CN107706525B - Reconfigurable antenna - Google Patents
Reconfigurable antenna Download PDFInfo
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- CN107706525B CN107706525B CN201710800518.7A CN201710800518A CN107706525B CN 107706525 B CN107706525 B CN 107706525B CN 201710800518 A CN201710800518 A CN 201710800518A CN 107706525 B CN107706525 B CN 107706525B
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- antenna
- cavity
- magnetic
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- electromagnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The invention relates to the technical field of antennas, in particular to a reconfigurable antenna which comprises a plurality of antenna assemblies, wherein each antenna assembly comprises an antenna, a reconfigurable magnet and two electromagnets, each reconfigurable magnet comprises a cavity and a magnetic body, the magnetic bodies are positioned in the cavities, the antenna penetrates through the cavities from the outside, the antenna is disconnected in the cavities, the two electromagnets are respectively positioned on two sides of each cavity, and the arrangement direction of the electromagnets is perpendicular to the arrangement direction of the antenna. The invention places a specific magnetic body in the cavity, the cavity is positioned in the magnetic field formed by the external electromagnet, the movement of the magnetic body in the cavity is controlled by the external magnetic field, the position of the magnetic body is changed, the antenna penetrates into the cavity from the outside, then the antenna is disconnected to form a fracture, and then the antenna penetrates out of the cavity, the two electromagnets are respectively electrified, so that the magnetic body can move back and forth near the position of the fracture of the antenna in the cavity, the connection and disconnection of the antenna are realized, the reconfiguration of the length and the shape of the antenna is conveniently and effectively realized, and the requirements of different environments and application conditions are met.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a reconfigurable antenna.
Background
An antenna is a device used in a radio apparatus to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar, navigation, remote sensing, radio astronomy and the like all utilize electromagnetic waves to transmit information and all rely on antennas to work. In recent years, with the rapid development of radar and communication systems, antennas of various sizes and shapes are required for automobiles, airplanes, ships, and various consumer electronic devices. The traditional solid metal antenna only has a specific shape, and in order to meet the sending and receiving requirements of different radio signals, the traditional solid metal antenna can only be solved by adopting a mode of carrying a plurality of antennas, which undoubtedly increases the manufacturing cost and the occupied space of the antenna.
The shape and height of the antenna directly affect the reception of radio signals. In order to increase the bandwidth of the antenna, i.e. the frequency range over which it operates efficiently, techniques such as using thicker wires, using metal "netcages" to approximate thicker wires, tapering antenna elements (e.g. in feed horns), and single components of multiple antenna integration are commonly employed. The inclination angle of the antenna also affects the transmitting effect of the antenna, for example, the bottom radar antenna is inclined upwards, so that the aerial vehicle at high altitude can receive radio signals conveniently. In addition, the position of the receiving antenna also affects the receiving effect of the signal, and the antenna radiation characteristic of a mobile device such as a mobile phone varies according to the use state of the user.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem that the existing solid metal antenna has a single structure and is difficult to meet application requirements in various environments.
(II) technical scheme
In order to solve the technical problem, the invention provides a reconfigurable antenna which comprises a plurality of antenna assemblies, wherein each antenna assembly comprises an antenna body, a reconfigurable magnet and two electromagnets, each reconfigurable magnet comprises a cavity and a magnetic body, the magnetic bodies are positioned in the cavities, the antenna bodies penetrate through the cavities from the outside and are disconnected in the cavities, the two electromagnets are respectively positioned on two sides of each cavity, and the arrangement direction of the electromagnets is perpendicular to the arrangement direction of the antenna bodies.
Wherein the magnetic body is made of a liquid metal doped with magnetic metal particles.
Wherein the liquid metal is a gallium-indium alloy consisting of 75.5% of gallium and 24.5% of indium, and the magnetic metal particles are iron, cobalt or nickel.
The antenna comprises a plurality of antenna components, wherein the antenna components are connected in series, and the head end and the tail end of each antenna body are sequentially connected along the current flow direction.
The antenna comprises a plurality of antenna bodies, a plurality of antenna assemblies and a plurality of antenna units, wherein the antenna assemblies are connected in parallel, and the head end and the tail end of each antenna body are respectively connected.
The antenna comprises an antenna body and is characterized by further comprising an antenna electric generator, wherein the antenna electric generator is connected with the tail end of the antenna body.
And the outer part of the antenna body and the outer part of the cavity are both provided with a shell.
Wherein, the electromagnet is connected with an external power supply.
(III) advantageous effects
The technical scheme of the invention has the following advantages: the reconfigurable antenna comprises a cavity, a specific magnetic body, an external electromagnet, an antenna body, a magnetic body, a power supply and a power supply, wherein the specific magnetic body is placed in the cavity, the cavity is positioned in a magnetic field formed by the external electromagnet, the external magnetic field is used for controlling the movement of the magnetic body in the cavity, the position of the magnetic body is changed, the antenna body penetrates into the cavity from the outside, then is disconnected to form a fracture and then penetrates out of the cavity, the two electromagnets are respectively electrified, the magnetic body can move back and forth near the position of the fracture of the antenna body in the cavity, and under the control of the external magnetic field, the magnetic body in the cavity moves to the fracture of; the magnetic substance in the cavity moves away from the fracture of the antenna body, and the antenna body is disconnected, so that the characteristic that the magnetic substance can move under the regulation and control of a magnetic field is utilized, the reconstruction of the length and the shape of the antenna is conveniently and effectively realized, and the requirements of different environments and application conditions are met.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the technical solutions will be further explained with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an antenna component of a reconfigurable antenna according to an embodiment of the present invention in a state that an antenna body is connected;
fig. 2 is a schematic structural diagram of an antenna component of a reconfigurable antenna according to an embodiment of the present invention in an antenna body disconnected state;
fig. 3 is a schematic structural diagram of a reconfigurable antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second reconfigurable antenna according to an embodiment of the present invention.
In the figure: 1: an antenna assembly; 2: an antenna electric wave generator; 3: a housing; 4: connecting an external power supply; 11: an antenna body; 12: an electromagnet; 13: a chamber; 14: a magnetic body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, unless otherwise specified, "plurality", "plural groups" means two or more, and "several", "several groups" means one or more.
Example one
As shown in fig. 1, 2 and 3, the reconfigurable antenna provided by the embodiment of the invention includes a plurality of antenna assemblies 1, each antenna assembly 1 includes an antenna body 11, a reconfigurable magnet and two electromagnets 12, each reconfigurable magnet includes a cavity 13 and a magnetic body 14, the magnetic body 14 is located in the cavity 13, the antenna body 11 passes through the cavity 13 from the outside, the antenna body 11 is disconnected in the cavity 13, the two electromagnets 12 are respectively located on two sides of the cavity 13, and the arrangement direction of the electromagnets 12 is perpendicular to the arrangement direction of the antenna body 11.
The reconfigurable antenna comprises a cavity, a specific magnetic body, an external electromagnet, an antenna body, a power supply and a power supply, wherein the specific magnetic body is placed in the cavity, the cavity is positioned in a magnetic field formed by the external electromagnet, the external magnetic field is used for controlling the movement of the magnetic body in the cavity, the position of the magnetic body is changed, the antenna body penetrates into the cavity from the outside, then is disconnected to form a fracture and then penetrates out of the cavity, the two electromagnets are respectively electrified, the magnetic body can move back and forth near the position of the fracture of the antenna body in the cavity, and under the control of the external magnetic field, the magnetic body in the cavity moves to the fracture; the magnetic substance in the cavity moves away from the fracture of the antenna body, and the antenna body is disconnected, so that the characteristic that the magnetic substance can move under the regulation and control of a magnetic field is utilized, the reconstruction of the length and the shape of the antenna is conveniently and effectively realized, and the requirements of different environments and application conditions are met.
Wherein the magnetic body 14 is made of a liquid metal doped with magnetic metal particles. The liquid metal is an alloy with a low melting point, such as gallium-based alloy, indium-based alloy, bismuth-based alloy, and the like. The alloy material has good conductivity and lower melting point. The magnetic liquid metal is a material which is made by doping a magnetic material, such as iron, cobalt, nickel and other metals or alloys, into a liquid metal alloy to make the liquid metal have magnetism. The magnetic liquid metal belongs to a functional material, and the flow and position change of the liquid metal can be controlled by an external magnetic field, so that the possibility is provided for constructing a liquid electronic switch. In addition, the liquid metal itself has good electrical conductivity so that it can be used as part of an electrical circuit, and its good fluidity ensures the integrity of the electrical circuit connections. Preparing magnetic liquid metal as a magnetic body in the liquid metal by doping the magnetic material, then filling the magnetic liquid metal into a specific cavity, and under the control of an external magnetic field, enabling the magnetic liquid metal in the cavity to flow to the antenna fracture and infiltrate into the metal antenna to realize the connection of the antenna conductor; when the magnetic liquid metal flows to the other end of the cavity and is far away from the antenna fracture, the disconnection of the antenna conductor is realized, and the reconfiguration of the length and the shape of the antenna is finally realized.
Specifically, the liquid metal is a gallium-indium alloy consisting of 75.5% of gallium and 24.5% of indium, and the magnetic metal particles are iron, cobalt or nickel. The alloy melting point of the liquid metal of the present invention is 10.5 degrees, and thus remains liquid at normal temperature.
The plurality of antenna elements 1 are connected in series, and the head end and the tail end of each antenna body 11 are connected in sequence along the current flow direction. In this embodiment, the antenna assembly is in a serial connection form, and is formed by sequentially connecting the antenna bodies of the plurality of antenna assemblies end to end. The head end and tail end of the antenna body are determined according to the direction of current passing through the antenna assembly.
Further, the reconfigurable antenna also comprises an antenna electric wave generator 2, and the antenna electric wave generator 2 is connected with the tail end of the antenna body 11. The radio wave generator is connected with the tail end of the antenna body and can generate radio signals.
Wherein, the housing 3 is arranged outside the antenna body 11 and outside the cavity 13. The shell body is used for integrally connecting, reinforcing and protecting the antenna body and the cavity. The sealing performance and firmness of the joint of the two are ensured.
Wherein, the electromagnet 12 is connected with the external power supply 4. The external power supply is electrified by the electromagnet, so that the magnet forms a magnetic field of a country sound to control the movement of the magnetic body.
When the antenna is used, the antenna body can be made of traditional rigid metal materials, such as copper, aluminum and the like, and can also be made of low-melting-point metals or alloys such as liquid metals and the like. The electromagnet can be independently arranged on the outer side of the chamber, and can also be arranged on the outer wall of the chamber to form a whole with the chamber. In addition, a permanent magnet may be used instead of the electromagnet.
Example two
As shown in fig. 4, the reconfigurable antenna provided by the second embodiment of the present invention is substantially the same as the reconfigurable antenna provided by the first embodiment, except that in this embodiment, a plurality of antenna elements 1 are connected in parallel, and the head end and the tail end of each antenna body 11 are connected respectively. The antenna components are arranged at equal intervals, the head ends of the antenna bodies are connected with the main line, and the tail ends of the antenna bodies are connected with the radio wave generator. Under the control of an external magnetic field generated by electrifying the electromagnet, the magnetic body in the cavity is communicated with the antenna body and the radio wave generator, so that the lower section of the antenna is short-circuited, and the length of the antenna is changed.
In summary, in the reconfigurable antenna of the invention, a specific magnetic ball is placed in a cavity, the cavity is located in a magnetic field formed by an external electromagnet, the external magnetic field is used to control the movement of the magnetic ball in the cavity, the position of the magnetic ball is changed, the antenna body penetrates into the cavity from the outside, then is disconnected to form a fracture and then penetrates out of the cavity, the two electromagnets are respectively electrified, so that a magnetic body can move back and forth near the position of the fracture of the antenna body in the cavity, the magnetic ball in the cavity moves to the fracture of the antenna body under the control of the external magnetic field, and the disconnected antenna body is communicated, thereby realizing the connection of the antenna body; the magnetic ball in the cavity moves away from the fracture of the antenna body, and the antenna body is disconnected, so that the antenna length and shape can be conveniently and effectively reconstructed by utilizing the characteristic that the magnetic ball can move under the regulation and control of a magnetic field, and the requirements of different environments and application conditions are met.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A reconfigurable antenna, characterized by: the antenna comprises a plurality of antenna assemblies, each antenna assembly comprises an antenna body, a reconstruction magnet and two electromagnets, each reconstruction magnet comprises a cavity and a magnetic body, the magnetic bodies are located in the cavities, the antenna bodies penetrate through the cavities from the outside, the antenna bodies are disconnected in the cavities, the two electromagnets are respectively located on two sides of each cavity, and the arrangement direction of the electromagnets is perpendicular to the arrangement direction of the antenna bodies; the antenna body penetrates into the cavity from the outside, then is disconnected to form a fracture, and then penetrates out of the cavity, the two electromagnets are respectively electrified to enable the magnetic body to move back and forth near the position of the fracture of the antenna body in the cavity, the magnetic body in the cavity moves to the fracture of the antenna body to connect the disconnected antenna, and the connection of the antenna body is realized; the magnetic body in the cavity moves away from the fracture of the antenna body, and the antenna body is disconnected.
2. The reconfigurable antenna of claim 1, wherein: the magnetic body is made of liquid metal doped with magnetic metal particles.
3. The reconfigurable antenna of claim 2, wherein: the liquid metal is gallium-indium alloy consisting of 75.5% of gallium and 24.5% of indium, and the magnetic metal particles are iron, cobalt or nickel.
4. The reconfigurable antenna of claim 1, wherein: the antenna assemblies are connected in series, and the head end and the tail end of each antenna body are sequentially connected along the current flow direction.
5. The reconfigurable antenna of claim 1, wherein: the antenna assemblies are connected in parallel, and the head end and the tail end of each antenna body are connected respectively.
6. The reconfigurable antenna of claim 4 or 5, wherein: the antenna comprises an antenna body and is characterized by further comprising an antenna electric generator, wherein the antenna electric generator is connected with the tail end of the antenna body.
7. The reconfigurable antenna of claim 1, wherein: and the outer part of the antenna body and the outer part of the cavity are both provided with a shell.
8. The reconfigurable antenna of claim 1, wherein: the electromagnet is connected with an external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800518.7A CN107706525B (en) | 2017-09-07 | 2017-09-07 | Reconfigurable antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800518.7A CN107706525B (en) | 2017-09-07 | 2017-09-07 | Reconfigurable antenna |
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| CN107706525A CN107706525A (en) | 2018-02-16 |
| CN107706525B true CN107706525B (en) | 2021-01-01 |
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| CN201710800518.7A Active CN107706525B (en) | 2017-09-07 | 2017-09-07 | Reconfigurable antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950686B (en) * | 2019-03-11 | 2020-07-14 | 南京理工大学 | Electric control structure for reconstructing liquid metal and reconstruction method thereof |
| CN109978125B (en) * | 2019-03-29 | 2022-04-05 | 上海宜链物联网有限公司 | RFID antenna capable of improving multi-tag reading capability, reader-writer and method |
| CN110247165B (en) * | 2019-05-20 | 2024-05-03 | 珠海格力电器股份有限公司 | Antenna structure and mobile terminal with same |
| KR20210017178A (en) * | 2019-08-07 | 2021-02-17 | 주식회사 엘지화학 | Electrochemical Device for Short Circuit Induction and Method of Evaluation for Safety Using Thereof |
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| CN102948009A (en) * | 2010-06-22 | 2013-02-27 | 哈里公司 | Continuous dipole antenna |
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| US8587493B2 (en) * | 2010-09-23 | 2013-11-19 | North Carolina State University | Reversibly deformable and mechanically tunable fluidic antennas |
| CN201868836U (en) * | 2010-10-19 | 2011-06-15 | 东北大学 | Dual-fluid self-restoration circuit breaking device using combined magnet |
| CN202120847U (en) * | 2011-05-12 | 2012-01-18 | 东北大学 | Remotely controlled double-fluid circuit breaker with permanent magnet utilized |
| CN202121067U (en) * | 2011-06-29 | 2012-01-18 | 电子科技大学 | Ultra-wideband antenna with reconfigurable frequency |
| US9113559B2 (en) * | 2012-08-21 | 2015-08-18 | University Of Cincinnati | Pressure reconfigured electromagnetic devices |
| KR101958864B1 (en) * | 2012-09-17 | 2019-03-15 | 삼성전자 주식회사 | Antenna apparatus using liquid metal and portable terminal using the same |
| CN106158223A (en) * | 2016-07-21 | 2016-11-23 | 成都博盈复希科技有限公司 | A kind of magnetic liquid metal and preparation method thereof |
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| CN102948009A (en) * | 2010-06-22 | 2013-02-27 | 哈里公司 | Continuous dipole antenna |
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| A Liquid-Metal Monopole Array With Tunable Frequency, Gain, and Beam Steering;Andy M. Morishita;《 IEEE Antennas and Wireless Propagation Letters 》;20131023;全文 * |
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