CN221042407U - Dual-band wireless energy collection device - Google Patents
Dual-band wireless energy collection device Download PDFInfo
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- CN221042407U CN221042407U CN202420812980.4U CN202420812980U CN221042407U CN 221042407 U CN221042407 U CN 221042407U CN 202420812980 U CN202420812980 U CN 202420812980U CN 221042407 U CN221042407 U CN 221042407U
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
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- 239000004593 Epoxy Substances 0.000 claims 1
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Abstract
The utility model discloses a dual-band wireless energy collecting device which comprises an antenna module, a rectifying module and a direct current feed module. The direct current feed module is respectively connected with the antenna module and the rectifying module. The antenna module is integrated with the rectifying module, adopts a novel electromagnetic metamaterial structure and is used for absorbing specific frequency, such as 2.45GHz and 5GHz, dual-band wireless energy in the environment; the rectification module adopts diodes of specific types, and the diodes are integrated into the antenna module by using a parallel topology structure to realize rectification; the direct current feed module adopts a chip inductor connected with the first two modules in series and a chip capacitor connected in parallel to form a direct current filter. The utility model can realize wireless energy collection, thereby being convenient for supplying power to the intelligent equipment with micro power consumption and further being convenient for solving the charging problem of small facilities in real life and emergency.
Description
Technical Field
The utility model relates to the technical field of wireless energy collection, in particular to a dual-band wireless energy collection device.
Background
In recent years, the problem of energy shortage is aggravated, and the battery power supply generates great harm to the environment while increasing the cost of the sensing node, and the traditional wired power supply mode is also gradually difficult to meet the requirements of multiple application scenes. Therefore, new energy development and energy reuse have become a popular subject of research by all parties.
Nowadays, wireless communication devices are seen everywhere, and free and green radio frequency energy generated at the moment is filled in living environment, such as radio frequency energy in two frequency bands of 2.45GHz and 5GHz generated by mobile phone hotspots in the environment. If the intelligent charging device is utilized, the energy burden can be reduced to a certain extent, the power supply for the intelligent equipment with micro power consumption is realized, and the charging problem of small facilities in real life and emergency situations is solved. Therefore, it is necessary to provide a wireless energy harvesting device to solve the above technical problems.
Disclosure of utility model
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model aims to provide a dual-band wireless energy collection device which can realize wireless energy collection, so as to be convenient for supplying power to micro-power consumption intelligent equipment and further solve the charging problem of small facilities in real life and emergency situations.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
a dual band wireless energy harvesting device, comprising:
The antenna module and the rectifying module are integrated, the antenna module comprises a first metal layer, a dielectric layer and a second metal layer from top to bottom, the dielectric layer and the two metal layers are mutually attached, the first metal layer comprises a plurality of periodic surface arrays, each periodic surface array comprises two via hole metal bonding pads, two non-via hole metal bonding pads and four diodes, and the via hole metal bonding pads and the non-via hole metal bonding pads are alternately arranged and distributed in a shape of a Chinese character 'tian'; each via metal pad and the adjacent non-via metal pad are connected with a diode, the non-via metal pads are connected with each other to form a direct current power supply anode, the via metal pads are connected with each other to form a direct current power supply cathode, and four diodes form a rectifying module;
The direct current feed module is respectively connected with the antenna module and the rectifying module; the antenna module is used for collecting 2.45GHz and 5GHz dual-band wireless energy, the wireless energy is rectified into direct current through the rectification module, and the direct current is subjected to direct current filtering treatment through the direct current feed module to supply power to a load.
Optionally, the second metal layer is a square metal backboard with four through holes, the second metal layer is connected with the first metal layer through the through holes, and the first metal layer, the dielectric layer and the second metal layer form an electromagnetic metamaterial structure.
Optionally, a slot is provided in the middle of each side of each metal pad without via hole and each metal pad without via hole, a branch connection structure is provided on the slot, and each metal pad without via hole and adjacent metal pad without via hole are connected with a diode through respective branch connection structures.
Optionally, the branch connection structure of the metal pad without the via is connected with the cathode of the diode, and the branch connection structure of the metal pad without the via is connected with the anode of the corresponding diode.
Optionally, the two metal pads without the through holes are connected through metal wires.
Optionally, the side length ratio of the non-via metal pad to the via metal pad is 95:63; the branch connection structures of the non-via metal pad and the via metal pad are rectangular structures, and the length ratio of the branch connection structures of the non-via metal pad and the via metal pad is 69:20.
Optionally, each of the non-via metal pads and the adjacent via metal pad form an equivalent power supply, and the equivalent power supply is connected in parallel with the corresponding diode.
Optionally, the direct current feed module comprises an inductor and a capacitor, wherein the inductor is connected with the positive electrode of the direct current power supply, and the capacitor is connected between the positive electrode of the direct current power supply and the negative electrode of the direct current power supply in parallel.
Optionally, the diode is a model HSMS-7630 or model HSMS-2860 diode.
Optionally, the dielectric layer is made of epoxy resin material, and the metal layer is made of copper material.
The utility model has at least the following technical effects:
1. The utility model provides a dual-band wireless energy collection device, which comprises an antenna module, a rectifying module and a direct current feed module, wherein the direct current feed module is respectively connected with the antenna module and the rectifying module, the antenna module comprises a first metal layer, a dielectric layer and a second metal layer which are mutually attached from top to bottom, the first metal layer comprises a plurality of periodic surface arrays, each periodic surface array comprises two through hole metal pads, two non-through hole metal pads and four diodes, the through hole metal pads and the non-through hole metal pads are alternately arranged to form a field-shaped distribution, each non-through hole metal pad and an adjacent through hole metal pad form an equivalent power supply, the equivalent power supply is connected with the corresponding diode in parallel, the first metal layer and the second metal layer are connected through a through hole, the non-through hole metal pads on the first metal layer are mutually connected to form a direct current power supply anode, the first metal layer, the dielectric layer and the second metal layer form an electromagnetic metamaterial structure, each diode and each equivalent power supply are connected in parallel to form a parallel rectifying circuit, and the device can collect direct current energy through the antenna and the wireless power supply through the rectifying module to the direct current energy through the rectifying module of 2.45GHz and the wireless frequency band, and then the direct current energy can be processed through the rectifying module. The working frequency band of the device accords with the radio frequency energy frequency band of the mobile phone hot spot at present, the conventional combined circuit and the conventional matching circuit are eliminated, the size of the device is reduced, the structure is simple, and the device is made of the easily-obtained epoxy resin material and the easily-obtained metal material, so that the cost is low and the manufacturing is convenient.
2. The refractive index parameter of the device is close to zero at the frequency bands of 2.4GHz-2.48GHz and 5GHz, the reflectivity parameter is smaller than-10 db, and the ideal energy absorptivity can reach more than 95%, so that the device has good antenna indexes.
3. The utility model is suitable for mobile phone hot spot dual-band energy absorption, so the utility model can be applied to a power supply system of portable equipment, has wide application prospect in equipment with shorter battery life such as a smart watch, a wireless earphone and the like, does not need batteries and charging equipment in some emergency, and can supply power for equipment such as a flashlight and the like in time, thereby providing more opportunities for rescue.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
Fig. 1 is a schematic structural diagram of a dual-band wireless energy harvesting apparatus according to an embodiment of the present utility model.
FIG. 2 is a schematic diagram of a single periodic surface array structure on a first metal layer according to an embodiment of the present utility model.
Fig. 3 is an equivalent circuit diagram of a device according to an embodiment of the present utility model.
FIG. 4 is a schematic diagram of the reflectance of the device at 2GHz-6GHz for the electromagnetic band.
FIG. 5 is a schematic diagram of the ideal energy absorption rate of the device for the electromagnetic wave band at 2GHz-6 GHz.
Detailed Description
The present embodiment is described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The dual band wireless energy harvesting apparatus of the present embodiment is described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a dual-band wireless energy harvesting apparatus according to an embodiment of the present utility model. As shown in fig. 1, the dual-band wireless energy collecting device comprises an antenna module, a rectifying module and a direct current feeding module. The direct current feed module is respectively connected with the antenna module and the rectifying module. The antenna module is integrated with the rectifying module, adopts a novel electromagnetic metamaterial structure and is used for absorbing specific frequency, such as 2.45GHz and 5GHz, dual-band wireless energy in the environment; the rectification module adopts diodes of specific types, and the diodes are integrated into the antenna module by using a parallel topology structure to realize rectification; the direct current feed module adopts a chip inductor connected with the first two modules in series and a chip capacitor connected in parallel to form a direct current filter.
In this embodiment, after the antenna module collects wireless energy with a specific frequency in the environment, the wireless energy is rectified into direct current by the rectification module, and then the direct current is subjected to direct current filtering treatment by the direct current feeding module to supply power to a load such as a micro-power device.
In one embodiment of the present utility model, the antenna module includes a first metal layer, a dielectric layer and a second metal layer from top to bottom, the dielectric layer and the two metal layers are mutually attached, and the first metal layer includes a plurality of periodic surface arrays.
FIG. 2 is a schematic diagram of a single periodic surface array structure on a first metal layer according to an embodiment of the present utility model. As shown in fig. 2, each periodic surface array includes two non-via metal pads 1, i.e. large metal pads in the figure, two via metal pads 2, i.e. small metal pads in the figure, and four diodes 6, where the via metal pads 2 and the non-via metal pads 1 are alternately arranged and distributed in a shape of a Chinese character 'tian'; each via metal pad 2 and the adjacent non-via metal pad 1 are connected with a diode 6, the non-via metal pads 1 are connected with each other to form a positive electrode of a direct current power supply, namely DC+ in fig. 3, the via metal pads 2 are connected with each other to form a negative electrode of the direct current power supply, namely DC-in fig. 3, and four diodes 6 form a rectifying module.
Furthermore, a slot is arranged in the middle of each side of each non-via metal bonding pad 1 and each via metal bonding pad 2, and a branch connection structure is arranged on the slot. For example, the first branch connection structure 3 is arranged on the slot of the metal pad 1 without the via hole, and the second branch connection structure 4 is arranged on the slot of the metal pad 2 without the via hole. Each non-via metal pad 1 and the adjacent via metal pad 2 are connected to a diode 6 by a respective branch connection structure.
Further, the branch connection structure of the non-via metal pad 1 is connected to the cathode of the diode 6, and the branch connection structure of the via metal pad 2 is connected to the anode of the corresponding diode 6.
Wherein, the side length ratio of the non-via metal bonding pad 1 to the via metal bonding pad 2 is 95:63; the branch connection structures of the non-via metal bonding pad 1 and the via metal bonding pad 2 are rectangular structures, and the length ratio of the branch connection structures of the non-via metal bonding pad 1 and the via metal bonding pad 2 is 69:20.
The two metal pads 1 without via holes are connected by metal wires, thereby forming a positive electrode of a direct current power supply. The second metal layer is a square metal backboard with four through holes, and the through hole metal bonding pads 2 on the second metal layer and the first metal layer are connected through the through holes and grounded, so that an equipotential surface which is the same as the ground potential is formed, and the direct current power supply negative electrode is formed.
Specifically, the first metal layer includes a large square metal pad without a via hole, namely a via hole metal pad 1, a small square metal pad with a central via hole, namely a via hole metal pad 2, four rectangular branches in the center of each side of the via hole metal pad 1, namely a first branch connecting structure 3, four rectangular branches in the center of each side of the via hole metal pad 2, namely a second branch connecting structure 4, and four diodes 6 uniformly arranged at each rectangular branch, wherein the second metal layer is a square metal copper backboard with four via holes, the side length is 40mm, and the second metal layer is connected with the first metal layer through the four central metal via holes to form an electromagnetic resonance structure. The metal layer is made of copper material. The dielectric layer is made of epoxy resin material, and is cuboid, and the length and width are both 40mm and the thickness is 1.2mm. The first metal layer, the dielectric layer and the second metal layer form an electromagnetic metamaterial structure.
The whole device of the embodiment has the volume ofThe copper thickness of the metal layer is 35 μm. The large square metal pad without a via hole, namely, the metal pad without a via hole 1, has a side length of l1=20mm, the small square metal pad with a central via hole, namely, the metal pad with a via hole 2, has a side length of l11=12.6mm, the rectangular slot in the center of each side of the large square metal pad has a length of 6.9mm and a width of 3mm, and the large rectangular branch in the center of the slot, namely, the first branch connecting structure 3, has a length of 6.9mm and a width of 1mm. The rectangular slot in the center of each side of the small square metal bonding pad has a length of 2mm and a width of 3mm, and the small rectangular branch in the center of the slot, namely the second branch connecting structure 4, has a length of 2mm and a width of 1mm. In this embodiment, all circular vias have a diameter of 1mm. The metal pad without via 1 in this embodiment determines the energy absorbing effect around 2.45GHz in the low frequency band, and the metal pad without via 2 determines the energy absorbing effect around 5GHz in the high frequency band.
In this embodiment, two small rectangular branches, i.e. the second branch connection structures 4, of each via metal pad 2 are connected to the anode of the diode 6, the remaining two small rectangular branches being used for expansion to other periodic surface arrays. Two large rectangular branches of each non-via metal pad 1, i.e. the first branch connection structure 3, are connected to the cathode of the diode 6, the remaining two large rectangular branches being used for expansion to other periodic surface arrays. In the periodic surface array, all via units are grounded through metal vias to form an equipotential surface which is the same as the ground potential, and the equipotential surface is defined as a DC-negative electrode of a direct current power supply; the remaining cells without vias are connected by thin metal lines, corresponding to inductors, to build up a direct current path while blocking radio frequency power, defined as the direct current power supply positive pole dc+.
The connection mode of the diode 6 can be seen in fig. 3. Fig. 3 is an equivalent circuit diagram of a device according to an embodiment of the present utility model. As shown in fig. 3, each metal pad 1 without via and the adjacent metal pad 2 with via form an equivalent power supply, so that four equivalent power supplies E1 to E4 can be formed. Wherein the equivalent power supply is connected in parallel with the corresponding diode.
Specifically, since the metal pad 1 without via is connected to serve as the positive electrode dc+ of the direct current power supply, and the metal pad 2 without via is connected to serve as the negative electrode DC-, the positive electrode of the equivalent power supply formed by the metal pad 1 without via and the adjacent metal pad 2 with via is dc+, and the negative electrode of the equivalent power supply formed by the two is DC-, which can be obtained by combining fig. 2 and 3. Wherein, the positive pole of the equivalent power supply is connected with the cathode of the diode 6, and the negative pole of the equivalent power supply is connected with the anode of the diode 6. Thus, adjacent non-via metal pads 1 and via metal pads 2 form a certain potential difference across diode 6, providing energy for the back-end module.
The diode 6 needs to be a diode device of a specific model. The diode 6 in this embodiment may be an HSMS-7630 diode, an HSMS-2850 diode, or an HSMS-2860 diode. The low-power application can adopt an HSMS-7630 diode, the medium-power application can adopt an HSMS-2850 diode, the high-power application can adopt an HSMS-2860 diode, and the rectification module can support direct rectification of corresponding absorption frequencies, for example, can support electromagnetic wave absorption of double frequency bands of 2.45GHz and 5GHz and can directly rectify. In addition, the four diodes 6 in the present embodiment are distributed in a central symmetry manner with respect to the geometric center of the antenna module, and constitute a parallel rectifying circuit in fig. 3.
As shown in fig. 3, the dc feed module includes an inductor L and a capacitor C, where the inductor L is connected to the output end of the dc power supply, and the capacitor C is connected in parallel between the positive and negative output ends of the dc power supply.
Specifically, the dc feed module includes a 47nH chip inductor in series with the antenna module and a 0.1 μf chip capacitor in parallel, both of which constitute a dc filter to realize a smooth waveform and provide a dc path.
FIG. 4 is a schematic diagram of the reflection coefficient S11 of the device for the electromagnetic wave band at 2GHz-6 GHz. As shown in fig. 4, it can be observed that the input reflection coefficient S11 of the electromagnetic wave at the frequency points of 2.45GHZ and 5GHZ is less than-10 db, which indicates that electromagnetic energy in the hot spot frequency band of the mobile phone can be better collected.
FIG. 5 is a schematic diagram of the ideal energy absorption rate η of the device for the electromagnetic band at 2GHz-6 GHz. Considering that the energy is mainly refracted and reflected after being incident, the energy absorption rate eta, eta can be estimated preliminarilyThe refractive index S21 is almost zero under the combination of the structure, so that the energy absorption rate of the device at the positions of 2.4GHz-2.48GHz and 5GHz of the target frequency band can reach 95%, the double-frequency-band wireless energy collecting device is good in effect, the device can be applied to collecting double-frequency-band wireless energy facing mobile phone hot spots, and the device can be further put into practical application.
In summary, the utility model provides a dual-band wireless energy collection device, the device includes an antenna module, a rectifying module and a direct current feed module, wherein the direct current feed module is respectively connected with the antenna module and the rectifying module, the antenna module includes a first metal layer, a dielectric layer and a second metal layer which are mutually attached from top to bottom, the first metal layer includes a plurality of periodic surface arrays, each periodic surface array includes two via hole metal pads, two non-via hole metal pads and four diodes, the via hole metal pads and the non-via hole metal pads are alternately arranged to form a field-shaped distribution, each non-via hole metal pad and an adjacent via hole metal pad form an equivalent power supply, the equivalent power supply is connected in parallel with the corresponding diode, the first metal layer and the second metal layer are connected through a via hole, the non-via hole metal pads on the first metal layer are mutually connected to form a direct current power supply anode, the first metal layer, the dielectric layer and the second metal layer form an electromagnetic metamaterial structure, each diode is connected with each equivalent power supply in parallel to form a parallel rectifying circuit, and the device can collect direct current energy through the rectifying module through a wireless power supply through a GHz 2.45-GHz and a wireless power supply through the rectifying module. The working frequency band of the device accords with the radio frequency energy frequency band of the mobile phone hot spot at present, the conventional combined circuit and the conventional matching circuit are eliminated, the size of the device is reduced, the structure is simple, and the device is made of an easily-obtained epoxy resin material and a metal material, so that the cost is low and the manufacturing is convenient; in addition, the refractive index parameter of the device is close to zero at the corresponding frequency bands of 2.4GHz-2.48GHz and 5GHz, the reflectivity parameter is smaller than-10 db, and the ideal energy absorptivity can reach more than 95%, so that the device has a specific good antenna index; and because the utility model is suitable for mobile phone hot spot dual-band energy absorption, the utility model can be applied to a power supply system of portable equipment, has wide application prospect in equipment with shorter battery life such as a smart watch, a wireless earphone and the like, does not need batteries and charging equipment in some emergency, and can supply power for equipment such as a flashlight and the like in time, thereby providing more opportunities for rescue.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.
Claims (10)
1. A dual band wireless energy harvesting apparatus, comprising:
The antenna module and the rectifying module are integrated, the antenna module comprises a first metal layer, a dielectric layer and a second metal layer from top to bottom, the dielectric layer and the two metal layers are mutually attached, the first metal layer comprises a plurality of periodic surface arrays, each periodic surface array comprises two via hole metal bonding pads, two non-via hole metal bonding pads and four diodes, and the via hole metal bonding pads and the non-via hole metal bonding pads are alternately arranged and distributed in a shape of a Chinese character 'tian'; each via metal pad and the adjacent non-via metal pad are connected with a diode, the non-via metal pads are connected with each other to form a direct current power supply anode, the via metal pads are connected with each other to form a direct current power supply cathode, and four diodes form a rectifying module;
The direct current feed module is respectively connected with the antenna module and the rectifying module; the antenna module is used for collecting 2.45GHz and 5GHz dual-band wireless energy, the wireless energy is rectified into direct current through the rectification module, and the direct current is subjected to direct current filtering treatment through the direct current feed module to supply power to a load.
2. The dual band wireless energy harvesting device of claim 1, wherein the second metal layer is a square metal back plate with four vias, the second metal layer and the first metal layer are connected by the vias, and the first metal layer, the dielectric layer and the second metal layer form an electromagnetic metamaterial structure.
3. The dual band wireless energy harvesting apparatus of claim 2, wherein a slot is provided in a middle position of each side of each of the non-via metal pads and each of the via metal pads, a branch connection structure is provided on the slot, and each of the non-via metal pads and adjacent via metal pads are connected to a diode through respective branch connection structures.
4. The dual band wireless energy harvesting apparatus of claim 3, wherein the branched connection structure of the non-via metal pad is connected to a cathode of a diode and the branched connection structure of the via metal pad is connected to an anode of a corresponding diode.
5. The dual band wireless energy harvesting apparatus of claim 1, wherein two of the non-via metal pads are connected by a metal wire.
6. The dual band wireless energy harvesting apparatus of claim 1, wherein a side length ratio of the non-via metal pad to the via metal pad is 95:63; the branch connection structures of the non-via metal pad and the via metal pad are rectangular structures, and the length ratio of the branch connection structures of the non-via metal pad and the via metal pad is 69:20.
7. The dual band wireless energy harvesting apparatus of claim 1, wherein each of the non-via metal pads and adjacent ones of the via metal pads form an equivalent power source, the equivalent power source being connected in parallel with a corresponding diode.
8. The dual band wireless energy harvesting apparatus of claim 1, wherein the dc feed module comprises an inductor and a capacitor, the inductor being connected to the dc power supply anode, the capacitor being connected in parallel between the dc power supply anode and the dc power supply cathode.
9. The dual band wireless energy harvesting device of claim 1, wherein the diode is a HSMS-7630 model or a HSMS-2860 model diode.
10. The dual band wireless energy harvesting device of claim 1, wherein the dielectric layer is an epoxy material and the metal layer is a copper material.
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