Multi-point driving piezoelectric wideband antenna

Abstract

The application discloses a kind of multi-point drive piezoelectric pole wideband antenna, comprising: positive electrode metal copper line bridge, negative electrode metal copper line bridge, two Archimedes spiral piezoelectric ceramic lines, lithium cobaltate coating, silver chloride coating, rare earth giant magnetostrictive material Terfenol-D film, silicon dielectric substrate, multiple pairs of electric connection points similar to a pair of electric connection points.Two Archimedes spiral piezoelectric ceramic lines are respectively coated with lithium cobaltate coating and silver chloride coating, and placed on the silicon dielectric substrate.The present application forms a vortex current by regulating electric connection points, realizes extremely wideband circular polarization and vortex antenna switching, and has high sensitivity and stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ultra-wideband electromagnetic wave transceiving and antenna, and particularly relates to a multi-point driving piezoelectric ultra-wideband antenna. BACKGROUND

[0002] With the rapid development of wireless communication technology, the demand for wideband, circularly polarized and vortex antennas is increasing to meet the demand for wide coverage frequency and high communication capacity. Many frequency bands in modern communication have been used, and spectrum resources are increasingly scarce. And now the communication technology is developing towards millimeter wave and very low frequency band, and the coverage frequency of electromagnetic wave is becoming wider and wider, so it is very important to perceive the spectrum in the ultra-wide frequency band range for the antenna. At the same time, circularly polarized antennas are often used in remote sensing, satellite communication and military and civilian mobile communication fields due to their unique polarization characteristics. Circular polarization can effectively reduce signal interference caused by multipath propagation, improve the reliability and anti-noise ability of the system, and the multi-layer antenna structure can further improve the bandwidth and gain performance of the antenna, making it more flexible and diverse in various application scenarios.

[0003] In recent years, orbital angular momentum (OAM) has attracted widespread attention due to its unique electromagnetic properties in improving communication capacity. Vortex electromagnetic waves carry orbital angular momentum, thus embodying a new degree of freedom in addition to the traditional degrees of freedom of intensity, phase, frequency and polarization. In theory, there are infinitely many orthogonal modes that do not interfere with each other at any frequency, so it has important application potential in radar imaging, wireless communication and other fields.

[0004] In addition, compared with the design of traditional complex feed network, the multi-point driven electro-polarized antenna often has a relatively simple and efficient design structure, and changing the number of electrical connection points of the electrode and the antenna system can change the polarization direction of the electromagnetic wave, so such an antenna can control the antenna working state in a relatively flexible way, and then radiate electromagnetic waves of different frequency bands and polarization modes. Therefore, the defects of the prior art mainly lie in the difficulty of frequency controllability of the antenna, and the difficulty of simultaneously realizing wideband frequency regulation and polarization regulation. Although circularly polarized antennas and vortex antennas have potential in improving system performance and spectrum efficiency, they cannot meet the design of polarization regulation and vortex antenna conversion in actual design, and the structure of the antenna needs to be changed to realize the design of polarization and vortex antenna, so there are still problems such as complex antenna design in practical application. In order to simplify the structure design of the antenna and simultaneously realize polarization regulation, vortex regulation and ultra-wideband coverage regulation, in order to adapt to more extensive frequency band and polarization mode requirements, there is an urgent need for a solution to the problems existing in the prior art. SUMMARY

[0005] To solve the above technical problems, the application provides a multi-point driving piezoelectric electrode wideband antenna, which can not only meet the demand of covering wideband electromagnetic waves, but also radiate vortex or circularly polarized electromagnetic waves, and can simplify the antenna design, improve the communication system capacity and resist multipath and environmental interference, so as to solve the problems of the prior art.

[0006] To achieve the above object, the application provides a multi-point driving piezoelectric electrode wideband antenna, which comprises the following steps:

[0007] Two metal copper wire bridges and two spiral piezoelectric ceramic wires;

[0008] The two metal copper wire bridges comprise a positive electrode metal copper wire bridge and a negative electrode metal copper wire bridge;

[0009] The two spiral piezoelectric ceramic wires comprise a first spiral piezoelectric ceramic wire coated with a lithium cobaltate coating and a second spiral piezoelectric ceramic wire coated with a silver chloride coating;

[0010] The shapes of the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are concentric spiral circular rings, the shapes of the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are the same, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are arranged in a double-layer spiral structure and vertically correspond to each other;

[0011] The outer surfaces of the lithium cobaltate coating and the silver chloride coating are plated with a rare earth giant magnetostrictive material film;

[0012] A plurality of electric connection points are arranged on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire respectively, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are bridged through the electric connection points, and the antenna radiates after being electrified.

[0013] Optionally, the concentric spiral circular rings adopt an Archimedes spiral structure, and the spiral piezoelectric ceramic wires are Archimedes spiral piezoelectric ceramic wires.

[0014] Optionally, the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are respectively provided with piezoelectric ceramic wires in the radial direction from the center of the circle, the two piezoelectric ceramic wires are arranged on the same straight line and are not connected at the center of the circle, the piezoelectric ceramic wires of the Archimedes spiral structure are connected through the extension direction of the radial direction.

[0015] Optionally, the shapes of the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are the same, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are arranged in a double-layer spiral structure and vertically correspond to each other, and the shapes of the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are the same.

[0016] The positive electrode metal copper wire bridge corresponds to the first spiral piezoelectric ceramic wire, and the negative electrode metal copper wire bridge corresponds to the second spiral piezoelectric ceramic wire.

[0017] Optionally, a silicon dielectric substrate is arranged below the two spiral piezoelectric ceramic wires.

[0018] The two metal copper wire bridges, the two spiral piezoelectric ceramic wires and the silicon dielectric substrate are arranged in the order from top to bottom.

[0019] Optionally, the rare earth giant magnetostrictive material film is a Terfenol-D film.

[0020] Optionally, the electric connection points are arranged on the surface of the lithium cobalt oxide coating of the first spiral piezoelectric ceramic wire.

[0021] The electric connection points are arranged on the surface of the silver chloride coating of the second spiral piezoelectric ceramic wire.

[0022] Optionally, the arrangement of the electric connection points on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire respectively includes:

[0023] By adjusting the number of the electric connection points on the surface of the lithium cobalt oxide coating and the silver chloride coating, the vibration of the two spiral piezoelectric ceramic wires is controlled, so that the rare earth giant magnetostrictive material Terfenol-D film radiates a circularly polarized electromagnetic wave with a specified polarization direction or a vortex.

[0024] Optionally, the bridging by the electric connection points includes:

[0025] Based on the preset number of the electric connection points, the positive electrode metal copper wire bridge is connected to the first spiral piezoelectric ceramic wire at the position of the electric connection point, and the negative electrode metal copper wire bridge is connected to the second spiral piezoelectric ceramic wire at the position of the electric connection point.

[0026] Optionally, the process of the antenna radiating after being powered on includes:

[0027] The voltage applied to the positive electrode metal copper wire bridge and the negative electrode metal copper wire bridge is adjusted, the current frequency generated on the surface of the lithium cobalt oxide coating and the silver chloride coating is changed through the electric connection points, the vibration frequency of the two spiral piezoelectric ceramic wires is changed, and then the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film is changed, so that the antenna radiates an electromagnetic wave in the frequency band from low frequency to megahertz.

[0028] Compared with the prior art, the present application has the following advantages and technical effects:

[0029] The application provides a multi-point driving piezoelectric wideband antenna, in which a rare earth giant magnetostrictive material Terfenol-D film can form uniform current and generate vortex or circularly polarized electromagnetic waves through multi-point driving under the flutter of Archimedes spiral piezoelectric ceramic wires, specifically, two Archimedes spiral piezoelectric ceramic wires are respectively coated with lithium cobalt oxide and silver chloride coatings, and the electric connection points on the two wires are respectively bridged together by metal copper wires, so that uniform vortex current is formed on the surfaces of the lithium cobalt oxide and silver chloride. By adjusting the number of electric connection points on the surfaces of the lithium cobalt oxide and silver chloride, the current on the surfaces of the lithium cobalt oxide and silver chloride presents uniform vortex change, under the excitation of the vortex current, the Archimedes spiral piezoelectric ceramic wires transmit the vibration frequency to the rare earth giant magnetostrictive material Terfenol-D film to convert into electromagnetic waves, and then form an extremely wideband vortex antenna. Compared with a traditional antenna, the antenna has a simple structure and high circular polarization degree due to the spiral structure, and the antenna will not cause impedance mismatch due to frequency change, so that stable work in a wide frequency band is ensured, and good radiation and receiving performance can be realized in a wide frequency range. Since the polarization direction of electromagnetic waves in nature is random, the Archimedes spiral structure is further adopted on the basis of the spiral structure, so that electromagnetic waves in various directions can be received at the same time, and the receiving sensitivity is greatly improved. In terms of transmission, the rotating polarization characteristic of the Archimedes spiral antenna can make the transmitted electromagnetic waves maintain a good polarization state during propagation, thereby improving the stability and transmission distance of signals. The unique electric connection point regulation vortex current, and then the regulation mode of extremely wideband circular polarization and vortex antenna switching also enriches the working mode of the antenna, and can meet the needs of various application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an explanation of the present application, and do not constitute improper limitations on the present application. In the drawings:

[0031] Figure 1 A structural schematic diagram of the multi-point driving piezoelectric wideband antenna of the embodiment of the present application;

[0032] Figure 2 A cross-sectional view of the two Archimedes spiral piezoelectric ceramic wires of the multi-point driving piezoelectric wideband antenna of the embodiment of the present application.

[0033] The reference signs include: 1, positive electrode metal copper wire bridge; 2, negative electrode metal copper wire bridge; 3, Archimedes spiral piezoelectric ceramic wire; 31, lithium cobalt oxide coating; 32, silver chloride coating; 33, rare earth giant magnetostrictive material Terfenol-D film; 4, silicon dielectric substrate; and 5, electric connection point. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in a different order.

[0036] Further description is made for the above-mentioned content:

[0037] The multi-point driving piezoelectric wideband antenna designed in the present application can realize continuous regulation of electromagnetic waves from low frequency to megahertz, and can form uniform current to generate vortex or circularly polarized electromagnetic waves through multi-point driving, realizing flexible regulation of vortex or circularly polarized electromagnetic waves.

[0038] In order to solve the problems of structure simplification, wideband coverage and polarization controllability of piezoelectric antennas, the present application provides a multi-point driving piezoelectric wideband antenna, which aims to realize wideband continuous regulation through voltage excitation, and combines the vortex current regulation vortex and circular polarization method to form a multi-point driving piezoelectric antenna that meets the requirements of wideband coverage, and realizes the vortex and polarization controllability of the radiated electromagnetic waves.

[0039] Embodiment one

[0040] The multi-point driving piezoelectric wideband antenna provided in the embodiment includes:

[0041] Two metal copper wire bridges and two spiral piezoelectric ceramic wires;

[0042] The two metal copper wire bridges include a positive electrode metal copper wire bridge 1 and a negative electrode metal copper wire bridge 2;

[0043] Among them, the two spiral piezoelectric ceramic wires include a first spiral piezoelectric ceramic wire coated with a lithium cobaltate coating 31 and a second spiral piezoelectric ceramic wire coated with a silver chloride coating 32;

[0044] The shapes of the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are concentric spiral circular rings, the shapes of the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are the same, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in a double-layer spiral structure, and they are vertically corresponding to each other;

[0045] The outer surfaces of the lithium cobaltate coating 31 and the silver chloride coating 32 are plated with a rare earth giant magnetostrictive material film;

[0046] A plurality of pairs of electric connection points 5 are arranged on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire respectively; the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are bridged through the electric connection points 5, and the antenna radiates after being electrified.

[0047] Specifically, the antenna comprises: a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedes spiral piezoelectric ceramic wires 3, a lithium cobaltate coating 31, a silver chloride coating 32, a Terfenol-D film of rare earth giant magnetostrictive material 33, a silicon dielectric substrate 4, and a plurality of pairs of electric connection points 5 which are similar to a pair of electric connection points 5.

[0048] The two Archimedes spiral piezoelectric ceramic wires 3 are respectively coated with the lithium cobaltate coating 31 and the silver chloride coating 32 and are placed on the silicon dielectric substrate 4.

[0049] The positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are placed on the two Archimedes spiral piezoelectric ceramic wires 3 and are connected with the plurality of pairs of electric connection points 5 which are similar to a pair of electric connection points 5 on the lithium cobaltate coating 31 and the silver chloride coating 32 respectively, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are connected with the positive and negative poles of the battery respectively.

[0050] As an embodiment in the present embodiment, the concentric spiral circular ring adopts an Archimedes spiral structure, and the spiral piezoelectric ceramic wire is an Archimedes spiral piezoelectric ceramic wire 3.

[0051] As an embodiment in the present embodiment, the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are respectively provided with piezoelectric ceramic wires in the radial direction with the center as the starting point, the two piezoelectric ceramic wires are arranged on the same straight line and are not connected at the center, and the piezoelectric ceramic wires of the Archimedes spiral structure are connected by the extension direction of the radial direction.

[0052] As an embodiment in the present embodiment, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires have the same shape, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires form a double-layer spiral structure, and the two metal copper wire bridges and the two spiral piezoelectric ceramic wires vertically correspond to each other, comprising:

[0053] The positive electrode metal copper wire bridge 1 corresponds to the first spiral piezoelectric ceramic wire, and the negative electrode metal copper wire bridge 2 corresponds to the second spiral piezoelectric ceramic wire.

[0054] As an embodiment in the present embodiment, a silicon dielectric substrate 4 is arranged below the two spiral piezoelectric ceramic wires.

[0055] The two metal copper wire bridges, the two spiral piezoelectric ceramic wires and the silicon dielectric substrate 4 are arranged in the order from top to bottom.

[0056] As an embodiment in the present embodiment, the rare earth giant magnetostrictive material film adopts a rare earth giant magnetostrictive material Terfenol-D film 33.

[0057] As an embodiment in the present embodiment, the electric connection point 5 is arranged on the surface of the lithium cobaltate coating 31 of the first spiral piezoelectric ceramic wire.

[0058] The electric connection point 5 is arranged on the surface of the silver chloride coating 32 of the second spiral piezoelectric ceramic wire.

[0059] As an embodiment in the present embodiment, the electric connection points 5 arranged on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire respectively include:

[0060] By adjusting the number of the electric connection points 5 on the surface of the lithium cobaltate coating 31 and the silver chloride coating 32, the vibration of the two spiral piezoelectric ceramic wires is controlled, so that the rare earth giant magnetostrictive material Terfenol-D film 33 radiates a vortex or a circularly polarized electromagnetic wave with a specified polarization direction.

[0061] Specifically, the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are arranged on the two Archimedes spiral piezoelectric ceramic wires 3 and connected with the multiple electric connection points on the lithium cobaltate coating 31 and the silver chloride coating 32 respectively, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are connected with the positive and negative electrodes of the battery respectively. Under the driving of the direct current voltage, uniform vortex current is formed on the surface of the lithium cobaltate and the silver chloride, so that the two Archimedes spiral piezoelectric ceramic wires 3 produce corresponding micro deformation and transmit the vibration of the same frequency to the rare earth giant magnetostrictive material Terfenol-D film 33, and then the vibration is converted into electromagnetic waves with the same frequency and the same direction.

[0062] Specifically, the vortex and polarization controllable characteristics are realized by adjusting the number of the electric connection points. By adjusting the number of the electric connection points on the surface of the lithium cobaltate and the silver chloride, the current on the surface of the lithium cobaltate and the silver chloride presents uniform vortex change, and then the vibration of the Archimedes spiral piezoelectric ceramic wire is controlled, so that the rare earth giant magnetostrictive material Terfenol-D film radiates a vortex or a circularly polarized electromagnetic wave with a specified polarization direction.

[0063] As an embodiment in the present embodiment, the bridging mode of the electric connection point 5 includes:

[0064] Based on the preset number of the electric connection points 5, the positive electrode metal copper wire bridge 1 is connected with the first spiral piezoelectric ceramic wire at the position of the electric connection point 5, and the negative electrode metal copper wire bridge 2 is connected with the second spiral piezoelectric ceramic wire at the position of the electric connection point 5.

[0065] As an embodiment in the present embodiment, the process of the antenna radiating after being powered on includes:

[0066] Adjusting the voltage applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 changes the frequency of the current generated on the surface of the lithium cobalt oxide coating 31 and the silver chloride coating 32 through the electrical connection point 5, so as to change the vibration frequency of the two spiral piezoelectric ceramic wires, and further change the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film 33, thereby radiating electromagnetic waves in the low frequency to megahertz band.

[0067] Specifically, the extremely wide frequency coverage characteristic is realized by changing the voltage applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2. The voltage applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 can be adjusted to generate uniform vortex current with continuous frequency change on the surface of the lithium cobalt oxide coating 31 and the silver chloride coating 32 through the electrical connection point, change the vibration frequency of the Archimedes spiral piezoelectric ceramic wire 3, and further change the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film 33, thereby radiating electromagnetic waves with wide frequency and continuity. Thus, the low frequency to megahertz band wideband characteristic can be realized.

[0068] Based on this, the application provides a multi-point driving piezoelectric wideband antenna. In the antenna system, the rare earth giant magnetostrictive material Terfenol-D film can form uniform current and generate vortex or circularly polarized electromagnetic waves through multi-point driving under the flutter of the Archimedes spiral piezoelectric ceramic wire. Specifically, the two Archimedes spiral piezoelectric ceramic wires are respectively coated with lithium cobalt oxide and silver chloride coating, and the electrical connection points thereon are bridged together by metal copper wire to form uniform vortex current on the surface of the lithium cobalt oxide and the silver chloride. By adjusting the number of electrical connection points on the surface of the lithium cobalt oxide and the silver chloride, the current on the surface of the lithium cobalt oxide and the silver chloride presents uniform vortex change. Under the excitation of the vortex current, the Archimedes spiral piezoelectric ceramic wire transmits the vibration frequency to the rare earth giant magnetostrictive material Terfenol-D film to convert it into electromagnetic waves, and further forms an extremely wide frequency vortex antenna. Compared with the traditional antenna, the antenna has a simple structure and high circular polarization degree due to the spiral structure. Moreover, the antenna will not cause impedance mismatch due to frequency change, thereby ensuring stable operation in the wideband. The antenna can realize good radiation and reception performance in a wide frequency range. Since the polarization direction of electromagnetic waves in nature is random, the Archimedes spiral structure can receive electromagnetic waves in various directions at the same time based on the spiral structure, thereby greatly improving the reception sensitivity. In terms of transmission, the rotating polarization characteristic of the Archimedes spiral antenna can maintain a good polarization state of the transmitted electromagnetic waves during propagation, thereby improving the stability and transmission distance of the signal. The unique electrical connection point regulation vortex current, and further regulation of the extremely wide frequency circular polarization and vortex antenna switching mode also enriches the working mode of the antenna, and can meet the needs of various application scenarios.

[0069] Embodiment two

[0070] The embodiment discloses a multi-point driving piezoelectric wideband antenna, which comprises a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedes spiral piezoelectric ceramic wires 3, a lithium cobaltate coating 31, a silver chloride coating 32, a rare earth giant magnetostrictive material Terfenol-D film 33, a silicon dielectric substrate 4 and a plurality of pairs of electric connection points 5.

[0071] The two Archimedes spiral piezoelectric ceramic wires 3 are respectively coated with the lithium cobaltate coating 31 and the silver chloride coating 32 and are arranged on the silicon dielectric substrate 4.

[0072] The positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are arranged on the two Archimedes spiral piezoelectric ceramic wires 3 and are connected with the plurality of pairs of electric connection points 5 on the lithium cobaltate coating 31 and the silver chloride coating 32 respectively, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are connected with the positive and negative poles of a battery respectively, so that uniform vortex currents are formed on surfaces of the lithium cobaltate and the silver chloride. By adjusting the number of the electric connection points on the surfaces of the lithium cobaltate and the silver chloride, the surface currents of the lithium cobaltate and the silver chloride present uniform vortex changes, and under the excitation of the vortex currents, the two Archimedes spiral piezoelectric ceramic wires 3 transmit vibration frequencies to the rare earth giant magnetostrictive material Terfenol-D film 33 and convert the vibration frequencies into electromagnetic waves,

[0073] and the vortex or polarization of the electromagnetic waves is regulated by the vortex currents. The wideband characteristic is realized by changing voltages applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2, and by adjusting the voltages applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2, the current frequency generated on the surfaces of the lithium cobaltate coating 31 and the silver chloride coating 32 through the electric connection points will continuously change, the vibration frequency of the Archimedes spiral piezoelectric ceramic wire 3 changes, and then the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film 33 changes, so that the coverage from low frequency to megahertz frequency band can be realized, and a polarized wideband vortex antenna is formed.

[0074] In order to solve the problems of structure simplification, wideband coverage and polarization controllability of the piezoelectric antenna, the application provides a multi-point driving piezoelectric wideband antenna, which aims to realize wideband continuous regulation by voltage excitation and combines the vortex current regulation vortex and circular polarization method to form a multi-point driving piezoelectric antenna that meets the coverage of wideband, and realizes the vortex and polarization controllability of the radiated electromagnetic waves.

[0075] Embodiment three

[0076] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the application will be further described in detail in combination with the drawings and specific embodiments.

[0077] Reference Figure 1 and Figure 2 The application provides an Archimedes spiral piezoelectric ceramic wire, comprising: a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedes spiral piezoelectric ceramic wires 3, a lithium cobaltate coating layer 31, a silver chloride coating layer 32, a rare earth giant magnetostrictive material Terfenol-D film 33, a silicon dielectric substrate 4, and a plurality of pairs of electrical connection points 5.

[0078] The positive electrode metal copper wire bridge 1, the negative electrode metal copper wire bridge 2, the two Archimedes spiral piezoelectric ceramic wires 3, and the silicon dielectric substrate 4 are bonded together from top to bottom; the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 form a pair of Archimedes spiral structures and are spliced together; the two Archimedes spiral piezoelectric ceramic wires 3 form a pair of Archimedes spiral structures and are spliced together.

[0079] The two Archimedes spiral piezoelectric ceramic wires 3 are respectively coated with the lithium cobaltate coating layer 31 and the silver chloride coating layer 32, so that the lithium cobaltate coating layer 31 and the silver chloride coating layer 32 form a pair of Archimedes spiral structures and are consistent with the structures of the two Archimedes spiral piezoelectric ceramic wires 3, and are used to generate eddy currents to excite the Archimedes spiral piezoelectric ceramic wire to vibrate.

[0080] The lithium cobaltate coating layer 31 and the silver chloride coating layer 32 are uniformly distributed with a plurality of pairs of electrical connection points, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are respectively connected with the electrical connection points on the lithium cobaltate coating layer 31 and the silver chloride coating layer 32 to form a multi-point driving positive electrode and a multi-point driving negative electrode, and the positive electrode and the negative electrode are respectively connected with positive and negative poles of a battery, so that under the driving of a direct current voltage, eddy currents are formed on the lithium cobaltate coating layer 31 and the silver chloride coating layer 32 through the electrical connection points.

[0081] The outer layers of the lithium cobaltate coating layer 31 and the silver chloride coating layer 32 are respectively coated with a rare earth giant magnetostrictive material Terfenol-D film, which is used to generate a same-frequency vibration under the excitation of the vibration of the Archimedes spiral piezoelectric ceramic wire and radiate electromagnetic waves.

[0082] The voltage applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 is adjusted, the frequency of the current generated on the surfaces of the lithium cobaltate coating layer 31 and the silver chloride coating layer 32 through the electrical connection points is continuously changed, the vibration frequency of the Archimedes spiral piezoelectric ceramic wire 3 is changed, and then the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film 33 is changed, so that electromagnetic waves in a low frequency to a megahertz frequency band are radiated, and thus a wideband characteristic can be realized.

[0083] Adjusting the number of surface electrical connection points of the lithium cobalt oxide coating 31 and the silver chloride coating 32, the surface current of the lithium cobalt oxide coating 31 and the silver chloride coating 32 will present uniform vortex changes, thereby regulating the vibration of the two Archimedes spiral piezoelectric ceramic wires 3, so that the rare earth super-magnetostrictive material Terfenol-D film 33 radiates vortex or circularly polarized electromagnetic waves with a specified polarization direction.

[0084] Based on the above-mentioned mechanism of electromagnetic wave radiation, a corresponding direct current voltage is applied to the positive and negative electrodes to realize continuous regulation of the low-frequency to megahertz antenna, and the number of surface electrical connection points of the lithium cobalt oxide and silver chloride is adjusted, so that the Archimedes spiral piezoelectric ceramic wire is vibrated and the rare earth super-magnetostrictive material Terfenol-D film is excited to radiate electromagnetic waves with different vortex or circular polarization conditions, thereby enhancing the radiation performance of the antenna and widening the application range.

[0085] Through the spiral and layered structure designed with care, the multi-point driving piezoelectric wideband antenna system realizes integration and miniaturization in structure. The positive and negative electrode metal copper wire bridges and the two Archimedes spiral piezoelectric ceramic wires are all set as Archimedes spiral structures and are spliced together, which takes full advantage of the spiral structure and makes full use of the design space; the positive and negative electrode metal copper wire bridges, the two Archimedes spiral piezoelectric ceramic wires, and the silicon dielectric substrate and other key components all adopt precise bottom-up bonding technology to realize compact layout. This fine and compact layout mode is helpful to realize miniaturization and portable design of the antenna system, and is also convenient for the antenna system to be deployed in a situation with relatively harsh space conditions, thereby improving the practicality of the antenna system.

[0086] Through continuous regulation of the direct current voltage to realize the characteristics of covering the low-frequency to megahertz frequency band, the multi-point driving piezoelectric wideband antenna system designed by the application is helpful to meet the needs of regulating electromagnetic waves of multiple frequency bands, realize the reception, monitoring and distribution of wideband electromagnetic waves; at the same time, in the field of communication, the ultra-wideband characteristic is helpful to utilize a wider frequency domain, improve the utilization rate of frequency spectrum resources and communication efficiency and quality.

[0087] The unique function of adjusting the number of electrical connection points to regulate the radiation of vortex or circularly polarized electromagnetic waves enables the multi-point driving piezoelectric wideband antenna system designed by the application to make full use of the properties of electromagnetic waves, adapt to a wider range of application situations, such as multi-modal electromagnetic wave reception and propagation, and show important application potential in the fields of radar imaging and wireless communication.

[0088] In summary, compared with other conventional antennas with low spectrum utilization and complex feed network design, the multi-point driving piezoelectric wideband antenna system designed in the application optimizes the structure design, realizes extremely wideband characteristics, and makes the vortex and polarization properties of the radiated electromagnetic waves controllable.

[0089] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-point driven piezoelectric broadband antenna, characterized in that: The following steps are involved: Two metallic copper wire bridges and two spiral piezoelectric ceramic wires; The two metal copper wire bridges include a positive electrode metal copper wire bridge (1) and a negative electrode metal copper wire bridge (2); The two spiral piezoelectric ceramic wires include a first spiral piezoelectric ceramic wire coated with a lithium cobalt oxide coating (31) and a second spiral piezoelectric ceramic wire coated with a silver chloride coating (32); The first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are shaped like concentric spiral rings, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are of the same shape, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in a double-layer spiral structure, and are perpendicular to each other; The outer surfaces of the lithium cobalt oxide coating (31) and the silver chloride coating (32) are both coated with rare earth giant magnetostrictive material films; A plurality of pairs of electrical connection points (5) are respectively provided on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire; two metal copper wire bridges and two spiral piezoelectric ceramic wires are bridged via the electrical connection points (5), and the antenna radiates after being energized.

2. The antenna according to claim 1, wherein The concentric spiral rings adopt an Archimedean spiral structure, and the spiral piezoelectric ceramic wire is an Archimedean spiral piezoelectric ceramic wire (3).

3. The antenna according to claim 2, wherein: Also includes: The first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are respectively provided with piezoelectric ceramic wires in a radial direction starting from the center of the circle. The two piezoelectric ceramic wires are arranged on the same straight line and are not connected at the center of the circle. Along the extension line direction of the radial direction, the straight piezoelectric ceramic wire connects the piezoelectric ceramic wire of the Archimedean spiral structure.

4. The antenna according to claim 2, wherein: The two metal copper wire bridges and the two spiral piezoelectric ceramic wires have the same shape, and the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in a double-layer spiral structure and correspond vertically to each other. The positive electrode metal copper wire bridge (1) corresponds to the first spiral piezoelectric ceramic wire, and the negative electrode metal copper wire bridge (2) corresponds to the second spiral piezoelectric ceramic wire.

5. The antenna according to claim 2, wherein: A silicon dielectric substrate (4) is provided below the two spiral piezoelectric ceramic wires; Two metal copper wire bridges, two spiral piezoelectric ceramic wires and a silicon dielectric substrate (4) are arranged in order from top to bottom.

6. The antenna according to claim 1, wherein The rare earth giant magnetostrictive material film adopts rare earth giant magnetostrictive material Terfenol-D film (33).

7. The antenna according to claim 2, wherein: Setting the electrical connection point (5) comprises: setting the electrical connection point (5) on the surface of the lithium cobalt oxide coating (31) of the first spiral piezoelectric ceramic wire; An electrical connection point (5) is provided on the surface of the silver chloride coating (32) of the second spiral piezoelectric ceramic wire.

8. The antenna according to claim 7, characterized in that A plurality of pairs of electrical connection points (5) are respectively provided on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire, including: By adjusting the number of electrical connection points (5) on the surfaces of the lithium cobalt oxide coating (31) and the silver chloride coating (32), the vibration of the two spiral piezoelectric ceramic wires is regulated, so that the rare earth giant magnetostrictive material Terfenol-D film (33) radiates vortex or circularly polarized electromagnetic waves with a specified polarization direction.

9. The antenna according to claim 1, wherein: The bridging method through the electrical connection point (5) includes: Based on the preset number of electrical connection points (5), the positive electrode metal copper wire bridge (1) is correspondingly connected to the first spiral piezoelectric ceramic wire, and the negative electrode metal copper wire bridge (2) is correspondingly connected to the second spiral piezoelectric ceramic wire at the positions of the electrical connection points (5).

10. The antenna according to claim 6, wherein: The process of antenna radiation after power is turned on includes: By adjusting the voltage applied to the positive electrode metal copper wire bridge (1) and the negative electrode metal copper wire bridge (2), the frequency of the current generated on the surface of the lithium cobalt oxide coating (31) and the silver chloride coating (32) is changed through the electrical connection point (5), so as to change the vibration frequency of the two spiral piezoelectric ceramic wires, thereby causing the resonance frequency of the rare earth giant magnetostrictive material Terfenol-D film (33) to change, thereby radiating electromagnetic waves in the low frequency to megahertz frequency band.

Images