CN113193666A - Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission - Google Patents
Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission Download PDFInfo
- Publication number
- CN113193666A CN113193666A CN202110556325.8A CN202110556325A CN113193666A CN 113193666 A CN113193666 A CN 113193666A CN 202110556325 A CN202110556325 A CN 202110556325A CN 113193666 A CN113193666 A CN 113193666A
- Authority
- CN
- China
- Prior art keywords
- frequency
- compensation
- metamaterial plate
- resonance
- metamaterial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000035699 permeability Effects 0.000 title claims abstract description 77
- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 58
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
Abstract
The invention relates to a novel double-frequency negative magnetic permeability metamaterial plate applied to wireless power transmission, which comprises a dielectric substrate, and resonant coils and a compensation network which are arranged on two sides of the dielectric substrate; the front resonant coil is connected with the back compensation network through a via hole; the negative compensation network comprises a compensation inductor L2, a second compensation capacitor C2 and a first compensation capacitor C1; the compensation inductor L2 and the second compensation capacitor C2 are connected in parallel and then connected in series with the first compensation capacitor C1. The invention has the advantages of simple structure, thin thickness, simple and convenient manufacture and low cost, and has two negative magnetic conductivity frequency bands.
Description
Technical Field
The invention relates to the field of wireless power transmission, in particular to a novel double-frequency negative permeability metamaterial plate applied to wireless power transmission.
Background
The metamaterial is an artificial composite material, which is a general name of negative refractive index materials, left-handed materials, non-positive definite media and the like, and the artificial material has electromagnetic properties which are not possessed by conventional materials in nature, such as negative dielectric constant or negative magnetic permeability which can be realized in a specific frequency range, so the metamaterial becomes a research hotspot in the field of electromagnetic physics once being provided.
Radio power transfer technology refers to a power transfer mode in which power is transferred from a source terminal to a load terminal without a wire. In recent years, with the development of magnetic resonance type wireless power transmission technology, how to improve the distance and efficiency of wireless power transmission becomes a current research hotspot. The efficiency of the wireless power transmission system is related to the coupling degree of the coils, the coupling coefficient is closely related to the distance between the coils, and the magnetic field generated by the source coil exponentially decays along with the increase of the distance, so that the coupling coefficient is deteriorated at a long distance, and the industrial application of the wireless power transmission technology is seriously hindered. Aiming at the problem, loading the metamaterial plate in the wireless power transmission system is a good solution, the metamaterial can regulate and control the distribution of magnetic fields, reduce spatial electromagnetic radiation and enable more energy at a source end to be gathered at a load end, so that the coupling of a resonance coil is enhanced, and the transmission efficiency and distance of wireless power transmission are greatly improved.
The traditional negative magnetic conductivity metamaterial is large in thickness and size, only has a single working frequency point, and the metamaterial parameters cannot be adjusted after the metamaterial is manufactured. With the development of technologies such as smart home, simultaneous transmission of wireless energy and information, resonant wireless power transmission systems are developing in a multi-frequency direction, and the traditional metamaterial cannot meet the requirements, so that the application of the metamaterial in the wireless power transmission systems is greatly limited. Therefore, in a diversified electronic system with high integration level, a dual-frequency or multi-frequency negative permeability metamaterial is urgently needed.
Disclosure of Invention
In view of this, the present invention provides a novel dual-band negative-permeability metamaterial plate for wireless power transmission, which can change a low-frequency negative-permeability frequency band and a high-frequency negative-permeability frequency band by changing the size of a compensation capacitor or a compensation inductor.
The invention is realized by adopting the following scheme: a novel double-frequency negative magnetic conductivity metamaterial plate applied to wireless power transmission comprises a dielectric substrate, and resonant coils and a compensation network which are arranged on two sides of the dielectric substrate; the front resonant coil is connected with the back compensation network through a via hole; the negative compensation network comprises a compensation inductor L2, a second compensation capacitor C2 and a first compensation capacitor C1; the compensation inductor L2 and the second compensation capacitor C2 are connected in parallel and then connected in series with the first compensation capacitor C1.
Furthermore, the number of turns of the resonance coil is 4-20 turns.
Further, the resonance coil can adopt a square spiral coil structure or a circular spiral coil structure.
Furthermore, the thickness of the metal wire of the resonance coil is 0.01 mm-0.05 mm, the width of the metal wire is 0.5 mm-2 mm, and the distance between the metal wire and the metal wire is 1 mm-2 mm.
Furthermore, the dielectric substrate is an epoxy resin substrate, and the thickness of the dielectric substrate is 0.8 mm-3 mm.
Further, the first compensation capacitor C1 and the second compensation capacitor C2 are both high-frequency patch capacitors, and the compensation inductor L2 is a patch power inductor.
Further, during operation, a single double-frequency negative-permeability metamaterial plate or a plurality of double-frequency negative-permeability metamaterial plates are arranged in an array mode according to the size of the resonant coil, the side length of the double-frequency negative-permeability metamaterial plate array is larger than the diameter of the resonant coil, when electromagnetic waves are incident on the double-frequency negative-permeability metamaterial plate array structure, a compensation inductor L2 on each double-frequency negative-permeability metamaterial plate and two compensation capacitors C1 and C2 form a double resonance loop, reflection and transmission of the electromagnetic waves are changed, and from the whole periodic array, the whole magnetic permeability of the double-frequency negative-permeability metamaterial plate array structure can generate a negative magnetic permeability part behind a resonance point, so that a magnetic focusing effect is generated, distribution of a spatial electromagnetic field is improved, and the transmission efficiency of the wireless power transmission system is improved; when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is inductive, the whole circuit can obtain low resonance frequency corresponding to a low-frequency negative magnetic permeability frequency band of the metamaterial plate, and when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is capacitive, the whole circuit can obtain high resonance frequency corresponding to a high-frequency negative magnetic permeability frequency band of the metamaterial plate; by changing the size of the compensation inductor L1, or the size of the compensation capacitor C1 or C2, or the number of turns of the resonance coil, the low-frequency and high-frequency working frequency bands of the metamaterial can be changed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has double negative magnetic conductivity frequency bands, is suitable for various wireless electric energy transmission devices, and can be applied to simultaneous transmission of energy and information.
2. The metamaterial provided by the invention is introduced with the compensation inductor and the two compensation capacitors, and the low-frequency negative magnetic permeability frequency band and the high-frequency negative magnetic permeability frequency band can be changed by changing the size of the compensation capacitor or the compensation inductor, so that the tuning of the metamaterial is realized.
3. The invention has simple structure, thin thickness, low cost and simple and convenient manufacture.
4. The invention has low loss.
5. The invention adopts the PCB printing technology for processing, is beneficial to the rapid production of the metamaterial, and has simple process and low cost.
6. Compared with the prior art, the dual-frequency magnetic negative characteristic is realized by adopting a nested structure in the prior art, the dual-frequency characteristic is realized by adopting an additional compensation structure, two pairs of metal spiral resonance coils are needed in the prior art, only one metal spiral resonance coil is needed in the invention, the consumption of nonferrous metals can be reduced, and the dual-frequency magnetic negative characteristic is more environment-friendly. Secondly, the prior art belongs to a dual-frequency metamaterial with a self-resonant structure, the dual-frequency metamaterial with the self-resonant structure utilizes the parasitic capacitance of a coil to perform resonance compensation, the metamaterial is generally processed and manufactured by a PCB (printed circuit board) etching process, the parameters of the metamaterial cannot be adjusted after the metamaterial is manufactured, and in practical application, due to factors such as simulation or processing errors, the situation of simulation and physical frequency deviation may exist. The invention well solves the problem, can enable the metamaterial plate to be better applied in practice, adopts an external compensation mode to construct the dual-frequency metamaterial, and can change the resonance frequency point of the metamaterial, namely change the negative permeability frequency band, only by adjusting the size of an external compensation inductor or capacitor during physical debugging.
Drawings
Fig. 1 is a front view of a novel dual-frequency negative permeability metamaterial plate according to an embodiment of the present invention, where 10 is a resonant coil, and 20 is a dielectric substrate.
FIG. 2 is a diagram of a compensation network of the novel dual-frequency negative permeability metamaterial plate according to the embodiment of the invention.
Fig. 3 is a detailed diagram of the vicinity of a via hole of a novel dual-frequency negative permeability metamaterial plate according to an embodiment of the present invention, where 30 is a front via hole of the resonant coil 10, and 40 is a rear via hole of the resonant coil 10.
FIG. 4 is an equivalent circuit diagram of the novel dual-frequency negative permeability metamaterial plate according to the embodiment of the invention.
FIG. 5 is a real part permeability curve and an imaginary part permeability curve of the novel dual-frequency negative permeability metamaterial plate according to the embodiment of the invention.
FIG. 6 is a S-parameter curve diagram of the novel dual-frequency negative permeability metamaterial plate according to the embodiment of the invention.
FIG. 7 is a front view of a novel array of dual-frequency negative permeability metamaterial plates in accordance with embodiments of the present invention.
FIG. 8 is a graph of the real part of the permeability of the novel dual-frequency negative permeability metamaterial plate C1 according to the embodiment of the invention.
FIG. 9 is a graph of the real part of the permeability of the novel dual-frequency negative permeability metamaterial plate C2 according to the embodiment of the invention.
FIG. 10 is a graph of the real part of the permeability of the novel dual-frequency negative permeability metamaterial slab transition L1 according to the embodiment of the invention.
FIG. 11 is a graph of the real part of the permeability of the turns of the novel dual-frequency negative permeability metamaterial plate variable resonance coil according to the embodiment of the invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment provides a novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission, which comprises a dielectric substrate 20, and a resonant coil 10 and a compensation network which are arranged on two sides of the dielectric substrate 20; the front resonant coil 10 is connected with the back compensation network through a via hole; the negative compensation network comprises a compensation inductor L2, a second compensation capacitor C2 and a first compensation capacitor C1; the compensation inductor L2 and the second compensation capacitor C2 are connected in parallel and then connected in series with the first compensation capacitor C1.
In this embodiment, the number of turns of the resonant coil 10 is 4 to 20.
In the present embodiment, the resonance coil 10 can adopt a square spiral coil structure or a circular spiral coil structure.
In this embodiment, the thickness of the metal wire of the resonance coil 10 is 0.01mm to 0.05mm, the width is 0.5mm to 2mm, and the distance between the metal wire and the metal wire is 1mm to 2 mm.
In this embodiment, the dielectric substrate is an epoxy resin substrate, and the thickness of the dielectric substrate is 0.8mm to 3 mm.
In this embodiment, the first compensation capacitor C1 and the second compensation capacitor C2 are both high-frequency patch capacitors, and the compensation inductor L2 is a patch power inductor.
In the embodiment, in operation, a single dual-frequency negative permeability metamaterial plate or a plurality of dual-frequency negative permeability metamaterial plates are arranged in an array form according to the size of the resonant coil 10, as shown in fig. 7, the side length of the dual-frequency negative permeability metamaterial plate array is larger than the diameter of the resonant coil 10, when electromagnetic waves are incident on the double-frequency negative magnetic permeability metamaterial plate array structure, the compensation inductor L2 on each double-frequency negative magnetic permeability metamaterial plate and the two compensation capacitors C1 and C2 form a double-resonance loop, so that the reflection and transmission of the electromagnetic waves are changed, the whole magnetic permeability of the double-frequency negative magnetic permeability metamaterial plate array structure can generate a negative magnetic permeability part after a resonance point, thereby generating a magnetic focusing effect, improving the distribution of a spatial electromagnetic field and improving the transmission efficiency of the wireless power transmission system; when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is inductive, the whole circuit can obtain low resonance frequency corresponding to a low-frequency negative magnetic permeability frequency band of the metamaterial plate, and when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is capacitive, the whole circuit can obtain high resonance frequency corresponding to a high-frequency negative magnetic permeability frequency band of the metamaterial plate; by changing the size of the compensation inductor L1, or the size of the compensation capacitor C1 or C2, or the number of turns of the resonance coil, the low-frequency and high-frequency working frequency bands of the metamaterial can be changed.
Preferably, in the embodiment, the compensation inductor L1 ranges from 0.5uH to 2uH, the compensation capacitor C1 ranges from 20pf to 200pf, and the compensation capacitor C2 ranges from 200pf to 1000 pf.
Preferably, the present embodiment belongs to a dual-frequency metamaterial with an additional compensation structure, and the magnetic conductivity in the specified frequency band is a negative value by utilizing the resonance of the equivalent inductance of the resonance coil and the compensation inductance capacitance.
The prior art belongs to a dual-frequency metamaterial with a self-resonant structure, the dual-frequency metamaterial with the self-resonant structure utilizes a coil self-parasitic capacitance to perform resonance compensation, the metamaterial is generally processed and manufactured by a PCB (printed circuit board) etching process, parameters of the metamaterial cannot be adjusted after the metamaterial is manufactured, and in practical application, due to factors such as simulation or processing errors, the situation of simulation and physical frequency deviation may exist. The problem is well solved to this embodiment, can make better in the actual application of metamaterial board, adopts the mode of plus compensation to construct the dual-frenquency metamaterial, when the object is debugged, only needs to adjust the size of plus compensation inductance or electric capacity and can change the resonance frequency point of metamaterial, changes the negative permeability frequency channel promptly. Secondly adopt two pairs of metal spiral resonance coils among the prior art, this embodiment only needs a metal spiral resonance coil, reducible non ferrous metal's consumption, environmental protection more.
Preferably, in the present embodiment, as shown in fig. 1 to 6, the novel dual-frequency negative permeability metamaterial plate includes a dielectric substrate, and a resonant coil 10 and a compensation network are respectively disposed on two sides of the dielectric substrate; the front resonant coil 10 is connected with the back compensation network through via holes 30 and 40; the negative compensation network is formed by connecting a compensation inductor L2 and a second compensation capacitor C2 in parallel and then connecting the compensation inductor L2 and the second compensation capacitor C2 in series with a first compensation capacitor C1. When the metamaterial plate works, two negative magnetic conductivity frequency bands appear on the metamaterial plate, the low frequency band is 5.29 MHz-5.83 MHz, the center frequency is 5.31MHz, the high frequency band is 7.68 MHz-8.33 MHz, and the center frequency is 7.69 MHz.
Preferably, in this embodiment, as shown in fig. 4, an equivalent circuit diagram of the dual-frequency negative permeability metamaterial plate of the present embodiment is shown, where L1 is an equivalent inductance of the resonant coil 10, C1 and C2 are compensation capacitors, and L2 is a compensation inductance, and losses of the circuit are ignored for simplicity of analysis. When the parallel resonance circuit formed by the L2 and the C2 is inductive, the whole circuit can obtain low resonance frequency corresponding to a frequency band with low frequency negative permeability of the metamaterial plate, and when the parallel resonance circuit formed by the L2 and the C2 is capacitive, the whole circuit can obtain high resonance frequency corresponding to a frequency band with high frequency negative permeability of the metamaterial plate. By changing the size of the compensation inductor L1, or the size of the compensation capacitor C1 or C2, or the number of turns of the resonant coil 10, the low-frequency and high-frequency operating frequency bands of the metamaterial can be adjusted, namely, the metamaterial tuning technology is realized.
Preferably, in this embodiment, as shown in fig. 7 and 8, the number of turns of the fixed resonance coil of the dual-frequency negative permeability metamaterial plate of this embodiment is 15, the compensation inductor L1 is 1uH, the compensation capacitor C2 is 517pf, and a graph of the real part of permeability measured by changing the size of the compensation capacitor C1, as can be seen from the graph, as the compensation capacitor C1 increases, the frequency points of low-frequency and high-frequency resonance gradually decrease, and the resonance strength weakens.
Preferably, in this embodiment, as shown in fig. 9, the number of turns of the fixed resonance coil of the dual-frequency negative permeability metamaterial plate of this embodiment is 15, the compensation inductor L1 is 1uH, the compensation capacitor C1 is 63pf, and a graph of the real part of permeability measured by changing the size of the compensation capacitor C2, as can be seen from the graph, as the compensation capacitor C2 increases, the frequency points of low-frequency and high-frequency resonance gradually decrease, and the resonance strength weakens.
Preferably, in this embodiment, as shown in fig. 10, the number of turns of the fixed resonance coil of the dual-frequency negative permeability metamaterial plate of this embodiment is 15, the compensation capacitor C1 is 63pf, the compensation capacitor C2 is 517pf, and a graph of a real part of permeability measured by changing the size of the compensation inductor L1, as can be seen from the graph, as the compensation inductor L1 increases, the frequency points of low-frequency and high-frequency resonance gradually decrease, and the resonance intensity of the low-frequency band decreases.
Preferably, in this embodiment, as shown in fig. 11, a fixed compensation capacitor C1 is 63pf, a compensation capacitor C2 is 517pf, and a compensation inductor L1 is 1uH for the novel dual-frequency negative permeability metamaterial plate of this embodiment, a graph of a real part of permeability measured by changing the number of turns of the resonant coil is shown, as the number of turns of the resonant coil increases, the frequency points of low-frequency and high-frequency resonance gradually decrease, and the resonant strength of the low-frequency band decreases.
Preferably, in this embodiment, as shown in fig. 5, for the real part and imaginary part curves of the equivalent permeability of the novel dual-frequency negative permeability metamaterial plate of this embodiment, it can be seen that a negative value appears in the permeability after two resonance points, and when a magnetic field passes through the metamaterial, a magnetic field focusing effect occurs, so that distribution of the magnetic field is regulated and controlled, energy at a source end is gathered at a load end more, coupling between the resonant coils 10 is enhanced, and the purpose of improving transmission efficiency of the system is achieved. From the figure we can see that the imaginary part of the permeability drops to close to 0 very soon after the resonance point, that is to say in the following frequency band the loss drops to close to 0, and the loss is negligible. The structure of the novel dual-frequency negative-permeability metamaterial plate has the advantage of extremely low loss in practical application.
Preferably, in this embodiment, as shown in fig. 6, which is an S-parameter curve of the novel dual-frequency negative permeability metamaterial plate of this embodiment, it can be seen through a graph that the metamaterial plate of this embodiment resonates at both 5.31MHz and 7.69 MHz.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (7)
1. The utility model provides a be applied to wireless power transmission's novel dual-frenquency negative permeability metamaterial board which characterized in that: the device comprises a dielectric substrate, and a resonance coil and a compensation network which are arranged on two sides of the dielectric substrate; the front resonant coil is connected with the back compensation network through a via hole; the negative compensation network comprises a compensation inductor L2, a second compensation capacitor C2 and a first compensation capacitor C1; the compensation inductor L2 and the second compensation capacitor C2 are connected in parallel and then connected in series with the first compensation capacitor C1.
2. The novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission as claimed in claim 1, wherein: the number of turns of the resonance coil is 4-20 turns.
3. The novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission as claimed in claim 1, wherein: the resonance coil can adopt a square spiral coil structure or a circular spiral coil structure.
4. The novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission as claimed in claim 1, wherein: the thickness of the metal wire of the resonance coil is 0.01 mm-0.05 mm, the width of the metal wire is 0.5 mm-2 mm, and the distance between the metal wire and the metal wire is 1 mm-2 mm.
5. The novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission as claimed in claim 1, wherein: the dielectric substrate is an epoxy resin substrate, and the thickness of the dielectric substrate is 0.8 mm-3 mm.
6. The novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission as claimed in claim 1, wherein: the first compensation capacitor C1 and the second compensation capacitor C2 are both high-frequency patch capacitors, and the compensation inductor L2 is a patch power inductor.
7. The working method of the novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission in claim 1 is characterized in that: when the double-frequency negative magnetic permeability metamaterial plate array structure works, a single double-frequency negative magnetic permeability metamaterial plate or a plurality of double-frequency negative magnetic permeability metamaterial plates are arranged in the form of an array according to the size of a resonant coil, the side length of the double-frequency negative magnetic permeability metamaterial plate array is larger than the diameter of the resonant coil, when electromagnetic waves are incident on the double-frequency negative magnetic permeability metamaterial plate array structure, a compensation inductor L2 on each double-frequency negative magnetic permeability metamaterial plate and two compensation capacitors C1 and C2 form a double resonance loop, so that the reflection and transmission of the electromagnetic waves are changed, and from the whole periodic array, the whole magnetic permeability of the double-frequency negative magnetic permeability metamaterial plate array structure can generate a negative magnetic permeability part behind a resonance point, so that a magnetic focusing effect is generated, the distribution of a spatial electromagnetic field is improved, and the transmission efficiency of a wireless electric energy transmission system is improved; when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is inductive, the whole circuit can obtain low resonance frequency corresponding to a low-frequency negative magnetic permeability frequency band of the metamaterial plate, and when the parallel resonance circuit formed by the compensation inductor L2 and the compensation capacitor C2 is capacitive, the whole circuit can obtain high resonance frequency corresponding to a high-frequency negative magnetic permeability frequency band of the metamaterial plate; by changing the size of the compensation inductor L1, or the size of the compensation capacitor C1 or C2, or the number of turns of the resonance coil, the low-frequency and high-frequency working frequency bands of the metamaterial can be changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556325.8A CN113193666A (en) | 2021-05-21 | 2021-05-21 | Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556325.8A CN113193666A (en) | 2021-05-21 | 2021-05-21 | Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113193666A true CN113193666A (en) | 2021-07-30 |
Family
ID=76984706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110556325.8A Pending CN113193666A (en) | 2021-05-21 | 2021-05-21 | Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113193666A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141491A (en) * | 2022-01-11 | 2022-03-04 | 中国矿业大学(北京) | kHz frequency band metamaterial energy storage inductor |
| CN117375265A (en) * | 2023-12-07 | 2024-01-09 | 清华大学深圳国际研究生院 | Self-resonant relay coil, wireless power transmission system and wireless charging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3208261U (en) * | 2015-10-23 | 2016-12-28 | アップル インコーポレイテッド | Wireless charging and communication system using dual frequency patch antenna |
| CN106532976A (en) * | 2016-11-16 | 2017-03-22 | 华中科技大学 | Wireless electric energy transmission device based on 13.56MHz metamaterial |
| CN110635578A (en) * | 2019-09-25 | 2019-12-31 | 福州大学 | Double-frequency negative permeability metamaterial plate applied to wireless power transmission |
| CN110855020A (en) * | 2019-11-11 | 2020-02-28 | 暨南大学 | Constant-voltage wireless charging system based on LCCL-LC compensation and parameter design method |
| CN112564308A (en) * | 2020-11-30 | 2021-03-26 | 哈尔滨工业大学 | Double-frequency compensation and power decoupling control system for double-load WPT system |
-
2021
- 2021-05-21 CN CN202110556325.8A patent/CN113193666A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3208261U (en) * | 2015-10-23 | 2016-12-28 | アップル インコーポレイテッド | Wireless charging and communication system using dual frequency patch antenna |
| CN106532976A (en) * | 2016-11-16 | 2017-03-22 | 华中科技大学 | Wireless electric energy transmission device based on 13.56MHz metamaterial |
| CN110635578A (en) * | 2019-09-25 | 2019-12-31 | 福州大学 | Double-frequency negative permeability metamaterial plate applied to wireless power transmission |
| CN110855020A (en) * | 2019-11-11 | 2020-02-28 | 暨南大学 | Constant-voltage wireless charging system based on LCCL-LC compensation and parameter design method |
| CN112564308A (en) * | 2020-11-30 | 2021-03-26 | 哈尔滨工业大学 | Double-frequency compensation and power decoupling control system for double-load WPT system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141491A (en) * | 2022-01-11 | 2022-03-04 | 中国矿业大学(北京) | kHz frequency band metamaterial energy storage inductor |
| CN117375265A (en) * | 2023-12-07 | 2024-01-09 | 清华大学深圳国际研究生院 | Self-resonant relay coil, wireless power transmission system and wireless charging system |
| CN117375265B (en) * | 2023-12-07 | 2024-03-26 | 清华大学深圳国际研究生院 | Self-resonant relay coil, wireless power transmission system and wireless charging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113193666A (en) | Novel dual-frequency negative permeability metamaterial plate applied to wireless power transmission | |
| CN101904048A (en) | Antennas for wireless power applications | |
| CN106450784A (en) | Metamaterial with low-frequency negative magnetic permeability | |
| CN201868575U (en) | Bluetooth antenna | |
| Alibakhshi | Introducing the new wideband small plate antennas with engraved voids to form new geometries based on CRLH MTM-TLs for wireless applications | |
| CN110854536B (en) | Tunable double-frequency negative permeability metamaterial with loaded capacitor | |
| CN212725583U (en) | Miniaturized millimeter wave microstrip antenna | |
| CN109786974B (en) | Broadband negative-permeability metamaterial plate for wireless power transmission and working method thereof | |
| Zhou et al. | Compact broadband planar resonator with a viaed double spiral for robust wireless power transfer | |
| Jolani et al. | A novel planar wireless power transfer system with strong coupled magnetic resonances | |
| CN103296781A (en) | Wireless energy transmitting system | |
| CN214754150U (en) | Small-size RFID anti-metal label antenna based on artificial transmission line structure | |
| CN113285206B (en) | Miniaturized omnidirectional UHF-RFID (ultra high frequency-radio frequency identification) tag antenna and preparation method thereof | |
| CN203644940U (en) | Annular UHF near field RFID reader-writer antenna | |
| CN110635578A (en) | Double-frequency negative permeability metamaterial plate applied to wireless power transmission | |
| El Ahmar et al. | A new passive UHF RFID tag using square split ring resonator | |
| CN103296773A (en) | Wireless energy transmission system | |
| CN103296772A (en) | Wireless energy transmission system | |
| JP2012085234A (en) | Transmission system and transmission device | |
| Chen et al. | Analysis and design of mobile device antenna–speaker integration for optimum over-the-air performance | |
| Yan et al. | Design and Implementation of Long-Distance Dual PIFA Antenna Structure of Small Embedded Metal UHF RFID Tag. | |
| Lee et al. | Shielding effect of mu-near-zero metamaterial slab to reduce magnetic flux leakage in wireless power transfer system | |
| Zhang et al. | Megahertz magneto-inductive waveguide for electromagnetic energy transmission in radio-frequency identification system | |
| CN103022658B (en) | High-gain metamaterial antenna | |
| CN219760982U (en) | Radio frequency broadband matching circuit based on capacitive load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210730 |
|
| RJ01 | Rejection of invention patent application after publication |