CN112670718B - Pure water short backfire antenna with reconfigurable working mode - Google Patents
Pure water short backfire antenna with reconfigurable working mode Download PDFInfo
- Publication number
- CN112670718B CN112670718B CN202011210369.7A CN202011210369A CN112670718B CN 112670718 B CN112670718 B CN 112670718B CN 202011210369 A CN202011210369 A CN 202011210369A CN 112670718 B CN112670718 B CN 112670718B
- Authority
- CN
- China
- Prior art keywords
- water
- matching
- pure water
- reflector
- reconfigurable
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a work mode reconfigurable pure water short backfire antenna, which comprises: the device comprises a main reflector, an auxiliary reflector, a pure water inner edge ring, a pure water outer edge ring, a coaxial probe, a metal cone for impedance matching, a water column for axial matching and a water column for normal matching; the main reflector, the inner edge ring and the outer edge ring are transparent resin wafers and circular rings which are provided with interlayers, are integrally nested together like a shaft, and share two circular waveguides with different diameters on the bottom surface; the secondary reflector is a transparent resin wafer provided with an interlayer, is arranged above the opening of the circular waveguide, and the center of the secondary reflector is opposite to the main reflector; the coaxial probe is arranged at the bottom of the transparent resin water storage container and at the center of the main reflector and used for carrying out coaxial feed; the metal cone is arranged on the coaxial probe; the water column for axial matching and the water column for normal matching are mutually vertical transparent resin water pipes and are arranged on the metal cone; the invention has the advantages of reconfigurable working mode, reconfigurable directional diagram, reconfigurable frequency, high transparency, simple design and easy processing.
Description
Technical Field
The invention belongs to the field of microwave antennas, and particularly relates to a pure water short backfire antenna with a reconfigurable working mode.
Background
In recent years, the idea of designing antennas using liquid materials has attracted much attention due to their easily reconfigurable characteristics, and pure water has been used in many applications due to its common characteristics of easy availability, colorless transparency, and the like. The design and application of water antennas have become a hot spot in antenna engineering research. The water antenna has the characteristics of low price, simple structure, easy processing, high transparency, reconfigurability and the like.
There have recently emerged a number of water antenna designs, of which the group of the university of hong Kong City, the university of land and precious culture professor, in the paper "A water dense dielectric patch antenna", A Wireless and optical transparent water patch antenna with a broad radiation pattern ", et al, proposes to construct the antenna with a thin layer of water. Wherein the pure water part has more effect of blocking energy rather than radiation. Finally, the pure water patch antenna is formed, extremely high transparency and radiation efficiency are obtained, but the gain is low, and the pure water patch antenna does not have the reconfigurable characteristic.
Disclosure of Invention
The invention aims to provide a pure water short backfire antenna with a reconfigurable working mode.
The technical solution for realizing the purpose of the invention is as follows: a work mode reconfigurable pure water short backfire antenna comprises: the device comprises a main reflector, an outer ring, a pure water inner ring, an auxiliary reflector, a coaxial probe, a metal cone for impedance matching, a water column for axial matching and a water column for normal matching; the main reflector, the outer ring and the pure water inner ring form a coaxial nested circular open waveguide, the main reflector is the bottom surface of the circular open waveguide, the main reflector, the outer ring and the pure water inner ring are all made of transparent resin, an interlayer is arranged on the inner side of the main reflector, the outer ring and the pure water inner ring are used for water injection, the auxiliary reflector is a wafer made of transparent resin, the auxiliary reflector is arranged above the opening of the axial nested circular open waveguide, and the interlayer is arranged on the inner side of the auxiliary reflector and used for water injection; the coaxial probe is arranged in the center of the bottom of the main reflector and used for carrying out coaxial feed; the metal cone is arranged on the coaxial probe and used for impedance matching; axial for the matching water column along circle opening waveguide axial setting on the metal cone, normal direction for the matching water column along circle opening waveguide normal direction setting on the metal cone, and axial for the matching water column link to each other with normal direction for the water column afterbody, and the junction is located the metal cone for impedance matching and adjustment antenna mode.
Preferably, the thicknesses of the interlayer on the inner side of the main reflector, the interlayer on the outer side ring, the interlayer on the inner side of the pure water and the interlayer on the inner side of the secondary reflector are the same.
Preferably, the working mode of the antenna is changed by injecting water into the matching water column and the normal matching water column respectively and adjusting the water level height in the outer ring and the pure water inner ring.
Preferably, all interlayer water wall thicknesses t is 2 mm; all transparent resin wall thickness t0＝2mm。
Preferably, the diameter of the main reflector is D m150 mm; the height of the outer ring is W equal to 50 mm; the height of the inner ring is S220mm, inner diameter d1＝60mm。
Preferably, the sub-reflector has a diameter Ds50mm, distance S from the main reflector1＝50mm。
Preferably, the coaxial probe inner diameter dp1.2mm, outer diameter dt＝4mm。
Preferably, the diameter d of the bottom surface of the metal conep1.2 mm; median diameter dc9 mm; diameter d of the top surface 25 mm; the height of the bottom surface from the middle surface is h16 mm; the middle surface is h away from the top surface2＝4mm。
Preferably, the axial matching being by means of water jetsDiameter d 25 mm; length h3The system is adjustable according to reconfigurable requirements; diameter d of water column for normal direction matching25 mm; the length l is 15 mm.
Compared with the prior art, the invention has the following remarkable advantages:
1. the directional diagram can be reconstructed: the high dielectric constant characteristic of pure water is utilized to replace the traditional metal wall to block energy, and meanwhile, the water fluidity is utilized to make up the defect of fixed structure of the traditional short backfire antenna and solve the reconfigurable problem of the short backfire antenna;
2. high transparency: the high transparency characteristic of pure water is utilized, and transparent resin is matched to be used as a water storage container, so that the whole antenna has extremely high transparency.
3. The structure is simple: the coaxial probe is directly inserted for feeding, so that the feeding structure is simple; the whole antenna is of a symmetrical structure and is easy to process.
The invention is described in further detail below with reference to the figures and the detailed description.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of a reconfigurable pure water short backfire antenna with a working mode
Fig. 2 is a top view of the short backfire antenna of the present invention.
Fig. 3 is a side view of the short backfire antenna of the present invention.
Fig. 4 is a schematic diagram of a pen-shaped beam pattern of the short backfire antenna in a first working state, i.e. when water is injected into the interlayer between the inner ring and the outer ring and normal water column is injected.
Fig. 5 is a schematic diagram of a cone-shaped beam pattern of the short backfire antenna in a first working state, namely, water is injected into an interlayer between the inner ring and the outer ring and water is injected into an axial water column.
Fig. 6 is a schematic diagram of the short backfire antenna of the present invention in a second working state, namely, when the interlayer water of the inner ring and the outer ring is pumped and injected into the interlayer water of the axial water column.
Fig. 7 is an electric field distribution diagram of the antenna in the first operation state of the pencil beam mode shown in fig. 4.
Fig. 8 is an electric field distribution diagram of the antenna in the cone beam mode in the first operation state shown in fig. 5.
Fig. 9 is a diagram of the electric field distribution of the antenna in the second operating state shown in fig. 6.
Fig. 10 is a simulated and measured S-parameter for a first operating condition of the present invention.
Fig. 11 is a simulated and measured gain curve for a first operating condition of the present invention.
Fig. 12 is a simulated and measured pattern for a first operating state of the pencil beam mode of the present invention.
Fig. 13 is a simulated and measured pattern for cone beam mode in a first operating state of the invention.
Fig. 14 is a simulated and measured S-parameter for a second operating condition of the present invention.
Fig. 15 is a simulated and measured gain curve for a second operating condition of the present invention.
Fig. 16 is a simulated and measured directional pattern for a second operating condition of the present invention.
Detailed Description
As shown in fig. 1 to 6, an operation mode reconfigurable pure water short backfire antenna comprises: the device comprises a main reflector, an auxiliary reflector, an inner edge ring, an outer edge ring, a coaxial probe, a metal cone for impedance matching, a water column for axial matching and a water column for normal matching; the pure water components are formed by water plasticity by injecting water into the transparent resin water storage container; the main reflector, the pure water inner edge ring and the pure water outer edge ring are transparent resin wafers and circular rings which are provided with interlayers, are integrally nested together like a shaft, and share two circular waveguides with different diameters on the bottom surface; the secondary reflector is a transparent resin wafer provided with an interlayer and is arranged above the opening of the circular waveguide, a Teflon support column can be introduced for supporting in practical application, and the center of the secondary reflector corresponds to the main reflector; the coaxial probe is arranged at the bottom of the transparent resin water storage container and at the center of the main reflector and is used for carrying out coaxial feed; the metal cone is arranged on the coaxial probe and used for impedance matching; the water column for axial matching and the water column for normal matching are a pair of mutually perpendicular transparent resin water pipes and are arranged on the metal cone.
In some embodiments the coaxial probe 2 is a standard SMA contact centred in the centre of the main reflector and the probe is passed through the main reflector into the inner feed surrounded by the inner rim.
In a further embodiment, the thicknesses of the interlayers in the transparent resin water storage container of the main reflector, the sub-reflector, the inner edge ring and the outer edge ring are all the same.
In a further embodiment, the feeding mode is changed by injecting water into the axial water column and the normal water column respectively, so that the working state of the antenna is switched, and the radiation pattern is changed to switch between the pen-shaped beam and the cone-shaped beam; and the height of the water level in the outer ring, the interlayer of the inner ring and the axial water column is controlled, and the working frequency of the antenna is changed.
In a further embodiment, the interlayer thickness t is 2 mm; the wall thickness t of the transparent resin water storage container0＝2mm。
In a further embodiment, the diameter D of the main reflectorm150mm, sub-reflector diameter Ds50mm from the main reflector S1＝50mm
In a further embodiment, the outer edge ring height W is 50 mm; the diameter is equal to the diameter of the main reflector; inner ring height S220mm, diameter d1＝60mm。
In a further embodiment, the coaxial probe inner diameter dp1.2mm, outer diameter dt＝4mm。
In a further embodiment, the diameter of the bottom surface of the metal cone is equal to the inner diameter of the coaxial probe; median diameter dc9 mm; diameter d of the top surface 25 mm; height h from bottom to middle16 mm; height h from middle surface to top surface2＝4mm。
The coaxial probe 5 extends into the space enclosed by the water wall for feeding, the thickness of the water layer is adjusted to play a role similar to a reflecting plate, the constraint on electromagnetic waves is formed, and the water wall replaces the metal reflector and the side ring in the traditional short backfire antenna. The water column is used for forming an adjustable feed structure, so that different electric field modes are excited.
As shown in FIGS. 7 and 8, the water is used for matching the normal direction and the axial direction respectivelyColumn filling, i.e. electric field distribution pattern of pencil and cone beam mode in working state 1. It can be seen that in the pencil beam mode, HE is excited in the antenna11A mode, thereby forming a pencil beam; in cone beam mode, a centrosymmetric TM is excited in the antenna01The mode, thereby forming a cone-shaped beam.
In order to verify the antenna performance, the present invention was subjected to a process test. Fig. 10 is a simulated and measured S-parameter for a first operating condition of the invention. In the pencil beam mode, the-10 dB impedance bandwidth at the center frequency of 3.85GHz is 70.1%, and in the cone beam mode, the-10 dB impedance bandwidth at the center frequency of 4.15GHz is 74.7%. The simulation and test results are somewhat slightly off due to machining errors. Fig. 11 is a plot of simulated and tested gain versus frequency for the first mode of operation of the present invention. The maximum gain in pencil beam mode is 11.8dBi and the maximum gain in cone beam state 2 is 7.8 dBi. Fig. 12 and 13 are simulated and measured patterns at 4GHz in a first operating state of the invention. The antenna gain in the pencil beam mode is a pencil beam, and the antenna pattern in the cone beam mode is a cone beam. The test result is basically consistent with the simulation result. Therefore, the invention has good directional diagram reconfigurable performance in the first working state.
FIG. 14 shows the injection of axially matched water columns at different heights h according to a second operating condition of the present invention3S parameter of simulation and measurement at water level of (h)3The center working frequency is respectively 4.5GHz, 4.0GHz and 3.6GHz when the thickness is respectively 7mm, 10mm and 14 mm. FIG. 15 shows a second operating condition h of the present invention3The maximum gain is 2.7GHz, and the frequency is always over 75 percent. FIG. 16 shows the second operating condition h of the present invention3The antenna gain in this operating state is similar to a conventional monopole antenna, as simulated and measured pattern at 4GHz at 10 mm. It can be seen that the present invention has good frequency reconfigurable performance in the second operating state.
The invention has reconfigurable and high-transparency performance.
The invention utilizes the water layer to block energy and strengthen guidance, thereby improving the directionality; different directions of matched water columns are introduced to excite different modes of electric fields, so that the directional diagram can be reconstructed; and frequency reconfiguration is realized by changing the length of the matched water column.
Claims (9)
1. The utility model provides a mode restructural pure water short backfire antenna which characterized in that includes: the device comprises a main reflector (1), an outer edge ring (2), an inner edge ring (3), an auxiliary reflector (4), a coaxial probe (5), an impedance matching metal cone (6), an axial matching water column (7) and a normal matching water column (8); the coaxial nested circular open waveguide is characterized in that the main reflector (1), the outer edge ring (2) and the inner edge ring (3) form a coaxial nested circular open waveguide, the main reflector (1) is the bottom surface of the circular open waveguide, the main reflector (1), the outer edge ring (2) and the inner edge ring (3) are all made of transparent resin, an interlayer is arranged on the inner side of the main reflector for water injection, the auxiliary reflector (4) is a wafer made of transparent resin and arranged above an opening of the coaxial nested circular open waveguide, and an interlayer is arranged on the inner side of the auxiliary reflector for water injection; the coaxial probe (5) is arranged in the center of the bottom of the main reflector (1) and used for carrying out coaxial feeding; the metal cone (6) is arranged on the coaxial probe (5) and is used for impedance matching; axial for the matching water column (7) along circle opening waveguide axial setting on metal cone (6), normal direction for the matching water column (8) along the radial setting on metal cone (6) of circle opening waveguide, and axial for the matching water column (7) and normal direction for the matching water column (8) afterbody link to each other, and the junction is located metal cone (6) for impedance matching and adjustment antenna mode.
2. The operational mode reconfigurable pure water short backfire antenna according to claim 1, wherein the thicknesses of the inner interlayers of the main reflector (1), the outer edge ring (2), the inner edge ring (3) and the sub-reflector (4) are the same.
3. The operation mode reconfigurable pure water short backfire antenna according to claim 1, characterized in that the operation mode of the antenna is changed by injecting water into the water columns (7) for axial matching and the water columns (8) for normal matching and adjusting the water level heights in the outer ring (2) and the inner ring (3).
4. The operation mode reconfigurable pure water short backfire antenna according to claim 1, wherein all the interlayer water wall thicknessest= 2 mm; all transparent resin wall thicknesst 0 = 2 mm。
5. The operational mode reconfigurable pure water short backfire antenna according to claim 1, characterized in that said main reflector (1) has a diameter ofD m= 150 mm; the height of the outer ring (2) isW= 50 mm; the height of the inner edge ring (3) is as high asS 2= 20mm, inner diameter ofd 1= 60 mm。
6. The operational mode reconfigurable pure water short backfire antenna according to claim 1, characterized in that the diameter of the sub-reflector (4) isD s= 50mm, at a distance from the main reflector (1)S 1 = 50 mm。
7. The operational mode reconfigurable pure water short backfire antenna according to claim 1, characterized in that the coaxial probe (5) has an inner diameterd p= 1.2mm, outside diameterd t = 4 mm。
8. The operation mode reconfigurable pure water short backfire antenna according to claim 1, wherein the diameter of the bottom surface of the metal cone (6)dx= 1.2mm, median diameterd c = 9 mm; diameter of top surfaced 2= 5 mm; the bottom surface is higher than the middle surfaceh 1= 6 mm; the middle surface is higher than the top surfaceh 2 = 4 mm。
9. The operational mode reconfigurable pure water short backfire antenna according to claim 1, characterized in that the diameter of the water column (7) for axial matchingd 3 = 5 mm; length ofh 3The system is adjustable according to reconfigurable requirements;diameter of water column (8) for normal matchingd 4= 5 mm; length ofl = 15 mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210369.7A CN112670718B (en) | 2020-11-03 | 2020-11-03 | Pure water short backfire antenna with reconfigurable working mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210369.7A CN112670718B (en) | 2020-11-03 | 2020-11-03 | Pure water short backfire antenna with reconfigurable working mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112670718A CN112670718A (en) | 2021-04-16 |
| CN112670718B true CN112670718B (en) | 2022-05-13 |
Family
ID=75403318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011210369.7A Active CN112670718B (en) | 2020-11-03 | 2020-11-03 | Pure water short backfire antenna with reconfigurable working mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112670718B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100771819B1 (en) * | 2006-03-03 | 2007-10-30 | 삼성전기주식회사 | Frequency tunable liquid antenna |
| US8593362B2 (en) * | 2010-05-27 | 2013-11-26 | Orbit Communication System Ltd. | Multi band telemetry antenna feed |
| CN103094666B (en) * | 2012-12-21 | 2015-04-08 | 西安电子工程研究所 | Millimeter wave omnidirectional circularly polarized antenna based on circularly polarized loudspeaker |
| US9318810B2 (en) * | 2013-10-02 | 2016-04-19 | Wineguard Company | Ring focus antenna |
| CN107834168B (en) * | 2017-10-17 | 2019-09-13 | 南京理工大学 | A kind of cone pencil type beam reconfigurable antenna |
| CN110190377B (en) * | 2019-04-15 | 2020-04-24 | 南京航空航天大学 | Directional diagram reconfigurable liquid antenna |
-
2020
- 2020-11-03 CN CN202011210369.7A patent/CN112670718B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112670718A (en) | 2021-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhou et al. | A novel high-directivity microstrip patch antenna based on zero-index metamaterial | |
| CN106384883B (en) | Metamaterial cross dipole circularly polarized antenna | |
| CN103337710B (en) | Wideband low sidelobe lens antenna based on novel artificial electromagnetic material | |
| CN109103604B (en) | High-gain wide-angle scanning lens antenna based on step medium | |
| CN111146572B (en) | Folding circular polarization reflective array antenna | |
| CN114389042A (en) | X-waveband low-profile wide-shaped antenna | |
| Jin et al. | Gain improvement of a microstrip patch antenna using metamaterial superstrate with the zero refractive index | |
| Huang et al. | A wideband water patch antenna with polarization diversity | |
| CN112670718B (en) | Pure water short backfire antenna with reconfigurable working mode | |
| CN106816717B (en) | Conical beam circularly polarized antenna | |
| Li et al. | A low-profile dual-band coaperture monopolar antenna based on cross-layer folded structure | |
| Zhao et al. | A high gain patch antenna using negative permeability metamaterial structures | |
| CN112234345B (en) | Pure water horn antenna with reconfigurable directional diagram | |
| Shrestha et al. | 3D printable phase transformation meta-structure for resonant cavity antennas | |
| Michishita et al. | Metamaterial radome composed of negative refractive index lens for mobile base station antennas | |
| Zhou et al. | A low-profile and broadband conical antenna | |
| CN206595384U (en) | The aerial array of high power low profile helical antenna and its composition | |
| Ghattas et al. | Optimization of dielectric rod antenna design in millimeter wave band for wireless communications | |
| Wu et al. | A novel focusing lens conical horn antenna loaded with dielectric | |
| Zhu et al. | Design of shaped dielectric lens antenna for millimeter wave wind profile radar | |
| Huang et al. | A hemisphere dielectric lens for high directivity with narrow beam and low side lobe level | |
| Li et al. | Design and analysis of high gain dual-polarized dipole antenna based on partially reflective metasurface | |
| Zhang et al. | A High-gain Wideband Sinuous Antenna Loaded with Lens and Cone-shaped Reflective Backplate | |
| CN108808249A (en) | The conformal Cassegrain antenna in convex surface based on super surface | |
| Wang et al. | Wideband Omnidirectional Cone-Shaped Monopole Antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |