many and diverse, and the design cycle is very long.The antenna of other classes is selected, performance is also able to satisfy, but weight mistake
Greatly, while the private bearing capacity for taking turntable is also increased, cost is increase accordingly, and installation carrying etc. is very inconvenient.
Summary of the invention
The main object of the present invention is to be to provide a kind of ground telemetering antenna and platform, and the body of telemetering antenna is effectively reduced
Product, weight and cost.
To achieve the above object, the invention provides the following technical scheme:
A kind of ground telemetering antenna, is characterized in that, including antenna house, telemetering antenna, radio frequency connector, radio frequency electrical
Cable and fixed column；The telemetering antenna includes dielectric-slab, several radiating elements and feeding network, and wherein feeding network includes four
The lateral feeder line of parallel arrangement and the longitudinal feeder line to intersect vertically with four each midpoints of lateral feeder line, every lateral feeder line and vertical
Impedance transformation is equipped with to feeder line point of intersection；Longitudinal feeder line midpoint is equipped with feeding point, transverse direction of the radiating element along each parallel arrangement
Feeder line distribution, and it is symmetrical about longitudinal feeder line；Radiating element and feeding network cover copper in dielectric-slab；The radiating element includes
Two minor matters of dipole, the corresponding copper that covers of described two minor matters constitute the two-sided array antenna of dipoles in dielectric-slab two sides；It is distant
For observation line level packages in antenna house, dielectric-slab offers through-hole, and fixed column passes through through-hole and dielectric-slab is fixed on antenna house
It is interior；Radio frequency connector is fixed in antenna house, and radio frequency electrical cable one end connects radio frequency connector, and the other end connects feeding point.
Further, the minor matters 90-degree bent of partial radiation unit.
Further, antenna house bottom is additionally provided with the antenna back panel with telemetering antenna parallel arrangement, opens up on antenna back panel
There is a through-hole, the through-hole of dielectric-slab and antenna back panel can be such that fixed column penetrates through；The distance of antenna back panel to telemetering antenna is its wavelength
A quarter.
Further, antenna back panel is aluminium sheet.
Further, dielectric-slab is the FR4 dielectric-slab of 1mm.
Further, feeding network is two-sided parallel strips feeding network, and on the two sides of dielectric-slab, the corresponding feeder line that carries out covers
Copper.
Further, radio frequency electrical cable is 50 ohm coaxial lines.
Further, impedance of the horizontal line feeder line at radiating element feed mouth is 50 ohm.
Further, radio frequency connector is SMA or N-type band flange radio frequency.
A kind of ground telemetering antenna platform, it is characterized in that, including tripod turntable, and be placed in tripod and turn
Ground telemetering antenna as described above on platform.
Compared with prior art, the beneficial effects of the present invention are:
1. a kind of ground telemetering antenna of the present invention, by the way that telemetering antenna is packaged in antenna house, installation easy to carry；It adopts
With the dipole antenna of the two-sided form of dielectric-slab, i.e. dipole a minor matters cover copper in dielectric-slab front, another minor matters exists
Medium back covers copper, collectively forms a radiating element；Dipole antenna has with wide, high-efficient and small in size etc. special
Point；Radiation cell array is symmetrically arranged structure in two sides using feeding network as center axis, and feeding network has impedance matching effect；
In addition the gain of antenna and frequency can be selected by the adjustment of radiating element；Provide a kind of small size, low cost
With the ground telemetering antenna of ground weight.
If if the size of 2. antennas by antenna size by using or encapsulation is limited, the minor matters of radiating element can be set
It is calculated as all bending or part 90-degree bent, the length of bending accounts for the one third of single minor matters length to a quarter.
3. increasing reflective back plane especially aluminium sheet at the antenna back side, it can be realized more high-gain and seldom weight brought to increase
Add.
4. using 1mm thickness conventional media plate FRA, dielectric constant is high, can accordingly reduce antenna size, and FR4 medium
Plate cost is very low.
5. using two-sided parallel strips feeding network form, copper symmetrically is covered to the top and bottom feeder line progress of dielectric-slab, seldom
Occupancy radiating element headroom section, and the efficiency of radiating element and gain are not impacted.
6. the feed line impedance at radiating element is 50 ohm, a quarter impedance transformer met in microwave principle is former
Reason.
7. a kind of ground telemetering antenna platform of the present invention, telemetering antenna is mounted in antenna house, it is placed in tripod and turns
On platform, controlled device is carried out to automatically track communication.
Detailed description of the invention
Fig. 1 is the top view of telemetering antenna of the present invention；
Fig. 2 is the bottom view of telemetering antenna of the present invention；
Fig. 3 is overall structure diagram of the invention；
Fig. 4 is the standing-wave ratio analogous diagram of telemetering antenna of the present invention；
Fig. 5 is the face telemetering antenna H of the present invention benefit directional diagram；
Fig. 6 is the face telemetering antenna E of the present invention benefit directional diagram.
Wherein, 1- telemetering antenna；2- antenna house；3- fixed screw；4- fixed column；5- antenna back panel；6- radio frequency connector；
7- impedance transformation；8- through-hole；9- radiating element；10- dielectric-slab；11- feeding network；12- feeding point；13- transverse direction feeder line；14-
Longitudinal feeder line；.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is not limitation of the present invention.
A kind of ground telemetering antenna of the present invention, including antenna house 2, telemetering antenna 1, radio frequency connector 6, radio frequency electrical cable and
Fixed column 4.
Such as Fig. 1, the telemetering antenna 1 includes dielectric-slab 10, several radiating elements 9 and feeding network 11, wherein transmission network
Network 11 includes the lateral feeder line 13 of four parallel arrangements and longitudinal feeder line 14 for intersecting vertically with four each midpoints of lateral feeder line 13,
Every lateral feeder line 13 and longitudinal 14 point of intersection of feeder line are equipped with impedance transformation 7；Longitudinal feeder line midpoint is equipped with feeding point 12, radiation
Unit is distributed along the lateral feeder line of each parallel arrangement, and symmetrical about longitudinal feeder line, and radiating element 9 and feeding network 11 cover copper
In dielectric-slab 10.
The gain of antenna can flexibly be increased and decreased according to radiating element quantity, and the frequency of antenna can also be according to radiation
Length is effectively extended and is shortened.
Referring to Fig.1 with 2, radiating element 9 includes two minor matters of dipole, and described two minor matters are corresponding to cover copper Yu Jiezhi
10 two sides of plate, constitutes the two-sided array antenna of dipoles, and the minor matters 90-degree bent of partial radiation unit can be carried out in limited space,
The length of bending accounts for the one third of single minor matters length to a quarter.Dipole antenna has with wide, high-efficient and volume
The features such as small, so dipole antenna can be realized on conventional media plate, but realizes the array dipoles antenna based on dielectric-slab
It is more difficult.It is the two-sided form of dielectric-slab in the present invention, i.e. dipole a minor matters cover copper in dielectric-slab front, another branch
Section covers copper in medium back, collectively forms a radiating element.Each radiating element do not need it is very wide, radiation cell array with
Impedance matching feeding network is center axis in two sides symmetric arrays structure.
Referring to Fig. 3, for 1 level packages of telemetering antenna in antenna house 2, dielectric-slab 10 offers through-hole 8, and fixed column 4 passes through
Dielectric-slab 10 is fixed in antenna house by through-hole 8, and it is each that the length of fixed column guarantees that distance of the dielectric-slab apart from antenna back panel is equal to
From a quarter of wavelength.
Radio frequency connector 6 is fixed in antenna house 2, and the present embodiment is affixed to antenna house lower surface, but is fixed on antenna
Other positions have no effect on its use in cover 2.Radio frequency electrical cable one end connects radio frequency connector 6, and the other end connects feeding point 12.
The dielectric-slab of the present embodiment uses 1mm thickness conventional media plate FR4, having a size of
Other thickness and other kinds of medium plate can also be used in 450mm*600mm*1mm.In view of cost and weight
Factor, FR4 dielectric constant is high, can reduce antenna size, and FR4 dielectric-slab cost is again very low.
To realize more high-gain and not increasing radiating element, the gold of the setting of 2 bottom of antenna house and the parallel arrangement of telemetering antenna 1
Belong to antenna back panel 5, preferably thin aluminum sheet, antenna house can glue be encapsulated on aluminium sheet, increasing the radiation gain of antenna back panel aft antenna can be with
It greatly promotes, while seldom weight being brought to increase.Offer through-hole on antenna back panel 5, dielectric-slab 10 and antenna back panel 5 it is logical
Hole can be such that fixed column 4 penetrates through；The distance of antenna back panel 5 to telemetering antenna 1 is a quarter of its wavelength.The length of fixed column is protected
The a quarter that distance of the dielectric-slab apart from antenna back panel is equal to respective wavelength is demonstrate,proved, fixed column 4 passes through dielectric-slab 10 and antenna is carried on the back
The upper end of the through-hole of plate 5, fixed column 5 is fixedly connected by fixed screw 3 with dielectric-slab 10, and lower end passes through fixed screw and antenna
Backboard 5 is fixed.
Feeding network 11 is two-sided parallel strips feeding network, and on the two sides of dielectric-slab 10, the corresponding feeder line that carries out covers copper.It should
Feeding network is different from microstrip feed network, do not need large area with covering copper, it is only necessary to the top and bottom feeder line of dielectric-slab into
Row symmetrically covers copper, and shadow is not caused to the benefit of radiating element and gain in the headroom section of occupancy radiating element few in this way
It rings.
Radio frequency connector 6 is SMA in the present embodiment or N-type band flange radio frequency, radio frequency electrical cable are 50 ohm coaxial lines.It is horizontal
It is 50 ohm that line feeder line 13, which feeds the impedance at mouth in radiating element 9,.Radio frequency connector is fixed on antenna house 1, is used for connection number
According to chain, feeder line needs to emulate the impedance of two-sided parallel strips, a quarter impedance transformer principle in applied microwave principle, protects
Demonstrate,proving the feed line impedance at radiating element is 50 ohm, is connected at feeding point with 50 ohm coaxial wire bondings first, is divided into two 100
The two-sided parallel strips of ohm, then feeder line is converted by a quarter impedance, make feeder line impedance at each radiating element feed mouth
It is 50 ohm.
Additionally, it is provided a kind of ground telemetering antenna platform, including tripod turntable, and be placed on tripod turntable as before
The ground telemetering and remote-control integral antenna, carries out automatically tracking communication.
The present invention can be applied particularly to unmanned plane.It is provided according to Ministry of Industry and Information, China, the use of push-button aircraft system
Frequency range plans 840.5- according to Radio Frequency Allocation Regulation of the People's Republic of China and China's frequency spectrum service condition
845MHz, 1430-1444MHz and 2408-2440MHz frequency range are used for push-button aircraft system.1400MHz frequency is nearby gone back
It is not occupied by commercial communication, also unallocated to give other application, 1400MHz frequency has huge applied to unmanned aerial vehicle telemetry receiving
Big potentiality.
Simulated radiation unit, the unmanned plane frequency range for keeping its resonance frequency covering 1400MHz legal, radiating element length are equivalent
About half wavelength covers copper radiation minor matters in dielectric-slab top and bottom.
If Fig. 4 is the standing-wave ratio analogous diagram of telemetering antenna, standing-wave ratio (SWR) full name is voltage standing wave ratio (VSWR).In nothing
In line telecommunication, the impedance mismatch or antenna of antenna and feeder line and the impedance mismatch of sender, high-frequency energy will be in day
Line generation back wave, back wave and incidence wave converge generation standing wave in antenna-feeder system.In order to characterize and measure in antenna-feeder system
Forward wave and the case where back wave in stationary wave characteristic, that is, antenna, establishes " standing-wave ratio " this concept, actually there is always
Reflection, so standing-wave ratio is always greater than 1.Standing-wave ratio is to examine the foundation of feeder line efficiency of transmission, and voltage standing wave ratio is less than
1.5.Voltage standing wave ratio is excessive, will shorten communication distance, and reflection power will return to power amplifier in transmitter part, and be easy to burn out power amplifier
Pipe influences communication system normal work.As seen from Figure 4, in 1400MHz~1500MHz, antenna standing wave all < 1.5dB, both met
The unmanned plane frequency range that Ministry of Industry and Information delimit, also can satisfy the use of Unmanned Aerial Vehicle Data Link signal.
Fig. 5 and Fig. 6 is the face telemetering antenna H and the face E benefit directional diagram respectively, it is seen that the 24 array element highests that telemetering antenna uses can
To reach the gain of 19dBi.If any other systems demand more high-gain, this programme can be used, mentioned by increasing array element quantity
Rise antenna gain.
The above description is only an embodiment of the present invention, and it is not intended to limit the protection scope of the present invention, all to utilize the present invention
Equivalent structure transformation made by specification and accompanying drawing content, is applied directly or indirectly in other relevant technical fields, and wraps
It includes in scope of patent protection of the invention.
Claims (10)
1. a kind of ground telemetering antenna, it is characterised in that: including antenna house (2), telemetering antenna (1), radio frequency connector (6), penetrate
Frequency cable and fixed column (4)；The telemetering antenna (1) includes dielectric-slab (10), several radiating elements (9) and feeding network
(11), wherein feeding network (11) include four parallel arrangements lateral feeder line (13) and with four lateral feeder line (13) each midpoints
The longitudinal feeder line (14) to intersect vertically, every lateral feeder line (13) and longitudinal feeder line (14) point of intersection are equipped with impedance transformation (7)；
Longitudinal feeder line midpoint is equipped with feeding point (12), and radiating element is distributed along the lateral feeder line of each parallel arrangement, and about longitudinal feeder line
Symmetrically；Radiating element (9) and feeding network (11) cover copper in dielectric-slab (10)；The radiating element (9) includes dipole
Two minor matters, the corresponding copper that covers of described two minor matters constitute the two-sided array antenna of dipoles in dielectric-slab (10) two sides；Telemetering day
In antenna house (2), dielectric-slab (10) offers through-hole (8) line (1) level packages, and fixed column (4) passes through through-hole (8) for medium
Plate (10) is fixed in antenna house；Radio frequency connector (6) is fixed in antenna house (2), and radio frequency electrical cable one end connects radio frequency and connects
It connects device (6), the other end connects feeding point (12).
2. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: the minor matters of partial radiation unit (9) are bent
90°。
3. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: antenna house (2) bottom be additionally provided with it is distant
The antenna back panel (5) of observation line (1) parallel arrangement, offers through-hole, dielectric-slab (10) and antenna back panel on antenna back panel (5)
(5) through-hole can be such that fixed column (4) penetrate through；The distance of antenna back panel (5) to telemetering antenna (1) is a quarter of its wavelength.
4. a kind of ground telemetering antenna as claimed in claim 3, it is characterised in that: the antenna back panel (5) is aluminium sheet.
5. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: the dielectric-slab (10) is the FR4 medium of 1mm
Plate.
6. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: the feeding network (11) is two-sided parallel band
Line feeding network, on the two sides of dielectric-slab (10), the corresponding feeder line that carries out covers copper.
7. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: radio frequency electrical cable is 50 ohm coaxial lines.
8. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: horizontal line feeder line (13) is presented in radiating element (9)
Impedance at power port is 50 ohm.
9. a kind of ground telemetering antenna as described in claim 1, it is characterised in that: the radio frequency connector (6) is SMA or N-type
Band flange radio frequency.
10. a kind of ground telemetering antenna platform, it is characterised in that: including tripod turntable, and be placed on tripod turntable
Such as the described in any item ground telemetering antennas of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910355275.XA CN110137692A (en) | 2019-04-29 | 2019-04-29 | A kind of ground telemetering antenna and platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910355275.XA CN110137692A (en) | 2019-04-29 | 2019-04-29 | A kind of ground telemetering antenna and platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110137692A true CN110137692A (en) | 2019-08-16 |
Family
ID=67575705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910355275.XA Pending CN110137692A (en) | 2019-04-29 | 2019-04-29 | A kind of ground telemetering antenna and platform |
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| Country | Link |
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| CN (1) | CN110137692A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689486Y (en) * | 2004-04-07 | 2005-03-30 | 顾志忠 | Antenna of radiating array telecommunicating base station with high-power microwave |
| CN2919564Y (en) * | 2005-12-24 | 2007-07-04 | 烟台高盈科技有限公司 | Broadband radiated element and broadband mobile communication antenna |
| CN201654563U (en) * | 2009-12-25 | 2010-11-24 | 中国科学院沈阳自动化研究所 | Portable antenna automatic tracking system for UAV |
| CN102394359A (en) * | 2011-06-21 | 2012-03-28 | 中国兵器工业第二○六研究所 | Multilayer micro-strip flat-plate array antenna with symmetric beams |
| CN105870612A (en) * | 2016-03-31 | 2016-08-17 | 国鹰航空科技有限公司 | Broadband compact type microstrip array antenna |
| CN107112623A (en) * | 2016-11-24 | 2017-08-29 | 深圳市大疆创新科技有限公司 | Antenna module and unmanned vehicle |
| US20170331197A1 (en) * | 2016-05-10 | 2017-11-16 | Cubtek Inc. | Inset type feed antenna structure |
-
2019
- 2019-04-29 CN CN201910355275.XA patent/CN110137692A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689486Y (en) * | 2004-04-07 | 2005-03-30 | 顾志忠 | Antenna of radiating array telecommunicating base station with high-power microwave |
| CN2919564Y (en) * | 2005-12-24 | 2007-07-04 | 烟台高盈科技有限公司 | Broadband radiated element and broadband mobile communication antenna |
| CN201654563U (en) * | 2009-12-25 | 2010-11-24 | 中国科学院沈阳自动化研究所 | Portable antenna automatic tracking system for UAV |
| CN102394359A (en) * | 2011-06-21 | 2012-03-28 | 中国兵器工业第二○六研究所 | Multilayer micro-strip flat-plate array antenna with symmetric beams |
| CN105870612A (en) * | 2016-03-31 | 2016-08-17 | 国鹰航空科技有限公司 | Broadband compact type microstrip array antenna |
| US20170331197A1 (en) * | 2016-05-10 | 2017-11-16 | Cubtek Inc. | Inset type feed antenna structure |
| CN107112623A (en) * | 2016-11-24 | 2017-08-29 | 深圳市大疆创新科技有限公司 | Antenna module and unmanned vehicle |
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Application publication date: 20190816 |