Multi-point driving piezoelectric electrode broadband antenna

Abstract

The invention discloses a multi-point driving piezoelectric electrode broadband antenna which comprises a positive electrode metal copper wire bridge, a negative electrode metal copper wire bridge, two Archimedes spiral piezoelectric ceramic wires, a lithium cobalt oxide coating, a silver chloride coating, a rare earth giant magnetostrictive material Terfenol-D film, a silicon dielectric substrate and a plurality of pairs of electric connection points in the same shape. The two Archimedes spiral piezoelectric ceramic wires are respectively coated with a lithium cobalt oxide coating and a silver chloride coating, and are arranged on the silicon dielectric substrate. Vortex current is formed through regulation and control of the electric connection points, switching between ultra-wideband circular polarization and a vortex antenna is achieved, and high sensitivity and stability are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of extremely broadband electromagnetic wave transceivers and antennas, and in particular to a multi-point driven piezoelectric broadband antenna. Background Art

[0002] With the rapid development of wireless communication technology, the demand for broadband, circularly polarized and vortex antennas is increasing to meet the needs of wide coverage frequency bands and high communication capacity. In modern communications, many frequency bands have been used, and spectrum resources are becoming increasingly scarce. In addition, as communication technology is now developing towards millimeter wave and very low frequency bands, the coverage frequency of electromagnetic waves is getting wider and wider. Therefore, it is crucial for antennas to sense the spectrum within an extremely wide frequency band. At the same time, circularly polarized antennas are often used in remote sensing, satellite communications, and military and civilian mobile communications due to their unique polarization characteristics. Circular polarization can effectively reduce signal interference caused by multipath propagation, improve the reliability and anti-noise capability 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, which reflects a new degree of freedom in addition to the traditional degrees of freedom such as intensity, phase, frequency, and polarization. In theory, there are infinite orthogonal modes that do not interfere with each other at any frequency, so it shows important application potential in radar imaging, wireless communication and other fields.

[0004] In addition, compared with the design of the traditional complex feeding network, the polarized antenna based on multi-point drive often has a simpler and more efficient design structure, and the polarization direction of the electromagnetic wave can be changed by changing the number of electrical connection points between the electrode and the antenna system. Therefore, this type of antenna can adjust the working state of the antenna in a more flexible way, and then radiate electromagnetic waves of different frequency bands and polarization modes. Therefore, the defects of the prior art are mainly reflected in the difficulty of frequency controllability of the antenna, and it is difficult to achieve broadband frequency control and polarization control at the same time. Although circularly polarized antennas and vortex antennas have potential in improving system performance and spectrum efficiency, they cannot meet the design of polarization control and vortex antenna transformation in actual design, and it is necessary to change the structure of the antenna to achieve the design of polarization and vortex antennas. Therefore, in actual applications, it still faces problems such as complex antenna design. In order to simplify the structural design of the antenna, and simultaneously realize polarization control, vortex control and extremely wideband coverage control to adapt to a wider range of frequency bands and polarization requirements, there is an urgent need for a solution to the problems existing in the above-mentioned prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a multi-point driven piezoelectric wideband antenna, which can not only meet the needs of covering wideband electromagnetic waves, but also radiate vortex or circularly polarized electromagnetic waves. While simplifying the antenna design, it improves the communication system capacity and combats multipath and environmental interference, so as to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides a multi-point driven piezoelectric wideband antenna, comprising the following steps:

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

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

[0009] Wherein, the two spiral piezoelectric ceramic wires include a first spiral piezoelectric ceramic wire coated with a lithium cobalt oxide coating and a second spiral piezoelectric ceramic wire coated with a silver chloride coating;

[0010] The first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are in the shape of concentric spiral rings, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in 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;

[0011] The outer surfaces of the lithium cobalt oxide coating and the silver chloride coating are coated with rare earth giant magnetostrictive material films;

[0012] A plurality of electrical connection points are respectively arranged 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 through the electrical connection points, and the antenna radiates after being powered on.

[0013] Optionally, the concentric spiral rings adopt an Archimedean spiral structure, and the spiral piezoelectric ceramic wire is an Archimedean spiral piezoelectric ceramic wire.

[0014] Optionally, it 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, and along the extension line direction of the radial direction, the straight piezoelectric ceramic wire connects the piezoelectric ceramic wire of the Archimedean spiral structure.

[0015] Optionally, 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 are in a double-layer spiral structure, and are vertically corresponding to each other, including:

[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 provided below the two spiral piezoelectric ceramic wires;

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

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

[0020] Optionally, setting the electrical connection point includes: setting the electrical connection point on the surface of the lithium cobalt oxide coating of the first spiral piezoelectric ceramic wire;

[0021] An electrical connection point is provided on the silver chloride coated surface of the second spiral piezoelectric ceramic wire.

[0022] Optionally, a plurality of electrical connection points are respectively provided on the first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire, including:

[0023] By adjusting the number of electrical connection points on the surfaces of the lithium cobalt oxide coating and the silver chloride coating and regulating the vibration of the two spiral piezoelectric ceramic wires, the rare earth giant magnetostrictive material Terfenol-D film can radiate vortex or circularly polarized electromagnetic waves with a specified polarization direction.

[0024] Optionally, the bridging method through the electrical connection point includes:

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

[0026] Optionally, the process of the antenna radiating after power is turned on includes:

[0027] By adjusting the voltage applied to the positive electrode metal copper wire bridge and the negative electrode metal copper wire bridge, the current frequency generated on the surface of the lithium cobalt oxide coating and the silver chloride coating is changed through the electrical connection point, so as to change the vibration frequency of the two spiral piezoelectric ceramic wires, thereby causing the resonant frequency of the rare earth giant magnetostrictive material Terfenol-D film to change, radiating electromagnetic waves in the low frequency to megahertz frequency band.

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

[0029] The present invention provides a multi-point driven piezoelectric broadband antenna. In the antenna system, a rare earth giant magnetostrictive material Terfenol-D film can form a uniform current and generate a vortex or circularly polarized electromagnetic wave through multi-point driving under the vibration of an Archimedean spiral piezoelectric ceramic wire. Specifically, two Archimedean spiral piezoelectric ceramic wires are respectively coated with lithium cobalt oxide and silver chloride coatings, and the electrical connection points thereon are bridged together with metal copper wires to form a uniform vortex current on the surface of the lithium cobalt oxide and silver chloride. By adjusting the number of electrical connection points on the surface of the lithium cobalt oxide and silver chloride, the surface current of the lithium cobalt oxide and silver chloride presents a uniform vortex change. Under the excitation of the vortex current, the Archimedean spiral piezoelectric ceramic wire transmits the vibration frequency to the rare earth giant magnetostrictive material Terfenol-D film to convert it into an electromagnetic wave, thereby forming an extremely broadband vortex antenna. Compared with traditional antennas, this antenna has a simple structure and a high degree of circular polarization due to its spiral structure. The antenna will not cause impedance mismatch due to frequency changes, thus ensuring stable operation within a wide band and achieving good radiation and reception performance within a wide frequency range. Since the polarization direction of electromagnetic waves in nature is random, the Archimedean spiral structure is further adopted on the basis of the spiral structure, so that electromagnetic waves from various directions can be received at the same time, greatly improving the sensitivity of reception. In terms of transmission, the rotating polarization characteristics of the Archimedean spiral antenna can enable the transmitted electromagnetic waves to maintain a good polarization state during propagation, thereby improving the stability of the signal and the transmission distance. The unique electrical connection point regulates the vortex current, and then switches between extremely wideband circular polarization and vortex antennas, which also enriches the working mode of the antenna and can meet the needs of various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 It is a structural schematic diagram of a multi-point driven piezoelectric wideband antenna according to an embodiment of the present invention;

[0032] Figure 2 It is a cross-sectional view of two Archimedean spiral piezoelectric ceramic wires of the multi-point driven piezoelectric wideband antenna according to an embodiment of the present invention.

[0033] The reference numerals include: 1. positive electrode metal copper wire bridge; 2. negative electrode metal copper wire bridge; 3. Archimedean 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; 5. electrical connection point. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

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

[0036] Further description of the above mentioned content:

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

[0038] In order to meet the needs of structural simplification, wide frequency band coverage and polarization controllable of piezoelectric antennas, the present invention provides a multi-point driven piezoelectric wide-band antenna, which aims to achieve wide-band continuous regulation through voltage excitation, and combines the proposed vortex current to control vortex and circular polarization, thereby forming a multi-point driven piezoelectric antenna that can cover an extremely wide frequency band, and realize the controllable vortex and polarization of the radiated electromagnetic waves.

[0039] Embodiment 1

[0040] This embodiment provides a multi-point driven piezoelectric wideband antenna, including:

[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] 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;

[0044] The first spiral piezoelectric ceramic wire and the second spiral piezoelectric ceramic wire are in the shape of concentric spiral rings, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in 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;

[0045] The outer surfaces of the lithium cobalt oxide coating 31 and the silver chloride coating 32 are coated with rare earth giant magnetostrictive material films;

[0046] A plurality of pairs of electrical connection points 5 are respectively arranged 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 through the electrical connection points 5, and the antenna radiates after being powered on.

[0047] Specifically, the antenna includes: a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedean spiral piezoelectric ceramic wires 3, a lithium cobalt oxide coating 31, a silver chloride coating 32, a rare earth giant magnetostrictive material Terfenol-D film 33, a silicon dielectric substrate 4, and multiple pairs of electrical connection points in the form of a pair of electrical connection points 5.

[0048] The two Archimedean spiral piezoelectric ceramic wires 3 are coated with a lithium cobalt oxide coating 31 and a silver chloride coating 32 respectively, and are placed on a 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 Archimedean spiral piezoelectric ceramic wires 3, and are respectively connected to multiple pairs of electrical connection points in the shape of a pair of electrical connection points 5 on the lithium cobalt oxide coating 31 and the silver chloride coating 32, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are respectively connected to the positive and negative poles of the battery.

[0050] As an implementation method in this embodiment, the concentric spiral rings adopt an Archimedean spiral structure, and the spiral piezoelectric ceramic wire is the Archimedean spiral piezoelectric ceramic wire 3 .

[0051] As an implementation method in this embodiment, it 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 with the center of the circle as the starting point, the two piezoelectric ceramic wires are arranged on the same straight line and are not connected at the center of the circle, and along the extension line direction of the radial direction, the straight piezoelectric ceramic wire connects the piezoelectric ceramic wire of the Archimedean spiral structure.

[0052] As an implementation method of this 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 are in a double-layer spiral structure, and are vertically corresponding to each other, including:

[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 implementation method in this embodiment, a silicon dielectric substrate 4 is provided below the two spiral piezoelectric ceramic wires;

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

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

[0057] As an implementation method in this embodiment, setting the electrical connection point 5 includes: setting the electrical connection point 5 on the surface of the lithium cobalt oxide coating 31 of the first spiral piezoelectric ceramic wire;

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

[0059] As an implementation method of this embodiment, 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:

[0060] By adjusting the number of electrical connection points 5 on the surface of the lithium cobalt oxide coating 31 and the silver chloride coating 32 and regulating the vibration of the two spiral piezoelectric ceramic wires, the rare earth giant magnetostrictive material Terfenol-D film 33 radiates vortex or circularly polarized electromagnetic waves 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 placed on the two Archimedean spiral piezoelectric ceramic wires 3, and are respectively connected to multiple pairs of electrical connection points in the form of a pair of electrical connection points 5 on the lithium cobalt oxide coating 31 and the silver chloride coating 32, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are respectively connected to the positive and negative electrodes of the battery. Driven by the DC voltage, a uniform eddy current is formed on the surface of the lithium cobalt oxide and the silver chloride, causing the two Archimedean spiral piezoelectric ceramic wires 3 to produce corresponding micro deformations, and transmit the same frequency vibration to the rare earth giant magnetostrictive material Terfenol-D film 33, which is then converted into electromagnetic waves of the same frequency and direction.

[0062] Specifically, the controllable characteristics of vortex and polarization are achieved by adjusting the number of electrical connection points. By adjusting the number of electrical connection points on the surfaces of lithium cobalt oxide and silver chloride, the surface currents of lithium cobalt oxide and silver chloride can show uniform vortex changes, thereby regulating the vibration of the Archimedean spiral piezoelectric ceramic wire and making the rare earth giant magnetostrictive material Terfenol-D film radiate vortices or circularly polarized electromagnetic waves with a specified polarization direction.

[0063] As an implementation method in this embodiment, the bridging method through the electrical connection point 5 includes:

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

[0065] As an implementation method of this embodiment, the process of the antenna radiating after power is turned on includes:

[0066] By adjusting the voltage 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 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 resonant frequency of the rare earth giant magnetostrictive material Terfenol-D film 33 to change, and radiate electromagnetic waves in the low frequency to megahertz frequency band.

[0067] Specifically, the extremely wide-band coverage characteristic is achieved by the voltage change 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 a uniform eddy current with a continuously changing frequency on the surface of the lithium cobalt oxide coating 31 and the silver chloride coating 32 through the electrical connection point, thereby changing the vibration frequency of the Archimedean spiral piezoelectric ceramic wire 3, and then changing the resonant frequency of the rare earth giant magnetostrictive material Terfenol-D film 33, radiating a wide-band and continuous electromagnetic wave, thereby achieving a broadband characteristic covering the low frequency to megahertz frequency band.

[0068] Based on this, the present invention provides a multi-point driven piezoelectric broadband antenna, in which the rare earth giant magnetostrictive material Terfenol-D film can form a uniform current and generate vortex or circular polarized electromagnetic waves through multi-point driving under the vibration of the Archimedean spiral piezoelectric ceramic wire, specifically, two Archimedean spiral piezoelectric ceramic wires are respectively coated with lithium cobalt oxide and silver chloride coatings, and the electrical connection points thereon are respectively bridged together with metal copper wires, so that a uniform vortex current is formed 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 surface current of the lithium cobalt oxide and the silver chloride presents a uniform vortex change, and under the excitation of the vortex current, the Archimedean spiral piezoelectric ceramic wire transmits the vibration frequency to the rare earth giant magnetostrictive material Terfenol-D film to convert it into an electromagnetic wave, thereby forming an extremely broadband vortex antenna. Compared with traditional antennas, this antenna has a simple structure and a high degree of circular polarization due to its spiral structure. The antenna will not cause impedance mismatch due to frequency changes, thus ensuring stable operation within a wide band and achieving good radiation and reception performance within a wide frequency range. Since the polarization direction of electromagnetic waves in nature is random, the Archimedean spiral structure is further adopted on the basis of the spiral structure, so that electromagnetic waves from various directions can be received at the same time, greatly improving the sensitivity of reception. In terms of transmission, the rotating polarization characteristics of the Archimedean spiral antenna can enable the transmitted electromagnetic waves to maintain a good polarization state during propagation, thereby improving the stability of the signal and the transmission distance. The unique electrical connection point regulates the vortex current, and then switches between extremely wideband circular polarization and vortex antennas, which also enriches the working mode of the antenna and can meet the needs of various application scenarios.

[0069] Embodiment 2

[0070] The present embodiment discloses a multi-point driven piezoelectric broadband antenna, comprising a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedean spiral piezoelectric ceramic wires 3, a lithium cobalt oxide coating 31, a silver chloride coating 32, a rare earth giant magnetostrictive material Terfenol-D film 33, a silicon dielectric substrate 4, and multiple pairs of electrical connection points in the form of a pair of electrical connection points 5.

[0071] The two Archimedean spiral piezoelectric ceramic wires 3 are coated with a lithium cobalt oxide coating 31 and a silver chloride coating 32 respectively, and are placed on a silicon dielectric substrate 4 .

[0072] The positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are placed on the two Archimedean spiral piezoelectric ceramic wires 3, and are respectively connected to multiple pairs of electrical connection points in the form of a pair of electrical connection points 5 on the lithium cobalt oxide coating 31 and the silver chloride coating 32, and the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are respectively connected to the positive and negative electrodes of the battery, so that a uniform eddy current is formed 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 surface current of the lithium cobalt oxide and the silver chloride presents a uniform eddy change, and under the excitation of the eddy current, the two Archimedean spiral piezoelectric ceramic wires 3 transmit the vibration frequency to the rare earth giant magnetostrictive material Terfenol-D film 33 and convert it into electromagnetic waves,

[0073] The vortex or polarization of the electromagnetic wave is regulated by the vortex current. The broadband characteristic is achieved by the voltage change applied to the positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2. By adjusting the voltage 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 surface of the lithium cobalt oxide coating 31 and the silver chloride coating 32 through the electrical connection point will change continuously, causing the vibration frequency of the Archimedean spiral piezoelectric ceramic wire 3 to change, and then causing the resonant frequency of the rare earth giant magnetostrictive material Terfenol-D film 33 to change, thereby achieving coverage of the low frequency to megahertz frequency band, forming a polarized extremely broadband vortex antenna.

[0074] In order to meet the needs of structural simplification, wide frequency band coverage and polarization controllable of piezoelectric antennas, the present invention provides a multi-point driven piezoelectric wide-band antenna, which aims to achieve wide-band continuous regulation through voltage excitation, and combines the proposed vortex current to control vortex and circular polarization, thereby forming a multi-point driven piezoelectric antenna that can cover an extremely wide frequency band, and realize the controllable vortex and polarization of the radiated electromagnetic waves.

[0075] Embodiment 3

[0076] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0077] refer to Figure 1 and Figure 2 The present invention provides an Archimedean spiral piezoelectric ceramic wire, comprising: a positive electrode metal copper wire bridge 1, a negative electrode metal copper wire bridge 2, two Archimedean spiral piezoelectric ceramic wires 3, a lithium cobalt oxide coating 31, a silver chloride coating 32, a rare earth giant magnetostrictive material Terfenol-D film 33, a silicon dielectric substrate 4, and multiple pairs of electrical connection points in the form of a pair of electrical connection points 5.

[0078] The structures of the positive electrode metal copper wire bridge 1, the negative electrode metal copper wire bridge 2, the two Archimedean 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 Archimedean spiral structures, which are spliced ​​together; the two Archimedean spiral piezoelectric ceramic wires 3 form a pair of Archimedean spiral structures, which are spliced ​​together;

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

[0080] A plurality of pairs of electrical connection points are evenly distributed on the lithium cobalt oxide coating 31 and the silver chloride coating 32. The positive electrode metal copper wire bridge 1 and the negative electrode metal copper wire bridge 2 are respectively connected to the electrical connection points on the lithium cobalt oxide coating 31 and the silver chloride coating 32 to form multi-point driven positive and negative electrodes. The positive and negative electrodes are respectively connected to the positive and negative poles of the battery. Driven by a DC voltage, eddy currents are formed on the lithium cobalt oxide coating 31 and the silver chloride coating 32 through the electrical connection points.

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

[0082] 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 through the electrical connection point will change continuously, causing the vibration frequency of the Archimedean spiral piezoelectric ceramic wire 3 to change, and then causing the resonant frequency of the rare earth giant magnetostrictive material Terfenol-D film 33 to change, radiating electromagnetic waves from low frequency to megahertz frequency band, thereby achieving broadband characteristics.

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

[0084] Based on the above-mentioned mechanism of electromagnetic wave radiation, corresponding DC voltages are applied to the positive and negative electrodes to achieve continuous regulation of the low-frequency to megahertz antenna. By adjusting the number of electrical connection points on the surfaces of lithium cobalt oxide and silver chloride, the Archimedean spiral piezoelectric ceramic wire is vibrated under the excitation of eddy current and the rare earth giant magnetostrictive material Terfenol-D film is stimulated to radiate electromagnetic waves with different vortex or circular polarization conditions, thereby enhancing the radiation performance of the antenna and broadening its application range.

[0085] Through the carefully designed spiral and layered structure, the multi-point driven piezoelectric wideband antenna system has achieved structural integration and miniaturization. The positive and negative electrode metal copper wire bridges and the two Archimedean spiral piezoelectric ceramic wires are all set as Archimedean spiral structures and are pieced together separately, which not only takes advantage of the unique advantages of the spiral structure, but also makes full use of the design space; key components such as the positive and negative electrode metal copper wire bridges, the two Archimedean spiral piezoelectric ceramic wires, and the silicon dielectric substrate all use precise bottom-up bonding technology to achieve a compact layout. This fine and compact layout mode helps to achieve miniaturization and convenient design of the antenna system, and also facilitates the deployment of the antenna system in situations with more stringent space conditions, improving the practicality of the antenna system.

[0086] By continuously regulating the DC voltage to achieve the characteristics of covering the low frequency to megahertz frequency band, the multi-point driven piezoelectric electrode wideband antenna system designed by the present invention helps to meet the needs of electromagnetic wave regulation in multiple frequency bands, and realizes the reception, monitoring and distribution of broadband electromagnetic waves; at the same time, in the field of communications, the extremely broadband characteristics help to utilize a wider frequency domain and improve the utilization rate of spectrum resources and communication efficiency and quality.

[0087] The unique function of adjusting the number of electrical connection points to control the radiation vortex or circularly polarized electromagnetic waves enables the multi-point driven piezoelectric wideband antenna system designed in the present invention to more fully utilize the inherent properties of electromagnetic waves and adapt to a wider range of application scenarios, such as multi-modal electromagnetic wave transmission and transmission, showing important application potential in radar imaging, wireless communications and other fields.

[0088] In summary, compared with other traditional antennas with low spectrum utilization and complex feeding network design, the multi-point driven piezoelectric wideband antenna system designed by the present invention achieves extremely wideband characteristics while optimizing the structural design, and at the same time makes the vortex and polarization properties of the radiated electromagnetic waves controllable. It can cover the low frequency to megahertz frequency band while flexibly adjusting the working state of the antenna, enriching the propagation mode of the electromagnetic wave, and has good practical value.

[0089] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A multi-point driven piezoelectric broadband antenna, characterized in that: The following steps are involved: Two metal 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 in the shape of concentric spiral rings, the two metal copper wire bridges and the two spiral piezoelectric ceramic wires are in 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 a rare earth giant magnetostrictive material film; A plurality of pairs of electrical connection points (5) are respectively arranged 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 powered on.

2. The antenna according to claim 1, characterized in that 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, characterized in that: 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 a 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, characterized in that: 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, including: 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, characterized in that: A silicon dielectric substrate (4) is arranged 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, characterized in that The rare earth giant magnetostrictive material film is a rare earth giant magnetostrictive material Terfenol-D film (33).

7. The antenna according to claim 2, characterized in that: 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 arranged 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 arranged 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, characterized in that: 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, characterized in that The process of antenna radiation after power is turned on includes: The voltage applied to the positive electrode metal copper wire bridge (1) and the negative electrode metal copper wire bridge (2) is adjusted to change 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, 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.

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