CN112736406B - Magnetic drive antenna based on folding magnetic film - Google Patents
Magnetic drive antenna based on folding magnetic film Download PDFInfo
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- CN112736406B CN112736406B CN202011643889.7A CN202011643889A CN112736406B CN 112736406 B CN112736406 B CN 112736406B CN 202011643889 A CN202011643889 A CN 202011643889A CN 112736406 B CN112736406 B CN 112736406B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/005—Thin magnetic films, e.g. of one-domain structure organic or organo-metallic films, e.g. monomolecular films obtained by Langmuir-Blodgett technique, graphene
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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
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
Abstract
The magnetic driving antenna based on the folding magnetic film comprises a magnetic film, a first insulating layer, a flexible antenna and a second insulating layer from bottom to top in sequence; the thickness of the flexible antenna is far smaller than that of the magnetic film, a feed interface is arranged on the flexible antenna, and the feed interface is connected with the SMA connector or the rear end circuit. According to the flexible antenna, the flexible antenna and the magnetic film are combined, and under the excitation of an external magnetic field, the magnetic film drives the flexible antenna to generate three-dimensional space deformation, so that the resonant frequency of the flexible antenna is shifted, and the electrical characteristics of the flexible antenna are reconstructed.
Description
Technical Field
The present disclosure relates to the field of flexible antenna technology, and more particularly, to a magnetic driven antenna based on a folded magnetic film.
Background
Reconfiguration of a circuit is a technique for changing the performance of the circuit by changing the structure of the circuit, such as the relative position of a geometric space, and the like, and generally includes analog circuits, digital circuits, radio frequency circuits, antennas, and the like.
However, the methods for driving the antenna to deform to change the electrical property are few, and most of the rigid antennas are difficult to bend and deform, so that the antenna cannot be matched with biological tissues. These problems limit the application of flexible antennas in the biomedical field, and other scenarios involving changes in antenna morphology.
Disclosure of Invention
Technical problem to be solved
The present disclosure provides a magnetic driven antenna based on a folded magnetic film to solve the above-mentioned technical problems.
(II) technical scheme
According to an aspect of the present disclosure, there is provided a folded magnetic film-based magnetically driven antenna, comprising:
the first insulating layer is positioned on the magnetic film with the customized magnetic field distribution;
a flexible antenna on the first insulating layer; the thickness of the flexible antenna is less than that of the magnetic thin film; the flexible antenna is provided with a feed interface, and the feed interface is connected with the SMA connector or the rear end circuit;
a second insulating layer on the flexible antenna;
under the excitation of an external magnetic field, the magnetic film drives the flexible antenna to generate three-dimensional space deformation, so that a directional diagram of the flexible antenna changes, the resonant frequency shifts, and the electrical characteristics of the flexible antenna are reconstructed.
In some embodiments of the present disclosure, the distance between the edges of the flexible antenna decreases and the resonant frequency of the flexible antenna increases.
In some embodiments of the present disclosure, the electrical characteristics of the flexible antenna include one or more of effective length, impedance and radiation characteristics, and gain.
In some embodiments of the present disclosure, the number of the flexible antennas is one or more, and a plurality of the flexible antennas are arranged in an array; the number of the magnetic thin films is one or more.
In some embodiments of the present disclosure, under the excitation of an external magnetic field, at least one of the magnetic films drives each of the flexible antennas to generate a three-dimensional spatial deformation.
In some embodiments of the present disclosure, the thickness of the flexible antenna is 3-5 microns, and the thickness of the magnetic thin film is 190-210 microns.
In some embodiments of the present disclosure, the material of the flexible antenna is a metal and/or a conductive polymer material; the metal is one or more of gold, silver and copper, the conductive polymer material is a composite conductive polymer, such as a mixed conductive material of silver nanowires and PDMS, and the structural conductive polymer is one or more of polyacetylene and polyaniline.
In some embodiments of the present disclosure, the magnetic thin film is expanded after being magnetized by at least one folding method to obtain a magnetic thin film with a customized magnetic field distribution.
In some embodiments of the present disclosure, the shape of the magnetic thin film is one or more of a stripe, a triangle, a circle, a serpentine, an octagon.
In some embodiments of the present disclosure, the magnetic film is a mixture of an elastic polymer and magnetic particles; the elastic polymer is one or more of polydimethylsiloxane, polyamide and Ecoflex, and the magnetic particles are one or more of neodymium iron boron, ferrite nano and micro particles.
(III) advantageous effects
From the technical scheme, the magnetic driving antenna based on the folded magnetic film has at least one or part of the following beneficial effects:
(1) according to the flexible antenna, the flexible antenna is arranged on the magnetic film, and under the excitation of an external magnetic field, the magnetic film deforms, so that the electrical characteristics of the flexible antenna are influenced, and the multi-element change of the performance and the using mode of the flexible antenna is realized.
(2) The thickness of flexible antenna is far less than the thickness of magnetic film in this disclosure, does benefit to flexible antenna and can take place stable deformation along with magnetic film.
(3) In the present disclosure, each flexible antenna can be independently controlled by one magnetic film, and the directional diagram of the antenna can be regulated in real time according to the deformation of the magnetic film, so that the form of the phased array antenna is realized.
(4) The present disclosure achieves miniaturization and flexibility of magnetically driven antennas, expanding its application in the biomedical field and other scenarios involving changes in antenna morphology.
(5) In the magnetic film disclosed by the disclosure, the magnetic field distribution is customized by utilizing different folding modes, and the effect of magnetic field enhancement is realized.
(6) The elastic polymer in the magnetic film of the present disclosure provides the necessary flexibility of the foldable magnetic film, and the magnetic particles in the magnetic film provide sufficient magnetic properties.
Drawings
Fig. 1 is a schematic diagram of a magnetic driven antenna based on a folded magnetic film according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a method for manufacturing a magnetic driving antenna based on a folded magnetic thin film according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of the preparation and magnetization of a strip-shaped thin film according to an embodiment of the disclosure.
Fig. 4 is a schematic diagram of the preparation and magnetization of a triangular thin film according to an embodiment of the disclosure.
Fig. 5 is a schematic view of preparation and magnetization of an annular thin film according to an embodiment of the disclosure.
Fig. 6 is a top view of a reconfigurable flexible dipole antenna based on a strip film according to an embodiment of the present disclosure.
Fig. 7 is a test result of a flexible antenna based on a strip film according to an embodiment of the present disclosure.
Fig. 8 is a top view of a reconfigurable flexible fractal antenna based on a triangular thin film according to an embodiment of the present disclosure.
Fig. 9 shows the test results of the flexible antenna based on the triangular thin film according to the embodiment of the present disclosure.
Fig. 10 is a top view of a reconfigurable flexible fractal antenna based on a loop film according to an embodiment of the present disclosure.
Fig. 11 is a test result of a flexible antenna based on a loop film according to an embodiment of the present disclosure.
[ description of main reference numerals in the drawings ] of the embodiments of the present disclosure
1-a magnetic thin film;
2-a first insulating layer;
3-a flexible antenna;
4-a second insulating layer;
5-feeding interface.
Detailed Description
In recent years, methods for preparing flexible permanent magnets are becoming mature, and magnetic thin films formed by uniformly mixing high-molecular elastic polymers and magnetic particles and then coating or spin-coating the mixture have good flexibility and magnetism. The magnetic thin film is fixed into a specific shape in different folding modes, after magnetization is carried out in a magnetic field in a single direction, combination of multiple magnetic poles can be realized, specific magnetic field distribution is formed, and the flexible permanent magnet has more excellent magnetic performance due to the increase of the number of boundaries among the magnetic poles. Emerging flexible electronic technologies offer the potential for miniaturization, flexibility, and reconfigurable features of flexible antennas. According to the flexible antenna, the flexible antenna and the magnetic film are combined, the external magnetic field provides enough magnetic force and magnetic torque, the magnetic film with different magnetic pole distributions is driven to deform, the spatial structure of the flexible antenna can be regulated and controlled in real time, for example, the strip-shaped magnetic film can generate wave deformation and closed ring formation, and the triangular magnetic film generates centrosymmetric deformation and is closed towards the center along with the enhancement of the external magnetic field. When the spatial structure of the flexible antenna changes, the effective length, impedance, radiation characteristics, gain and the like of the antenna change along with the change, so that the resonant frequency of the antenna shifts, a directional diagram changes, and the reconfigurable characteristic of the antenna can be realized.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Certain embodiments of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the disclosure are shown. Indeed, various embodiments of the disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In one exemplary embodiment of the present disclosure, a folded magnetic film based magnetically driven antenna is provided. Fig. 1 is a schematic diagram of a magnetic driven antenna based on a folded magnetic film according to an embodiment of the present disclosure. As shown in fig. 1, the magnetic driven antenna based on the folded magnetic thin film of the present disclosure includes, in order from bottom to top, a magnetic thin film 1, a first insulating layer 2, a flexible antenna 3, and a second insulating layer 4. Under the excitation of an external magnetic field, the magnetic film 1 drives the flexible antenna 3 to generate three-dimensional space deformation, and due to the change of the space structure of the flexible antenna 3, the electrical characteristics of the flexible antenna 3, including effective length, impedance, radiation characteristics and the like, are influenced, so that the resonance frequency of the flexible antenna 3 is shifted, and the reconstruction of the electrical characteristics of the flexible antenna 3 is realized. The thickness of the flexible antenna 3 is far smaller than that of the magnetic film 1, so that the flexible antenna 3 can stably deform along with the magnetic film 1. Specifically, the thickness of the flexible antenna is 3-5 microns, and the thickness of the magnetic film is 190-210 microns. The flexible antenna 3 is provided with a feed interface 5 for connecting the SMA connector or the back end circuit.
The flexible antenna can be fabricated by, but not limited to, photolithography, screen printing, ink-jet printing or laser engraving, and any circuit fabrication process available to those skilled in the art can be used, which is not illustrated here.
In an embodiment of the present disclosure, the flexible antenna 3 is a single antenna, such as a monopole antenna, a dipole antenna, an inverted F antenna, a microstrip patch antenna, and the like, and the magnetic film drives the flexible antenna to perform shape adjustment, so as to dynamically adjust the electrical characteristics of the flexible antenna.
In an embodiment of the present disclosure, the flexible antenna 3 may also be an antenna array with various complex structures, the size theory of the antenna array may reach millimeter or micrometer, each antenna in the antenna array may be independently controlled by one magnetic film 1 to implement a form of a phased array antenna, and a directional pattern of each antenna in the antenna array may be adjusted and controlled in real time according to the deformation of the magnetic film 1.
The material of the flexible antenna 3 is, for example, metal or a conductive polymer material. The metal is one or more of gold, silver and copper, the conductive polymer material is a composite conductive polymer, such as a mixed conductive material of silver nanowires and PDMS, and the structural conductive polymer is one or more of polyacetylene and polyaniline.
With respect to the magnetic film 1 being a mixture of an elastic polymer and magnetic particles, the elastic polymer provides the necessary flexibility for the film to be foldable, and the magnetic particles provide sufficient magnetism for the magnetic film 1. Wherein, the elastic polymer is one or more of polydimethylsiloxane, polyamide and Ecoflex, and the magnetic particles are one or more of neodymium iron boron, ferrite nano and micron particles.
Of these, Ecoflex is a platinum catalyzed silicone manufactured by Smooth-On corporation, a simple and versatile silica gel material. Ecoflex is a very soft polymeric material with a young's modulus of 125kPa, similar to the softness of human skin. Ecoflex is a polymer that is stable relative to the surrounding environment, has good water resistance, and is suitable for long-term sensing applications.
In one embodiment of the present disclosure, the material of the first insulating layer 2 is polyimide, the material of the second insulating layer 4 is polydimethylsiloxane, and the material of the flexible antenna 3 is copper.
In an exemplary embodiment of the present disclosure, a method for manufacturing a magnetic driving antenna based on a folded magnetic thin film is also provided. Fig. 2 is a flow chart of a manufacturing process of the reconfigurable flexible antenna in the embodiment of the present disclosure. The preparation method of the magnetic drive antenna based on the folding magnetic film comprises the following steps:
and 5, spin-coating or coating a polydimethylsiloxane protective layer on the surface of the flexible antenna to obtain a second insulating layer so as to ensure that the antenna cannot fall off from the film in the deformation process.
The following specific examples are provided with respect to the method for preparing the magnetic thin film, in which the material of the elastic polymer is polydimethylsiloxane, and the material of the magnetic particles is neodymium iron boron. Uniformly mixing neodymium iron boron magnetic particles and polydimethylsiloxane according to a specific proportion, vacuumizing, standing, removing bubbles in the mixture, uniformly coating a PET film by using a coating device, curing for 30 minutes at 90 ℃ in a constant-temperature oven, peeling the magnetic film from the PET to obtain a magnetic film with the thickness of 200 microns, and cutting or cutting the magnetic film into at least one of the following shapes, wherein the shapes of the magnetic films are provided schematically below.
The first magnetic film 1 is a strip-shaped film with a length of 30mm and a width of 5mm, is folded in the same direction as indicated by a thin arrow in fig. 3, and is placed in a magnetizing device to be magnetized in a single direction along the direction of a thick arrow.
The second magnetic film 1 is in the shape of an equilateral triangle with a side length of 30mm, and is placed in a magnetizing device to be magnetized in a single direction along the direction of a thick arrow after being respectively folded towards the center along an angular bisector in a mode shown by a thin arrow in fig. 4.
The third magnetic film 1 is shaped as a circular ring with an outer diameter of 25mm and an inner diameter of 12mm, is symmetrically folded in a manner shown by a thin arrow in fig. 5, is placed in a magnetizing device to be magnetized in a single direction along the direction of a thick arrow, and is unfolded to obtain the annular magnetic film.
The elastic polymer provides the necessary flexibility for folding the magnetic film 1, the magnetic particles provide enough magnetism for the magnetic film 1, different folding modes can customize the magnetic field distribution of the film, and the folding modes are not limited to the provided folding modes, and finally the folding mode capable of realizing the magnetic field enhancement effect can be suitable.
Fig. 6 is a top view of a reconfigurable flexible dipole antenna based on a strip film according to an embodiment of the present disclosure. As shown in fig. 6, a thin layer of polydimethylsiloxane is uniformly coated on the strip-shaped magnetic film, the strip-shaped magnetic film is heated for 15 minutes at 90 ℃, the flexible antenna is placed on the strip-shaped magnetic film and fixed to a specified position, and then the strip-shaped magnetic film is placed in an oven or a hot plate and heated for 30 minutes at 90 ℃, so that the flexible antenna and the strip-shaped magnetic film are completely adhered. Fig. 7 is a test result of a flexible antenna based on a strip film according to an embodiment of the present disclosure. As shown in fig. 7, in the original state, the resonant frequency of the folded dipole antenna is 2.05GHz, and the corresponding return loss value is-24.4 dB; when the wave shape is changed (mode 1), the resonance frequency is increased to 2.2GHz, and the return loss value is changed to-8.47 dB; when closed in a ring shape (mode 2), the resonance frequency disappears almost completely, and an electromagnetic shielding-like effect is obtained, whereby it can be seen that, for the antenna of the strip film, the closer the both ends are, the higher the resonance frequency is. The flexible antenna based on the strip-shaped film has different resonant frequencies in different deformation modes, and meets the requirement of antenna performance reconstruction.
As described below, if the dipole antenna is initially circular, the pattern changes to an elliptical shape, an 8-shaped shape, or the like, and the bandwidth and directivity change accordingly, when the magnetic thin film is deformed.
Fig. 8 is a top view of a reconfigurable flexible fractal antenna based on a triangular thin film according to an embodiment of the present disclosure. As shown in fig. 8, the flexible fractal antenna based on the triangular thin film is obtained by a similar preparation method to the strip-shaped magnetic thin film. Fig. 9 shows the test results of the flexible antenna based on the triangular thin film according to the embodiment of the present disclosure. As shown in fig. 9, the fractal dipole antenna has a plurality of receiving frequencies, wherein the frequency with the best electromagnetic wave receiving performance is 3.53GHZ, and the corresponding return loss value is-18.7 dB; when the strain is in the mode 1, the frequency is shifted, the frequency at which the electromagnetic wave receiving capability is best becomes 4.78GHZ, and the return loss becomes-16.6 dB. When deformed into mode 2, i.e. closed into a triangular "wrap", the frequency shifts to 4.58GHz, whereby it can be seen that the closer the three edges of the flexible antenna at the triangular membrane are, the higher the resonant frequency. Under the control of an external magnetic field, the flexible antenna based on the triangular film has different deformation modes corresponding to different resonant frequencies, and the requirement of antenna performance reconstruction is met.
Fig. 10 is a top view of a reconfigurable flexible fractal antenna based on a loop film according to an embodiment of the present disclosure. As shown in fig. 10, the flexible fractal antenna based on the annular thin film is obtained by a similar preparation method to the strip-shaped magnetic thin film. Fig. 11 is a test result of a flexible antenna based on a loop film according to an embodiment of the present disclosure. As shown in fig. 11, in the original state, the resonant frequency is 2.45GHz, and the corresponding return loss value is-25.0 dB; when the deformation is upward bending in mode 1 (mode 1), the resonance frequency becomes 2.67GHz, and the return loss is-32.9 dB; when deformed downward (mode 2), the resonant frequency becomes 2.63GHz and the return loss is-23.9 dB, and the two deformation modes are almost the same, resulting in similar frequency shifts. The flexible antenna based on the annular film has different resonant frequencies in different deformation modes, and meets the requirement of antenna performance reconstruction.
So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
From the above description, those skilled in the art should clearly recognize that the present disclosure is based on a folded magnetic thin film magnetically driven antenna.
In summary, the present disclosure provides a magnetic driven antenna based on a folded magnetic film, in which a flexible antenna is combined with a magnetic film, under the excitation of an external magnetic field, the magnetic film drives the flexible antenna to generate a three-dimensional spatial deformation, so that a resonant frequency of the flexible antenna is shifted, and the reconstruction of the electrical characteristics of the flexible antenna is realized.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name.
In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (11)
1. A folded magnetic film based magnetically driven antenna comprising:
the first insulating layer is positioned on the magnetic film with the customized magnetic field distribution; the magnetic film is magnetized in at least one folding mode and then unfolded to obtain the magnetic film with the self-defined magnetic field distribution;
a flexible antenna on the first insulating layer; the thickness of the flexible antenna is less than that of the magnetic thin film; the flexible antenna is provided with a feed interface, and the feed interface is connected with the SMA connector or the rear end circuit;
a second insulating layer on the flexible antenna;
under the excitation of an external magnetic field, the magnetic film drives the flexible antenna to generate three-dimensional space deformation, so that a directional diagram of the flexible antenna changes, the resonant frequency shifts, and the electrical characteristics of the flexible antenna are reconstructed.
2. The folded magnetic film-based magnetically driven antenna of claim 1, wherein the distance between the edges of the flexible antenna decreases and the resonant frequency of the flexible antenna increases.
3. The folded magnetic film-based magnetically driven antenna of claim 1, wherein the electrical properties of the flexible antenna comprise one or more of effective length, impedance and radiation characteristics, and gain.
4. The magnetically driven antenna based on a folded magnetic film of claim 1, wherein the number of the flexible antennas is one or more, and a plurality of the flexible antennas are arranged in an array; the number of the magnetic thin films is one or more.
5. The folded magnetic film-based magnetically actuated antenna of claim 4, wherein at least one of the magnetic films imparts a three-dimensional spatial deformation to each of the flexible antennas upon excitation by an external magnetic field.
6. The magnetically driven antenna based on folded magnetic film of claim 1, wherein the flexible antenna has a thickness of 3-5 microns and the magnetic film has a thickness of 190-210 microns.
7. The folded magnetic film-based magnetically driven antenna of claim 1, wherein the material of the flexible antenna is a metal and/or a conductive polymer material; the metal is one or more of gold, silver and copper, and the conductive polymer material is a composite conductive polymer or a structural conductive polymer.
8. The folded magnetic film-based magnetically driven antenna of claim 7, wherein the composite conductive high polymer is a mixed conductive material of silver nanowires and PDMS.
9. The magnetically driven antenna based on the folded magnetic film of claim 7, wherein the structural conductive polymer is one or more of polyacetylene and polyaniline.
10. The folded magnetic film based magnetically driven antenna of any one of claims 1 to 7, wherein the magnetic film has a shape of one or more of a strip, a triangle, a circle, a serpentine, an octagon.
11. The folded magnetic film-based magnetically driven antenna of any one of claims 1 to 7, wherein the magnetic film is a mixture of an elastic polymer and magnetic particles; the elastic polymer is one or more of polydimethylsiloxane, polyamide and Ecoflex, and the magnetic particles are one or more of neodymium iron boron, ferrite nano and micro particles.
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