CN206180080U - Flexible collapsible liquid helical antenna who regulates and control - Google Patents
Flexible collapsible liquid helical antenna who regulates and control Download PDFInfo
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- CN206180080U CN206180080U CN201621226820.3U CN201621226820U CN206180080U CN 206180080 U CN206180080 U CN 206180080U CN 201621226820 U CN201621226820 U CN 201621226820U CN 206180080 U CN206180080 U CN 206180080U
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- helical antenna
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Abstract
The utility model provides a flexible collapsible liquid helical antenna who regulates and control, including being liquid antenna and the power feeding terminal that helical structure set up, the liquid antenna includes hollow hose and injection the inside conducting solution body of hose, power feeding terminal includes the microstrip base plate and sets up coaxial joint on the microstrip base plate, be equipped with in the coaxial joint with the probe of the conducting solution body intercommunication in the liquid antenna. Use the utility model discloses a flexible collapsible liquid helical antenna who regulates and control, the effect is: the structure is retrencied, the liquid antenna is helical structure and sets up, can realize horizontal qxcomm technology, axial and the radiation of top circumferencial direction to one side, satisfy the demand of all -round radiation in the actual life, and the radiance is good, can realize the regulation and control of manual performance, the liquid antenna adopts the combination of the hollow hose and the conducting solution body, and is flexible good, and light in weight is collapsible, is convenient for install and accomodate.
Description
Technical field
This utility model is related to communication technique field, and in particular to a kind of regulatable liquid spiral day of flexible foldable
Line.
Background technology
In prior art, common wireless system includes radar, communication, navigation etc., and its antenna is typically metal material, or
The mixed structure of metal and solid dielectric.Existing liquid antenna mainly includes two classes：
The first, liquid metal antenna, the performance boost of this antenna and technology maturity are highly dependent on liquid metal
The research and development of material, its method for designing is close to common metal antenna.Currently, room temperature liquid metal type and quantity have
Limit, still in phase of basic research.
Secondth, nonmetallic liquid antenna, this kind of antenna is mainly using sea water, saline, pure water or other are organic and inorganic
Liquid realizes antenna structure as radiant body, design.Through the Literature Consult of the nonmetallic liquid antenna to having delivered both at home and abroad,
Obtain what is studied at present, mainly include：(1) with water pumper, water pump extracting seawater, eject, form parabola, semi-circular arc
Shape or the whiplike element antenna of upright single armed, are mainly used in naval vessel temporary wireless communication under marine environment；(2) replace passing with liquid
A part of structure of system metal antenna, realizes the mixing of liquid and solid, such as liquid micro-strip paster antenna, and substrate is that solid is situated between
Matter, its patch portion is replaced by the liquid being mounted in plastic casing；Or, realize that liquid is loaded, to virgin metal antenna, add one
Partially liq structure, improves the performance in terms of certain；(3) the static liquid antenna of conventionally form.Mainly include：Liquid medium resonance
Antenna, liquid monopoles antenna etc..
Antenna present in prior art mainly has following weak point：(1) weak point of metal antenna mainly has：Electricity
The usual not restructural of gas performance, user can not or cannot adjust during use, and weight is larger, and price is higher；(2) using water pump
Sea water antenna volume is big, and energy consumption is big；(3) deficiency of cloth fabric antenna, it is weak to be primarily due to its electric conductivity, causes radianting capacity
Weak, radiation gain is low, and efficiency is low, and energy loss is larger；(4) deformed Oscillators antenna and magnetic loop antenna, and button antenna and skin
Bracelet antenna, has individual common feature to be that physical size is little, and electric size is limited, and radiation directivity is weaker, radiates and receive radio
Energy is not enough concentrated.
In sum, be badly in need of a kind of structure is simplified, easy to carry, angle of radiation is extensive and performance is good liquid antenna with
Solve problems of the prior art.
Utility model content
This utility model purpose is that a kind of structure of offer is simplified, easy to carry, angle of radiation scope is big and performance is good
The regulatable liquid helical antenna of flexible foldable, concrete technical scheme is as follows：
A kind of regulatable liquid helical antenna of flexible foldable, liquid antenna including helically structure setting and with
The feed end of liquid antenna connection；
The liquid antenna includes hollow flexible pipe and the conducting liquid of the injection inside hose；
The feed end includes micro-strip substrate and the coaxial fitting being arranged on the micro-strip substrate；The coaxial fitting
Inside it is provided with the probe connected with the conducting liquid in the liquid antenna；
One end of the liquid antenna is connected with coaxial fitting, and its other end is provided with the sealing for sealing conducting liquid
Part.
Preferred in above technical scheme, also including hollow support pipe, one end of the support pipe is fixed on institute
State on micro-strip substrate, the liquid antenna helically rises shape and is wrapped on the outer wall of the support pipe.
Preferred in above technical scheme, the central axis upright of the support pipe is in the upper surface of the micro-strip substrate
Arrange, and the central point of the upper surface of the micro-strip substrate is located on the central axis of the support pipe；The coaxial fitting
Arrange through the micro-strip substrate, and its outer wall for being close to the support pipe is arranged.
It is preferred in above technical scheme, the internal diameter of the support pipe, external diameter and length be respectively 8mm, 10mm and
185mm；The material of the support pipe is rigid plastics.
Preferred in above technical scheme, the material of the micro-strip substrate is Rogers RT5880, its length and width and high score
Not Wei 100mm, 70mm and 1.2mm, its dielectric constant be 2.2.
Preferred in above technical scheme, the liquid antenna includes vertical section and the spiral being sequentially connected in series from the bottom to top
Section, the lower end of the vertical section is connected with the coaxial fitting, and the upper end of the vertical section is connected with the lower end of the spiral section；
The height of the vertical section is 17mm；In the spiral section：Spiral number of turns are 8, and pitch is 21mm.
Preferred in above technical scheme, the diameter of the vertical section and spiral section is 25mm.
Preferred in above technical scheme, the sealing member includes clip or sealing plug.
Using the technical solution of the utility model, have the advantages that：
(1) the regulatable liquid helical antenna of flexible foldable of the present utility model includes the liquid of helically structure setting
Antenna and feed end；The liquid antenna includes hollow flexible pipe and the conducting liquid of the injection inside hose；It is described
Feed end includes micro-strip substrate and the coaxial fitting being arranged on the micro-strip substrate；Be provided with the coaxial fitting with it is described
The probe of the conducting liquid connection in liquid antenna.The regulatable liquid helical antenna structure of flexible foldable of the present utility model
Simplify；Helically structure setting, the radiation of achievable horizontal omnidirectional, axial direction and oblique upper circumferencial direction of liquid antenna, meets
The demand of Omnidirectional radiation in actual life, and radiance is good；Liquid antenna adopts the group of hollow flexible pipe and conducting liquid
Close, it is flexible, it is foldable, it is easily installed and receives；Selected micro-strip substrate can adopt following structure：Only bottom surface is conductive, with
Support tube and the upper surface of conducting liquid place flexible pipe contact are dielectric insulation materials.
(2) hollow support pipe is also included in this utility model, one end of the support pipe is fixed on the micro-strip
On substrate, the liquid antenna is spirally wrapped around on the outer wall of the support pipe.Support that pipe is used to support liquid day
Line, is easily installed and uses.The position relationship of micro-strip substrate, support pipe and coaxial fitting is arranged, and feedback is enabled to first
Electricity point obtains equal diameter structure positioned at the edge of spiral upright projection disc；Next can ensure that firm feed connection is installed；
It is again able to provide good metallic reflection plane for fluid radiation structure, improves the forward radiation ability of antenna.
(3) internal diameter of support pipe, external diameter and length are respectively 8mm, 10mm and 185mm in this utility model；Described
The material for holding round pipe is rigid plastics, and material is readily available, and is easy to make.
(4) material of micro-strip substrate is Rogers RT5880 in this utility model, its length and width and it is high be respectively 100mm,
70mm and 1.2mm, its dielectric constant is 2.2, meets the demand in terms of this utility model liquid Antenna Impedance Matching, improves antenna
Overall radiation efficiency.
(5) liquid antenna described in this utility model includes vertical section and the spiral section being sequentially connected in series from the bottom to top, on
End spiral can play electromagnetic wave guiding function, and the forward radiation ability of antenna is strengthened successively.The size rule of vertical section and spiral section
Lattice are designed, directly related with the operation wavelength of antenna.Particularly screw diameter and the ratio of wavelength, decide aerial radiation direction
Property, the final distribution for affecting electromagnetic wave in space.And the pitch of antenna affects the electromagnetic coupled between adjoining spiral, to radiation side
Tropism also has a certain impact.
(6) top of liquid antenna is sealed by the sealing member comprising clip or sealing plug in this utility model, portion
Part is readily available, it is ensured that liquid antenna is normally used.
In addition to objects, features and advantages described above, this utility model also has other purposes, feature and excellent
Point.Below with reference to figure, this utility model is described in further detail.
Description of the drawings
The accompanying drawing for constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used to explain this utility model, does not constitute to improper restriction of the present utility model.In accompanying drawing
In：
Fig. 1 is the structural representation of the regulatable liquid helical antenna of flexible foldable of this utility model preferred embodiment 1
Figure；
Fig. 2 is the sectional drawing of liquid antenna in Fig. 1；
Fig. 3 is the screw diameter of the regulatable liquid helical antenna of flexible foldable and radiation directivity in embodiment 1
Graph of a relation；
Fig. 4 is the Polar Coordinate Two-dimensional directional diagram of horizontal omnidirectional liquid helical antenna in embodiment 1；
Fig. 5 is the Polar Coordinate Two-dimensional directional diagram of axial radiation fluid helical antenna in embodiment 1；
Fig. 6 is the Polar Coordinate Two-dimensional directional diagram of oblique upper radiation fluid helical antenna in embodiment 1；
Fig. 7 is excitation and impact schematic diagram of the feed probes length to the impedance matching property of liquid helical antenna；
Fig. 8 is impact schematic diagram of the micro-strip dielectric substrate thickness to the impedance matching property of liquid helical antenna；
Fig. 9 is the impact schematic diagram for feeding section liquid radius to the impedance matching of liquid helical antenna；
Figure 10 is the comparison chart of the liquid helical antenna reflection coefficient with simulation result of actual measurement；
Figure 11 is to carry out one of liquid helical antenna Pattern measurement schematic diagram in microwave dark room；
Figure 12 is two that liquid helical antenna Pattern measurement schematic diagram is carried out in microwave dark room；
Wherein, 1, liquid antenna, 1.1, flexible pipe, 1.2, conducting liquid；
2nd, feed end, 2.1, micro-strip substrate, 2.2, coaxial fitting, 2.3, probe；
3rd, support pipe；
A, vertical section, B, spiral section.
Specific embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but this utility model can be according to power
Profit requires that the multitude of different ways for limiting and covering is implemented.
Embodiment 1：
Referring to Fig. 1-2, a kind of regulatable liquid helical antenna of flexible foldable can be carried with, when needs
Take out and install, actual is exactly simple winding.Without when, folding storage is light, is convenient for carrying, it is easy to use.
The regulatable liquid helical antenna of flexible foldable of the present embodiment includes the liquid antenna of helically structure setting
1 and the liquid antenna 1 connection feed end 2 and hollow support pipe 3.
The liquid antenna 1 includes the conducting liquid 1.2 inside hollow flexible pipe 1.1 and the injection flexible pipe 1.1, this
The flexible pipe at place is gum elastic flexible pipe, and its internal diameter and external diameter are respectively 1.5mm and 2.5mm；The conducting liquid 1.2 adopts chlorination
The concentration of sodium solution, wherein Sodium Chloride is 3.5%.
The feed end 2 includes micro-strip substrate 2.1 and the coaxial fitting 2.2 being arranged on the micro-strip substrate 2.1, institute
The one end for stating support pipe 3 is fixed on the micro-strip substrate 2.1, the liquid antenna 1 helically rise shape be wrapped in it is described
On the outer wall of support pipe 3, specifically：The central axis upright of the support pipe 3 is in the upper surface of the micro-strip substrate 2.1
Arrange, and the central point of the upper surface of the micro-strip substrate 2.1 is located on the central axis of the support pipe 3；It is described coaxial
Joint 2.2 is arranged through the micro-strip substrate 2.1, and its outer wall for being close to the support pipe 3 is arranged.The coaxial fitting
The probe 2.3 connected with the conducting liquid 1.2 in the liquid antenna 1 is provided with 2.2.One end of the liquid antenna 1 and institute
State coaxial fitting 2.2 to connect, its other end is provided with the sealing member for sealing the conducting liquid 1.2, and (sealing member includes clip
Or sealing plug).
The internal diameter of the support pipe 3, external diameter and length Hs are respectively 8mm, 10mm and 185mm；The support pipe 3
Material is rigid plastics.
The material of the micro-strip substrate 2.1 is Rogers RT5880, its long Lg, width and high respectively 100mm, 70mm and
1.2mm, its dielectric constant is 2.2.
The liquid antenna 1 includes vertical section A and the spiral section B being sequentially connected in series from the bottom to top, the lower end of vertical section A
It is connected with the coaxial fitting 2.2, the upper end of vertical section A is connected with the lower end of the spiral section B；Vertical section A
Height Hv is 17mm；In the spiral section B：Spiral number of turns are 8, and pitch Ds is 21mm.Vertical section A and spiral section B's is straight
Footpath is 25mm.
The screw diameter and the relation of radiation directivity of the regulatable liquid helical antenna of flexible foldable of the present embodiment
Fig. 3 is referred to, figure upper, middle and lower side is helical antenna schematic diagram, and top is corresponding radiation direction schematic diagram, wherein：D represents diameter,
λ is the wavelength of electromagnetic wave.From left to right, the ratio increase of the two.When ratio is less than 0.18, its radiation is mainly in level side
To, when ratio is between 0.25 and 0.46, main radianting capacity in the surface of helical antenna, when ratio is more than 0.5,
Main lobe subsides, and the Main way of radiation is oblique upper.The regulatable liquid helical antenna direction of flexible foldable of the present embodiment
Figure refers to table 1 with the variation relation of diameter and the ratio of wavelength, the data that this table is provided, with certain universality, it is adaptable to
The helical antenna of the other sizes realized is designed using saline solution, no matter its pitch, screw diameter, spiral number of turns and operating frequency
With operation wavelength how, the law of regularity described in the table is met, with application value.
The regulatable liquid helical antenna directional diagram of the flexible foldable of table 1 is with diameter and the variation relation table of the ratio of wavelength
| Radiation direction | Horizontal omnidirectional | Axially | Oblique upper circumference |
| Diameter (mm) | 25 | 25 | 25 |
| Frequency range (GHz) | <1.2 | 1.2-4.8 | >4.8 |
| Wave-length coverage (mm) | >250 | 62.5-250 | <62.5 |
| Ratio (D/ λ) | <0.1 | 0.1-0.4 | >0.4 |
| Corresponding metal antenna ratio (D/ λ) | <0.18 | 0.25-0.46 | >0.5 |
For the regulatable liquid helical antenna of flexible foldable of the present embodiment, respectively three prescriptions are provided with two-dimensional coordinate
Xiang Tu, Details as Follows：
The Polar Coordinate Two-dimensional directional diagram of the regulatable liquid helical antenna of horizontal omnidirectional flexible foldable refers to Fig. 4, this figure
Show：It is more remote apart from the center of circle, illustrate that radianting capacity is stronger under the angle, four curves come from azimuth and the angle of pitch
Combination, when respectively 0 degree and 90 degree.
The Polar Coordinate Two-dimensional directional diagram of the regulatable liquid helical antenna of end-fire flexible foldable refers to Fig. 5, this
Chart is bright：It is more remote apart from the center of circle, illustrate that radianting capacity is stronger under the angle, four curves come from azimuth and the angle of pitch
Combination, when respectively 0 degree and 90 degree.
The regulatable liquid helical antenna three-dimensional figure of flexible foldable of oblique upper radiation substantially has oblique upper spoke
The characteristics of penetrating, centre is very weak concave point.But it is not so perfect as shown in Fig. 3, this is the feelings that actually can accomplish
Condition.In fact, metal spiral antenna does not accomplish in Fig. 3 so radiation shapes of standard yet.
The regulatable liquid helical antenna Polar Coordinate Two-dimensional directional diagram of flexible foldable of oblique upper radiation refers to Fig. 6, this
Chart is bright：It is more remote apart from the center of circle, illustrate that radianting capacity is stronger under the angle, four curves come from azimuth and the angle of pitch
Combination, when respectively 0 degree and 90 degree.
In the present embodiment technical scheme, excitation and feed probes length Lp are to the impedance matching property of liquid helical antenna
Impact refers to Fig. 7 and Biao 2, and what is be given in figure is reflection coefficient, and matching properties are showed with this in antenna works.Be given respectively
The situation of probe length 2mm, 5mm, 8mm and 12mm.From figure 7, it is seen that with the lengthening of probe, resonant frequency constantly drops
It is low, substantially from 2.5GHz to 2.2,1.9 and 1.7GHz.
Impact of the feed probes length of table 2 to liquid antenna
In the present embodiment technical scheme, impact of the micro-strip dielectric substrate thickness to the impedance matching property of liquid helical antenna
Fig. 8 and Biao 3 is referred to, from Fig. 8 and Biao 3, with the increase of thickness, the thickness from 0.6mm to 2.0mm, the resonance for causing
Frequency is reduced, substantially from 1.75GHz to 1.62GHz.
Impact of the micro-strip dielectric substrate thickness of table 3 to impedance matching property
In the present embodiment, feed impact of the section liquid radius to the impedance matching of liquid helical antenna and refer to Fig. 9 and Biao 4,
It can be seen from Fig. 9 and Biao 4, as radius is from 1mm to 1.5,2 and 2.5mm, resonant frequency reduce (from 2.0GHz to
1.6GHz)。
Table 4 feeds impact of the section liquid radius to matching
| Liquid radius (mm) | 1.0 | 1.5 | 2.0 | 2.5 |
| Mid frequency (GHz) | 2.02 | 1.79 | 1.73 | 1.64 |
| Minimal reflection coefficient (dB) | -21.4 | -23.5 | -17.7 | -15.8 |
| Frequency range (GHz) | 1.51-1.80 | 1.58-1.91 | 1.61-1.99 | 1.83-2.26 |
| Relative bandwidth | 17.5% | 18.9% | 21.1% | 21.0% |
For the regulatable liquid helical antenna of flexible foldable of the present embodiment, using vector network analyzer to flexibility
Foldable regulatable liquid helical antenna carries out impedance matching property test, it is therefore an objective to：Actual test reflection coefficient, for anti-
Reflect impedance matching property.The reflection coefficient of the liquid helical antenna of actual measurement refers to Figure 10 with comparing for simulation result, from figure
Can be seen that in 10：Both results are coincide preferable, and resonant frequency and bandwidth are close to, simply the difference in concrete numerical value, category
In the theoretical nominal error scope with reality.
For the regulatable liquid helical antenna of flexible foldable of the present embodiment, in microwave dark room flexible foldable is carried out
Regulatable liquid helical antenna Pattern measurement, key instrument uses An Li Anritsu companies 37369A vector network analysis
Instrument, coordinates ultra broadband ridged horn antenna (1-12GHz) and horizontal single axle table, completes the technologies such as voltage standing wave ratio, directional diagram
Index test, obtains respectively horizontal and vertical polarised direction data., used as transmitting terminal, flexible foldable can for ridged horn antenna
The liquid helical antenna of regulation and control is positioned on turntable, and used as receiving terminal, two antenna distance 5m are highly consistent, and transmission signal is simultaneously read
Take the S parameter of arrow net.The a width of 40MHz-3.0GHz of calibration tape, refer to Figure 11 (theta be in 90 degree, phi from 0 to 360 spend) and
Figure 12 (phi is in 90 degree, and theta is from 0 to 360 degree), knowable to Figure 11 and Figure 12：Simulation result and measured result connect very much
Closely, and under different parameters configuring condition, operating frequency of antenna is in 1.2GHz-2.6GHz scopes, and relative bandwidth is more than 20%, most
Big value reaches 24.1%, belongs to ultra-wideband antenna.Therefore, absolutely prove that technical solutions of the utility model gained flexible foldable can
The high-quality performance and strong applicability of the liquid helical antenna of regulation and control.
Preferred embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this
For the technical staff in field, this utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (8)
1. the regulatable liquid helical antenna of a kind of flexible foldable, it is characterised in that including the liquid of helically structure setting
Antenna (1) and the feed end (2) being connected with the liquid antenna (1)；
The liquid antenna (1) includes the internal conducting liquid of hollow flexible pipe (1.1) and the injection flexible pipe (1.1)
(1.2)；
The feed end (2) includes micro-strip substrate (2.1) and the coaxial fitting being arranged on the micro-strip substrate (2.1)
(2.2)；The probe connected with the conducting liquid (1.2) in the liquid antenna (1) is provided with the coaxial fitting (2.2)
(2.3)；
One end of the liquid antenna (1) is connected with the coaxial fitting (2.2), and its other end is provided with for sealing the conduction
The sealing member of liquid (1.2).
2. the regulatable liquid helical antenna of flexible foldable according to claim 1, it is characterised in that also including support
Pipe (3), one end of the support pipe (3) is fixed on the micro-strip substrate (2.1), and the liquid antenna (1) is helically
Rise shape to be wrapped on the outer wall of the support pipe (3).
3. the regulatable liquid helical antenna of flexible foldable according to claim 2, it is characterised in that described holds round
The central axis upright of pipe (3) is arranged in the upper surface of the micro-strip substrate (2.1), and the upper table of the micro-strip substrate (2.1)
The central point in face is located on the central axis of the support pipe (3)；The coaxial fitting (2.2) is through the micro-strip substrate
(2.1) arrange, and its outer wall for being close to the support pipe (3) is arranged.
4. the regulatable liquid helical antenna of flexible foldable according to claim 3, it is characterised in that described holds round
Internal diameter, external diameter and the length for managing (3) is respectively 8mm, 10mm and 185mm；The material of the support pipe (3) is rigid plastics.
5. the regulatable liquid helical antenna of flexible foldable according to claim 3, it is characterised in that the micro-strip base
The material of plate (2.1) is Rogers RT5880, its length and width and high respectively 100mm, 70mm and 1.2mm, and its dielectric constant is
2.2。
6. the regulatable liquid helical antenna of flexible foldable according to claim 5, it is characterised in that the liquid day
Line (1) includes the vertical section (A) and spiral section (B) being sequentially connected in series from the bottom to top, and the lower end of the vertical section (A) is coaxial with described
Joint (2.2) connects, and the upper end of the vertical section (A) is connected with the lower end of the spiral section (B)；
The height of the vertical section (A) is 17mm；In the spiral section (B)：Spiral number of turns are 8, and pitch is 21mm.
7. the regulatable liquid helical antenna of flexible foldable according to claim 6, it is characterised in that the vertical section
And the diameter of spiral section (B) is 25mm (A).
8. the regulatable liquid helical antenna of flexible foldable according to claim 1, it is characterised in that the sealing member
Including clip or sealing plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621226820.3U CN206180080U (en) | 2016-11-15 | 2016-11-15 | Flexible collapsible liquid helical antenna who regulates and control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621226820.3U CN206180080U (en) | 2016-11-15 | 2016-11-15 | Flexible collapsible liquid helical antenna who regulates and control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206180080U true CN206180080U (en) | 2017-05-17 |
Family
ID=58683997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621226820.3U Expired - Fee Related CN206180080U (en) | 2016-11-15 | 2016-11-15 | Flexible collapsible liquid helical antenna who regulates and control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206180080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374185A (en) * | 2016-11-15 | 2017-02-01 | 中国人民解放军国防科学技术大学 | Flexible, foldable and adjustable liquid spiral antenna |
-
2016
- 2016-11-15 CN CN201621226820.3U patent/CN206180080U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374185A (en) * | 2016-11-15 | 2017-02-01 | 中国人民解放军国防科学技术大学 | Flexible, foldable and adjustable liquid spiral antenna |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |