CN110828981A - Liquid metal reconfigurable antenna and antenna array - Google Patents
Liquid metal reconfigurable antenna and antenna array Download PDFInfo
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- CN110828981A CN110828981A CN201810905034.3A CN201810905034A CN110828981A CN 110828981 A CN110828981 A CN 110828981A CN 201810905034 A CN201810905034 A CN 201810905034A CN 110828981 A CN110828981 A CN 110828981A
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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
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
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Abstract
The invention relates to the technical field of antennas, and discloses a liquid metal reconfigurable antenna and an antenna array. The liquid metal reconfigurable antenna comprises a first antenna tube and a second antenna tube which are communicated with each other, a piston and a piston rod are arranged in each antenna tube, the piston rods can drive the pistons to move along the axial direction of the antenna tubes, and the first antenna tube and the second antenna tube are filled with liquid metal. According to the reconfigurable antenna, the piston rod is moved to drive the piston to move along the axial direction of the antenna tube, so that the liquid level height of liquid metal in the first antenna tube and the liquid level height of liquid metal in the second antenna tube are changed, and the continuous reconfiguration of the reconfigurable antenna state is realized. Meanwhile, the cross sectional area of the second antenna tube is larger than that of the first antenna tube, so that the liquid level change of the first antenna tube is more obvious, the precise regulation and control of the antenna state can be realized, and the working frequency band of the antenna is greatly widened. The reconfigurable antenna has the advantages that two ends are sealed, leakage of liquid metal during tilting is avoided, and environmental adaptability is improved.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a liquid metal reconfigurable antenna and an antenna array.
Background
In the field of wireless communication, an antenna, as a component for transmitting or receiving electromagnetic waves, is widely used in engineering systems such as radio communication, broadcasting, television, navigation, radar, measurement and control, and the like. With the technological progress and the improvement of the living standard of people, the users and the demands of the communication system are increased rapidly, so that the wireless communication system develops towards the direction of high capacity, multiple functions and ultra wide band. This causes the number of antennas on the same platform to increase continuously, which results in larger size and heavier quality of the whole communication system, and the increase of the antenna density also results in serious electromagnetic interference between the antennas, and the overall performance of the communication system is reduced. On one hand, the antenna needs to work in a plurality of frequency bands, and signal transmission in a multifunctional and multi-working mode is realized; on the other hand, the antenna must also be considered for miniaturization, light weight, low cost, and good electromagnetic compatibility. The above mentioned contradiction occurs as a bottleneck restricting the development of the wireless communication system. The problem is well solved by the proposal of the reconfigurable antenna concept. The reconfigurable antenna aims to realize the functions of a plurality of antennas by adopting one antenna so as to meet various system requirements and adapt to complex and changeable application environments.
At present, a reconfigurable antenna generally adopts a micro-electromechanical control system or a switch element such as a PIN diode to switch and select different working structures of the antenna, so as to realize selection of multiple working modes of the antenna. However, the control states of these control elements are simple, and the reconstruction of the antenna aperture can be performed only in a local area, and the reconstruction capability is limited. In addition, the control elements can introduce strong nonlinear effect, and the antenna receiving and transmitting sensitivity is influenced.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a liquid metal reconfigurable antenna which is simple in structure and convenient to adjust, and solves the problems that the existing reconfigurable antenna is limited in reconfiguration capability and low in transceiving sensitivity.
Another object of the present invention is to provide an antenna array using the above liquid metal reconfigurable antenna, so as to meet the requirement of individually reconfiguring a plurality of antennas.
(II) technical scheme
In order to solve the technical problem, the invention provides a liquid metal reconfigurable antenna, which comprises a first antenna tube and a second antenna tube which are communicated with each other, wherein the cross-sectional area of the second antenna tube is larger than that of the first antenna tube; a first piston in sealing sliding fit with the inner surface of the first antenna tube is arranged in the first antenna tube, the first piston is connected to a first piston rod, and the first piston rod can drive the first piston to move along the axial direction of the first antenna tube; a second piston in sealing sliding fit with the inner surface of the second antenna tube is arranged in the second antenna tube, the second piston is connected with a second piston rod, and the second piston rod can drive the second piston to move along the axial direction of the second antenna tube; a closed cavity formed among the first antenna tube, the first piston, the second antenna tube and the second piston is filled with liquid metal; and a feeder joint for connecting the liquid metal and the feeder is arranged on the second piston.
The first piston rod and the second piston rod are both connected with a driving mechanism, and the driving mechanism is used for driving the first piston rod and the second piston rod to move simultaneously.
The driving mechanism comprises a first driving mechanism and a second driving mechanism, the first piston rod is connected with the first driving mechanism, and the second piston rod is connected with the second driving mechanism.
Wherein the driving mechanism is fixed to the first antenna tube or the second antenna tube.
The driving mechanism is connected with a controller, and the controller is used for controlling the driving mechanism so that the driving mechanism drives the first piston rod and the second piston rod to move according to a preset program.
The first antenna tube is provided with a first limiting block, so that the first piston rod moves along the axial direction of the first antenna tube; and a second limiting block is arranged on the second antenna tube, so that the second piston rod moves along the axial direction of the second antenna tube.
Wherein a ratio of the cross-sectional area of the first antenna tube to the cross-sectional area of the second antenna tube ranges from 1:2 to 1: 100.
Wherein, the first piston rod is marked with scales, and/or the second piston rod is marked with scales.
Wherein the melting point range of the liquid metal is-45 ℃ to 50 ℃.
The invention also provides an antenna array using the liquid metal reconfigurable antenna, which comprises a plurality of liquid metal reconfigurable antennas and a master controller, wherein the master controller is used for controlling the first piston rod and the second piston rod of any liquid metal reconfigurable antenna to move according to a preset program.
(III) advantageous effects
Compared with the prior art, the invention has the following advantages:
according to the liquid metal reconfigurable antenna and the antenna array, the piston is driven by the liquid metal reconfigurable antenna to move along the axial direction of the antenna tube through the moving piston rod, the liquid level height of liquid metal in the first antenna tube and the second antenna tube is changed, continuous reconfiguration of the reconfigurable antenna state is achieved, and the defect that the reconfigurable form of the existing antenna is few is overcome. Meanwhile, the cross sectional area of the second antenna tube is larger than that of the first antenna tube, so that the liquid level change of the first antenna tube is more obvious, the precise regulation and control of the antenna state can be realized, and the working frequency band of the antenna is greatly widened. The reconfigurable antenna has the advantages that two ends are sealed, leakage of liquid metal during inclination is avoided, the installation angle and position of the antenna are not limited, and the environmental adaptability is improved. In addition, because no switch control element is introduced, the nonlinear effect of the antenna is reduced, and the sensitivity is improved.
The antenna array utilizing the liquid metal reconfigurable antenna can meet the requirement of respectively reconfiguring a plurality of antennas, and is suitable for places such as airplanes or ships and the like with limited installation space and severe use environments.
Drawings
Fig. 1 is a schematic structural diagram of a liquid metal reconfigurable antenna in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a drive mechanism in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another liquid metal reconfigurable antenna in an embodiment of the invention;
fig. 4 is a schematic structural diagram of a liquid metal reconfigurable antenna array in an embodiment of the present invention;
description of reference numerals:
1: a first antenna tube; 2: a second antenna tube; 31: a first stopper;
32: a second limiting block; 33: a drive mechanism fixing block; 4: a liquid metal;
5: a first piston rod; 6: a second piston rod; 7: a drive mechanism;
71: a first drive mechanism; 711: a first drive wheel; 712: a second drive wheel;
72: a second drive mechanism; 81: a first piston; 82: a second piston;
9: a controller; 10: a power source; 11: an antenna row;
12: a master controller; 13: the total power supply.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "first", "second", and the like are used for the sake of clarity in describing the numbering of the product parts and do not represent any substantial difference. The directions of the upper part, the lower part, the left part and the right part are all based on the directions shown in the attached drawings. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that, unless otherwise expressly stated or limited, the term "coupled" is used in a generic sense as defined herein, e.g., fixedly attached or removably attached or integrally attached; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a liquid metal reconfigurable antenna according to an embodiment of the present invention, and as shown in fig. 1, the embodiment provides a liquid metal reconfigurable antenna including a first antenna tube 1 and a second antenna tube 2 that are communicated with each other. Wherein, the upper end of the first antenna tube 1 is open and communicated with the atmosphere, and the lower end of the first antenna tube 1 is connected with the second antenna tube 2; the upper end of the second antenna tube 2 is connected with the lower end of the first antenna tube 1, and the lower end of the second antenna tube 2 is open and communicated with the atmosphere. The connection between the first antenna tube 1 and the second antenna tube 2 may be welded or screwed, and is preferably integrally formed.
The first antenna tube 1 and the second antenna tube 2 are hollow tubes with equal sections, and the cross sections of the first antenna tube 1 and the second antenna tube 2 can be triangular or quadrangular. Preferably, the first antenna tube 1 and the second antenna tube 2 are both circular tubes. The cross-sectional area of the second antenna tube 2 is larger than the cross-sectional area of the first antenna tube 1. Further, the ratio of the cross-sectional area of the first antenna tube 1 to the cross-sectional area of the second antenna tube 2 ranges from 1:2 to 1: 100. Taking the ratio of the cross sectional area of the first antenna tube 1 to the cross sectional area of the second antenna tube 2 as 1:80 as an example, when the liquid level of the liquid metal 4 in the second antenna tube 2 moves up by 1cm, the liquid level of the liquid metal 4 in the first antenna tube 1 moves up by 80cm, which is equivalent to amplifying the liquid level signal in the second antenna tube 2 by eighty times, and the reconstruction of the antenna state can be realized more quickly and more timely by adjusting the liquid level of the liquid metal 4 in the second antenna tube 2. Meanwhile, when the liquid level of the liquid metal 4 in the first antenna tube 1 needs to move up 1cm, the liquid level in the second antenna tube 2 needs to move up only 0.0125cm, whereas 0.0125cm is a very small displacement value, and if the liquid level in the second antenna tube 2 is adjusted by conventional mechanical means, it is difficult to achieve such precise adjustment. However, the liquid level in the first antenna tube 1 can be directly adjusted, and the liquid level can be accurately adjusted and controlled simply. Therefore, the liquid levels in the first antenna tube 1 and the second antenna tube 2 are adjusted simultaneously, so that the continuous and quick reconstruction of the antenna state can be realized, and the accurate regulation and control can be realized.
The first piston 81 is arranged in the first antenna tube 1 and is in sealing sliding fit with the inner surface of the first antenna tube, and here, the sealing sliding fit means that the first piston 81 is tightly attached to the inner wall surface of the first antenna tube 1, and can also slide relatively, that is, the first piston 81 can overcome the friction force between the first piston and the inner wall surface of the first antenna tube 1 to slide up and down. The first piston 81 prevents the liquid metal 4 in the first antenna tube 1 from leaking and prevents foreign substances, such as dust and water, from contaminating the liquid metal in the first antenna tube 1, while the sliding of the first piston 81 changes the level of the liquid metal 4 in the first antenna tube 1. The first piston 81 is connected to the first piston rod 5, and the first piston rod 5 can drive the first piston 81 to move along the axial direction of the first antenna tube 1. Specifically, the axis of the first piston rod 5 is parallel to the axis of the first antenna tube 1, and the first piston rod 5 is fixedly connected to the first piston 81. Preferably, the first piston 81 is made of an elastic material, such as rubber or silicone. Further, lubricating oil may be used between the first piston 81 and the inner wall surface of the first antenna tube 1 to reduce the movement resistance of the first antenna tube 1 and enhance the sealing effect against the liquid metal in the first antenna tube 1.
Similarly, the second piston 82 is disposed in the second antenna tube 2 and is in sealing sliding fit with the inner surface thereof, where sealing sliding fit means that the second piston 82 is in close contact with the inner wall surface of the second antenna tube 2, and can also slide relatively, that is, the second piston 82 can slide up and down against the friction force between the second piston and the inner wall surface of the second antenna tube 2. The second piston 82 prevents the liquid metal 4 in the second antenna pipe 2 from leaking and prevents foreign substances, such as dust and water, from contaminating the liquid metal in the second antenna pipe 2, and the sliding of the second piston 82 changes the liquid level of the liquid metal 4 in the second antenna pipe 2. The second piston 82 is connected to the second piston rod 6, and the second piston rod 6 can drive the second piston 82 to move along the axial direction of the second antenna tube 2. Specifically, the axis of the second piston rod 6 is parallel to the axis of the second antenna tube 2, and the second piston rod 6 is fixedly connected to the second piston 82. Preferably, the second piston 82 is made of an elastic material, such as rubber or silicone. Further, lubricating oil may be used between the second piston 82 and the inner wall surface of the second antenna tube 2 to reduce the movement resistance of the second antenna tube 2 and enhance the sealing effect on the liquid metal in the second antenna tube 2
The enclosed cavity formed between the first antenna tube 1, the first piston 81, the second antenna tube 2 and the second piston 82 is filled with liquid metal 4. The closed cavity formed between the two cavities is filled with liquid metal; the first antenna tube 1 mainly plays a role of storing liquid metal, and when the liquid metal 4 needs to be injected, the first piston 81 can be firstly placed in the first antenna tube 1; then the opening of the second antenna tube 2 is upward, and liquid metal 4 is injected into the second antenna tube 2; then the second piston 82 is placed in the second antenna tube 2, so that the two ends of the liquid metal are sealed; finally the first antenna tube 1 is placed face up. In addition to the above manner, the second piston 82 may be placed into the second antenna tube 2, then the opening of the first antenna tube 1 is upward, the liquid metal 4 is directly injected from the opening of the first antenna tube 1, and the first piston 81 is placed into the first antenna tube 1 after the liquid metal is filled.
The second piston 82 is also provided with a feeder connector (not shown) for connecting the liquid metal 4 to a feeder (not shown). The feeder connector on the second piston 82 is a female connector and the conductive elements in the connector are always in contact with the liquid metal 4. The connector on the external feeder adopts a male connector matched with the connector, and the male connector and the female connector are matched with each other to realize signal transmission. The feeder connector on the second piston 82 may be an SMA type connector, a TNC type connector, an N type connector, or a DIN type connector, etc., or may be a universal connector type defined in other national standards.
According to the reconfigurable antenna of the liquid metal, the first piston rod is moved to drive the first piston to move axially along the first antenna tube, the second piston rod is moved to drive the second piston to move axially along the second antenna tube, so that the liquid level height of the liquid metal in the first antenna tube and the liquid level height of the liquid metal in the second antenna tube are changed, the reconfigurable antenna is continuously reconfigured, and the defect that the reconfigurable form of the existing antenna is few is overcome. Meanwhile, the cross sectional area of the second antenna tube is larger than that of the first antenna tube, so that the liquid level change of the first antenna tube is more obvious, the precise regulation and control of the antenna state can be realized, and the working frequency band of the antenna is greatly widened. The reconfigurable antenna has the advantages that two ends are sealed, leakage of liquid metal during inclination is avoided, the installation angle and position of the antenna are not limited, and the environmental adaptability is improved.
Further, as shown in fig. 1, the first piston rod 5 and the second piston rod 6 are both connected to a driving mechanism 7, and the driving mechanism 7 is used for driving the first piston rod 5 and the second piston rod 6 to move simultaneously. The number of drive mechanisms 7 may be one, a single drive mechanism 7 comprising two drive units, each drive unit controlling a respective piston rod. The driving mechanism can adopt an electric screw rod and can also adopt a gear and rack transmission mode. Preferably, the driving wheel clamping propulsion mode is adopted, as shown in fig. 2, the first driving mechanism 71 includes a first driving wheel 711, a second driving wheel 712 and a motor (not shown in the figure), the first driving wheel 711 and the second driving wheel 712 clamp the first piston rod 5 therebetween, the motor drives the first driving wheel 711 to rotate counterclockwise and simultaneously drives the second driving wheel 712 to rotate clockwise, and the first piston rod 5 moves upward under the friction force of the two driving wheels. Specifically, first drive wheel 711 and second drive wheel 712 are U type pulley, and first piston rod 5 card is put in the U type groove of two left and right U type pulleys, and first drive wheel 711 and second drive wheel 712 exert pressure to first piston rod 5 simultaneously and grasp first piston rod 5, and U type inslot wall sets up the line, increases the roughness of wall, increases the frictional force between drive wheel and the piston rod, orders about first piston rod 5 motion.
Furthermore, the two driving units included in the driving mechanism 7 can be respectively controlled by using independent motors, so that the flexibility of controlling the two piston rods can be improved. In addition, the two driving units can be controlled by the same motor, and in this case, a transmission ratio can be changed between the two driving wheels by using a speed change gear, a chain transmission or a belt transmission, and the transmission ratio can be selected according to the ratio of the cross-sectional area of the first antenna tube 1 to the cross-sectional area of the second antenna tube 2 and the clamping propulsion efficiency of the two driving wheels. The cost can be saved and the control flow can be simplified by adopting one motor for control.
Further, the number of the driving mechanisms 7 may also be two, as shown in fig. 3, the driving mechanism 7 includes a first driving mechanism 71 and a second driving mechanism 72, the first piston rod 5 is connected to the first driving mechanism 71, and the second piston rod 6 is connected to the second driving mechanism 72. When the shape of the first antenna tube is a zigzag shape, an included angle is formed between the first piston rod 5 and the second piston rod 6, the first piston rod 5 is controlled independently by the first driving mechanism 71, and the second piston rod 6 is controlled independently by the second driving mechanism 72, so that the control accuracy is improved.
Further, the driving mechanism 7 is fixed to the first antenna tube 1 or the second antenna tube 2. Specifically, as shown in fig. 1, the driving mechanism 7 is fixed to the first antenna tube 1 by a driving mechanism fixing block 33, and may be fixed in a clip form. The driving mechanism 7 may also be fixed to the second antenna tube 2. In addition, as shown in fig. 3, when the first antenna tube 1 is in a two-section broken line form, there are two corresponding driving mechanism fixing blocks, the first driving mechanism 71 is fixed at the upper broken line section of the first antenna tube 1 by one of the driving mechanism fixing blocks 33, and the second driving mechanism 72 is fixed at the lower broken line section of the first antenna tube 1 by the other driving mechanism fixing block 33, which can be fixed in a clamping manner. The actual fixed position of the drive mechanism may be determined based on the shape of the antenna tube and the adjustable length of the piston rod.
Further, the driving mechanism 7 is connected to a controller 9, and the controller 9 is configured to control the driving mechanism 7 such that the driving mechanism 7 drives the first piston rod 5 and the second piston rod 6 to move according to a preset program. Before reconstructing the antenna, the antenna parameters in various states may be measured by a network analyzer, the state parameters of the driving mechanism at this time are recorded, the state parameters of the driving mechanism and the antenna parameters are subjected to correlation calculation, and the calculation results are recorded in the controller 9. When a reconfigurable antenna with specified parameters needs to be obtained, the controller 9 automatically analyzes the parameter requirements and outputs a preset program to control the state parameters of the driving mechanism 7, so as to realize the accurate reconfiguration of the antenna. Further, a power supply 10 is included for supplying power to the controller 9.
Further, the first antenna tube 1 is provided with a first stopper 31, so that the first piston rod 5 moves along the axial direction of the first antenna tube 1. Specifically, mounting holes are formed in the tube walls of two opposite sides of the first antenna tube 1, and the first limiting block 31 can penetrate through the two mounting holes and be fixed to the corresponding position of the first antenna tube 1. Meanwhile, a through hole is further formed in the first limiting block 31 along the axial direction of the first antenna tube 1, one end of the first piston rod 5 penetrates through the through hole to be connected with the first piston 81, and the diameter of the through hole is larger than the outer diameter of the first piston rod 5, so that the first piston rod 5 can freely move in the through hole. By arranging the first stopper 31, the first piston rod 5 can move along the axial direction of the first antenna tube 1 without being skewed, and at this time, the transmission efficiency of the tensile force or the pushing force of the first piston rod 5 to the first piston 81 is the greatest. Meanwhile, the position of the first limiting block 31 can be selected according to the maximum liquid level which can be reached by the liquid metal 4 in the first antenna tube 1, the maximum stroke boundary of the first piston 81 is limited by the first limiting block 31, and the liquid level of the liquid metal is prevented from being adjusted beyond the range. Similarly, a second stopper 32 is disposed on the second antenna tube 2, so that the second piston rod 6 moves along the axial direction of the second antenna tube 2.
Further, the first piston rod 5 is marked with a scale and/or the second piston rod 6 is marked with a scale. The position of the first piston 81 in the first antenna tube 1 and the position of the second piston 82 in the second antenna tube 2, and thus the position of the liquid level of the liquid metal 4, can be known by calibration. The liquid level of the liquid metal in the antenna tube is obtained by observing the scales on the piston rod, the material of the antenna tube is not limited, the antenna tube can be made of transparent materials and non-transparent materials, and the liquid level representation of the liquid metal is not affected.
Further, the melting point of the liquid metal ranges from-45 ℃ to 50 ℃. The liquid metal may be a gallium indium alloy with a melting point of 15.6 ℃ or a gallium indium tin alloy with a melting point of 11 ℃. Other liquid metals having melting points within the above temperature range are possible. Liquid metals are low melting point metals having a melting point below 300 ℃, and metals that are liquid at room temperature are also referred to as room temperature liquid metals. The liquid metal has better rheological property, conductivity and self-repairing property, and is easy to realize the regulation and control of the form, thereby having remarkable reconfigurable advantage.
Furthermore, the first antenna tube 1, the second antenna tube 2, the first limiting block 31, the second limiting block 32, the driving mechanism fixing block 33, the first piston rod 5 and the second piston rod 6 are all made of non-metal insulating materials, such as organic glass or polytetrafluoroethylene.
As shown in fig. 4, the present invention further provides an antenna array using the liquid metal reconfigurable antenna, including a plurality of liquid metal reconfigurable antennas and a master controller 12, where the master controller 12 is configured to control the first piston rod 5 and the second piston rod 6 of any liquid metal reconfigurable antenna to move according to a preset program. The antenna array also includes a mains power supply 13 for powering a mains controller 12. The plurality of liquid metal reconfigurable antennas can be formed into a crisscross array form, and the array form comprises m antenna rows 11, and each antenna row 11 comprises n reconfigurable antennas. Wherein the value range of m is 1-20, and the value range of n is 1-20. Specifically, the driving mechanism 7 of each reconfigurable antenna may be directly connected to the overall controller 12, and then the overall controller 12 directly sends a control signal to each driving mechanism 7. It is also possible that the driving mechanisms 7 in each antenna bank 11 are connected in series, and then each antenna bank 11 outputs a signal line to be connected to the overall controller 12. Besides the above manner, each reconfigurable antenna can be provided with an independent controller 9, then each controller 9 is connected with the master controller 12 in a wired or wireless communication manner, and when the number of antennas in the antenna array is large, the independent controllers 9 can share the calculation pressure of the master controller 12, so that the adjustment speed of the whole array is improved.
According to the embodiment, the liquid metal reconfigurable antenna comprises the first antenna tube and the second antenna tube which are different in cross sectional area, the first piston rod is moved to drive the first piston to move along the axial direction of the first antenna tube, and the second piston rod is moved to drive the second piston to move along the axial direction of the second antenna tube, so that the liquid level height of liquid metal in the first antenna tube and the liquid metal in the second antenna tube are changed, the continuous reconfiguration of the liquid metal reconfigurable antenna state is realized, and the defect that the reconfigurable state of the existing antenna is few is overcome. Meanwhile, the cross sectional area of the second antenna tube is larger than that of the first antenna tube, so that the liquid level change of the first antenna tube is more obvious, the precise regulation and control of the antenna state can be realized, and the working frequency band of the antenna is greatly widened. The two ends of the reconfigurable antenna made of the liquid metal are sealed, leakage of the liquid metal during inclination is avoided, the installation angle and position of the antenna are not limited, and the environmental adaptability is improved. In addition, because no switch control element is introduced, the nonlinear effect of the antenna is reduced, and the sensitivity is improved.
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 (10)
1. The reconfigurable antenna is characterized by comprising a first antenna tube and a second antenna tube which are communicated with each other, wherein the cross-sectional area of the second antenna tube is larger than that of the first antenna tube; a first piston in sealing sliding fit with the inner surface of the first antenna tube is arranged in the first antenna tube, the first piston is connected with a first piston rod, and the first piston rod can drive the first piston to move along the axial direction of the first antenna tube; a second piston in sealing sliding fit with the inner surface of the second antenna tube is arranged in the second antenna tube, the second piston is connected with a second piston rod, and the second piston rod can drive the second piston to move along the axial direction of the second antenna tube; a closed cavity formed among the first antenna tube, the first piston, the second antenna tube and the second piston is filled with liquid metal; and a feeder joint for connecting the liquid metal and the feeder is arranged on the second piston.
2. The liquid metal reconfigurable antenna of claim 1, wherein the first piston rod and the second piston rod are both connected to a drive mechanism for driving the first piston rod and the second piston rod to move simultaneously.
3. The liquid metal reconfigurable antenna of claim 2, wherein the drive mechanism comprises a first drive mechanism and a second drive mechanism, the first piston rod is connected with the first drive mechanism, and the second piston rod is connected with the second drive mechanism.
4. A liquid metal reconfigurable antenna according to claim 2, wherein the drive mechanism is secured to the first antenna tube or the second antenna tube.
5. The liquid metal reconfigurable antenna of claim 2, wherein the driving mechanism is connected to a controller, and the controller is configured to control the driving mechanism such that the driving mechanism drives the first piston rod and the second piston rod to move according to a preset program.
6. The liquid metal reconfigurable antenna of claim 1, wherein a first stop block is disposed on the first antenna tube to enable the first piston rod to move in an axial direction of the first antenna tube; and a second limiting block is arranged on the second antenna tube, so that the second piston rod moves along the axial direction of the second antenna tube.
7. The liquid metal reconfigurable antenna of claim 1, wherein a ratio of a cross-sectional area of the first antenna tube to a cross-sectional area of the second antenna tube ranges from 1:2 to 1: 100.
8. The liquid metal reconfigurable antenna of claim 1, wherein the first piston rod is marked with a scale and/or the second piston rod is marked with a scale.
9. The liquid metal reconfigurable antenna of claim 1, wherein the melting point of the liquid metal ranges from-45 ℃ to 50 ℃.
10. An antenna array using a liquid metal reconfigurable antenna according to any one of claims 1 to 9, comprising a plurality of the liquid metal reconfigurable antennas and a master controller, wherein the master controller is configured to control the first piston rod and the second piston rod of any of the liquid metal reconfigurable antennas to move according to a preset program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905034.3A CN110828981A (en) | 2018-08-09 | 2018-08-09 | Liquid metal reconfigurable antenna and antenna array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905034.3A CN110828981A (en) | 2018-08-09 | 2018-08-09 | Liquid metal reconfigurable antenna and antenna array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928471A (en) * | 2021-01-21 | 2021-06-08 | 维沃移动通信有限公司 | Electronic device and antenna switching method |
| CN114597637A (en) * | 2022-03-08 | 2022-06-07 | 中国科学院理化技术研究所 | Reconfigurable antenna |
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2018
- 2018-08-09 CN CN201810905034.3A patent/CN110828981A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928471A (en) * | 2021-01-21 | 2021-06-08 | 维沃移动通信有限公司 | Electronic device and antenna switching method |
| CN112928471B (en) * | 2021-01-21 | 2024-02-27 | 维沃移动通信有限公司 | Electronic equipment and antenna switching method |
| CN114597637A (en) * | 2022-03-08 | 2022-06-07 | 中国科学院理化技术研究所 | Reconfigurable antenna |
| CN114597637B (en) * | 2022-03-08 | 2023-12-19 | 中国科学院理化技术研究所 | reconfigurable antenna |
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