High inherent quality receiver structure

Abstract

A receiver system for a wireless charging system includes a receiver antenna forming a first planar layer, a shielding material adjacent to the receiver antenna, the shielding material forming a second planar layer, and a dielectric isolation material layer disposed between the receiver antenna and the shielding material layer, the dielectric isolation material having a thickness of 0.1 mm or greater and a dissipation coefficient of 0.01 or less at a 1 MHz frequency, the dielectric isolation material being configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value.

Description

[Technical Field]

[0001] (Related Applications) This application claims priority to and the benefit of U.S. Provisional Patent Application No. 62 / 985,799, filed March 5, 2020, and entitled "HIGH INTRINSIC QUALITY RECEIVER CONSTRUCTION," which is incorporated herein by reference in its entirety. [Background technology]

[0002] In recent years, products that allow wireless charging of electronic devices have gained popularity. It is a future trend that practically any type of device that operates using battery power can be charged wirelessly. Summary of the Invention [Means for solving the problem]

[0003] Various techniques for implementing a high intrinsic quality receiver are disclosed that may be used by embodiments of a wireless charging system to build a wireless charging system receiver that includes a dielectric isolation layer disposed between a shielding material layer and a receiver antenna, where the properties and thickness of the dielectric isolation layer prevent the shielding material layer from reducing the intrinsic quality factor of the receiver antenna.

[0004] In one exemplary aspect, a receiver system for a wireless charging system is disclosed, the receiver system including a receiver antenna forming a first planar layer, a shielding material adjacent to the receiver antenna, the shielding material forming a second planar layer, and a dielectric isolation material layer disposed between the receiver antenna and the shielding material layer, the dielectric isolation material having a thickness of 0.1 mm or greater and a dielectric constant of 0.01 mm or less at a 1 MHz frequency. Dielectric tangent and wherein the dielectric isolation material is configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value.

[0005] In another example embodiment, a method of fabricating a receiver system for a wireless charging system is disclosed, the method including forming a receiver antenna on a first planar layer, forming a first dielectric isolation material on a second planar layer, and forming a shielding material on a third planar layer, the second planar layer being disposed between the first and third planar layers, the first dielectric isolation material being configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value, the first dielectric isolation material having an intrinsic Q value of 0.01 or less at a 1 MHz frequency. Dielectric tangent and a thickness of 0.1 mm or greater.

[0006] These and other aspects are disclosed throughout this document. The present invention provides, for example, the following. (Item 1) 1. A receiver system for a wireless charging system, the receiver system comprising: a receiver antenna forming a first planar layer; a shielding material adjacent to the receiver antenna, the shielding material forming a second planar layer; and a dielectric isolation material layer disposed between the receiver antenna and the shielding material layer; Equipped with The dielectric isolation material has a thickness of 0.1 mm or more and a dielectric constant of 0.01 or less at a frequency of 1 MHz. Dielectric tangent Equipped with A receiver system, wherein the dielectric isolation material is configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value. (Item 2) Item 1. The receiver system of item 1, further comprising a core disposed around or at the center of the receiver antenna to confine magnetic flux generated by the receiver antenna to an area surrounding the receiver antenna. (Item 3) Item 10. The receiver system of item 1, wherein the dielectric isolation material comprises a material with a dielectric constant of about 4 or less at a 1 MHz test frequency. (Item 4) Item 10. The receiver system of item 1, wherein the dielectric isolation material comprises polypropylene plastic. (Item 5) Item 10. The receiver system of item 1, wherein the dielectric isolation material comprises polycarbonate plastic. (Item 6) Item 10. The receiver system of item 1, wherein the shielding material comprises ferrite and the dielectric isolation material comprises one or more polycarbonate sheets with a combined thickness of about 0.1 mm or greater. (Item 7) Item 2. The receiver system of item 1, wherein the target-specific Q value is at least 100. (Item 8) Item 1. The receiver system of item 1, wherein one or more properties of the dielectric isolation material layer are selected to maintain the intrinsic efficiency of the receiver antenna when the receiver antenna is in physical contact with the dielectric isolation material. (Item 9) The dielectric isolation material has a dielectric constant of about 0.0003 at 1 MHz. Dielectric tangent and a dielectric constant of about 2.2. (Item 10) Item 1. The receiver system of item 1, wherein the receiver antenna is configured to receive wireless power from a wireless charging transmitter. (Item 11) Item 10. The receiver system of item 1, wherein the receiver antenna is configured to provide power to an electronic device. (Item 12) 1. A method of fabricating a receiver system for a wireless charging system, the method comprising: forming a receiver antenna on the first planar layer; forming a first dielectric isolation material on the second planar layer; forming a shielding material on the third planar layer; Including, the second planar layer is disposed between the first planar layer and the third planar layer; the first dielectric isolation material is configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value; The first dielectric isolation material has a dielectric constant of 0.01 or less at a frequency of 1 MHz. Dielectric tangent and a thickness of 0.1 mm or greater. (Item 13) Item 13. The method of item 12, further comprising forming a second dielectric isolation material on a fourth planar layer, the fourth planar layer being disposed between the third planar layer and the electronic device. (Item 14) 13. The method of claim 12, further comprising forming a core around or at the center of the receiver antenna to confine magnetic flux generated by the receiver antenna to an area surrounding the receiver antenna. (Item 15) Item 13. The method of item 12, wherein the first dielectric isolation material comprises a material with a dielectric constant of about 4 or less at a 1 MHz test frequency. (Item 16) Item 13. The method of item 12, wherein the first dielectric isolation material comprises at least one of polypropylene plastic or polycarbonate plastic. (Item 17) Item 13. The method of item 12, wherein the shielding material comprises ferrite and the first dielectric isolation material comprises one or more polycarbonate sheets with a combined thickness of about 0.1 millimeters or greater. (Item 18) 13. The method of claim 12, wherein the target-specific Q value is at least 100. (Item 19) Item 13. The method of item 12, wherein one or more properties of the first dielectric isolation material layer are selected to maintain an intrinsic efficiency of the receiver antenna when the receiver antenna is in physical contact with the first dielectric isolation material. (Item 20) Item 13. The method of item 12, wherein the receiver antenna is configured to receive wireless power from a wireless charging transmitter and provide the wireless power to an electronic device. [Brief explanation of the drawings]

[0007] [Figure 1A] FIG. 1A is a representative receiver system architecture for a wireless charging system.

[0008] [Figure 1B] FIG. 1B is another exemplary receiver system configuration for a wireless charging system.

[0009] [Figure 2A] FIG. 2A is a representative receiver system architecture for a wireless charging system for a high intrinsic quality receiver antenna.

[0010] [Figure 2B] FIG. 2B is another exemplary receiver system architecture for a wireless charging system for a high intrinsic quality receiver antenna.

[0011] [Figure 3] FIG. 3 is a representative illustration of a receiver system structure for a wireless charging system including shielding and dielectric isolation materials.

[0012] [Figure 4A] FIG. 4A is a representative first perspective view of a receiver system embedded within a phone case.

[0013] [Figure 4B] FIG. 4B is a representative second perspective view of a receiver system embedded within a phone case.

[0014] [Figure 4C] FIG. 4C is a representative view of the fully assembled phone case.

[0015] [Figure 5] FIG. 5 shows a flow chart of a method for fabricating a receiver system. DETAILED DESCRIPTION OF THE INVENTION

[0016] The intrinsic quality factor, or "Q," of a receiver antenna for a wireless charging system is an important factor in determining how well the wireless charging system performs. The Q of an antenna is a measure of the energy dissipated in the antenna relative to the energy stored in the antenna, and is an indicator of the antenna's efficiency. The higher the Q, the better the antenna can couple to the electromagnetic field, which can result in more power being delivered to the load.

[0017] Conventional wireless charging system receivers are typically not constructed to optimize the intrinsic Q of the antenna. For example, resonant inductive charging pads typically operate when a smartphone or tablet is physically placed on the charging pad.

[0018] The following description describes systems and methods for constructing a wireless charging system receiver that includes a dielectric isolation layer disposed between a shielding material layer and a receiver antenna, the properties and thickness of the dielectric isolation layer preventing the shielding material layer from reducing the intrinsic quality factor of the receiver antenna (i.e., de-Qing the receiver antenna).

[0019] Various embodiments will now be described. The following description provides specific details for a thorough understanding and effective description of these embodiments. However, those skilled in the art will understand that the present invention can be practiced without many of these details. In addition, some well-known structures or functions may not be shown or described in detail to avoid unnecessarily obscuring the relevant description of the various embodiments. The terminology used in the description presented below is intended to be interpreted in its broadest reasonable manner, even when used in conjunction with a detailed description of a specific embodiment of the present invention.

[0020] FIG. 1A illustrates a typical receiver system structure for a conventional wireless charging system. When an electronic device 110 (e.g., a smartphone, tablet, etc.) does not have a wireless charging chip embedded in the electronic device, the receiver structure is typically as illustrated in FIG. 1A. The electronic device 110 typically has a receiver sandwiched between the device and its case or embedded directly in the device case. The receiver includes a shielding layer or shielding material 120 between the device 110 and a receiver antenna 180. The shielding material 120 can be a high-permeability, low-loss material at wireless power transmission frequencies such as 100 kHz or 6.78 MHz. This construction method is also typical for a wireless charging receiver embedded directly in the device.

[0021] In FIG. 1B, the receiver system of FIG. 1A may include a core 190 located around (e.g., below and / or to the sides and / or at the center of) the antenna 180 to confine magnetic flux to an area surrounding the antenna 180.

[0022] The quality factor (“Q”) of the antenna 180 is reduced in the receiver structure of FIGS. 1A and 1B. There are several reasons why the receiver structure of FIGS. 1A and 1B de-Qs the receiver antenna. For example, because the shielding material 120 is in direct contact with the receiver antenna 180, it may add additional resistance to the antenna 180, thereby reducing the antenna's intrinsic Q. This may seem counterintuitive because the shielding material 120 is typically intended to shield the receiver antenna 180 from electronic devices such as smartphones. However, while the shielding material 120 may partially shield the antenna 180 from metallic or conductive structures within the electronic device 110, the shielding material 120 also reduces the intrinsic Q of the receiver antenna 180 by introducing additional resistance by contacting the antenna traces. This results in a further reduction in the intrinsic Q of the receiver antenna 180.

[0023] While the receiver structures of FIGS. 1A and 1B may work well for low-power signals, such as those used for radio frequency identification (RFID) tags, these structures are not effective or efficient for wireless power transfer, particularly for the transfer of high power in the milliwatt range and above, and for high-frequency signals. Applications in which the physical separation between the transmitter (e.g., a wireless charging pad) and the receiver (e.g., a smartphone) is small (e.g., a few millimeters) may not require a high-specific Q receiver antenna. The need for a high specific Q may be mitigated in other applications, such as RFID tags, where the primary design focus may be signal integrity rather than power efficiency. However, maintaining a high specific Q is an important design criterion in applications in which the transmitter and receiver are physically located far apart (e.g., for loosely coupled wireless charging systems). A high specific Q is also an important design criterion in applications in which power efficiency is particularly important (e.g., in low-power or battery-operated systems). Thus, there is a need for a construction method that maintains a high specific Q of the receiver antenna. An example of a high intrinsic Q is a Q greater than about 100 (eg, 200-800).

[0024] 2A is an exemplary receiver structure for a wireless charging system that implements and maintains a high intrinsic quality receiver antenna. In the structure of FIG. 2A , a dielectric isolation material layer 210 is placed between the antenna 180 and the shielding material layer 120. The electronic device 110 is placed in close proximity to the shielding material 120. In some embodiments, the electronic device 110 is separated from the shielding material 120 by a distance 220A. In some embodiments, the spacing 220A is zero, or the electronic device is placed directly on the shielding material 120. In other embodiments, the spacing 220A may be a fixed spacing due to the case material, e.g., the plastic material of a phone or tablet case, and the spacing material may be similar to a dielectric isolation material.

[0025] The dielectric isolation material 210 acts as a physical buffer between the receiver antenna 180 and the shielding material 120. Unlike the shielding material 120, which de-Qs the receiver antenna as discussed above, the dielectric isolation material 210 does not impose certain properties (e.g., low Q) required to maintain constant intrinsic efficiency of the antenna. Dielectric tangent and a low dielectric constant). In some embodiments, the dielectric isolation material 210 has a dielectric constant of about 0.0003 at 1 MHz. Dielectric tangent and a dielectric constant of about 2.2 at 1 MHz. Therefore, physical contact of the antenna with the dielectric isolation material 210 will have a minimal effect on reducing the intrinsic efficiency 180 of the receiver antenna.

[0026] Generally, it is desirable for the dielectric isolation material 210 to be several millimeters thick. However, the thickness of the dielectric isolation material 210 can be reduced to allow it to fit within the size constraints of the intended application. For example, a smartphone receiver accessory may be very thin (e.g., 1-2 mm) in order to physically fit between the smartphone and the phone case. Similarly, the receiver needs to be thin (e.g., 1-3 mm) in order to fit inside a modified phone case with the receiver embedded inside. In such applications, the dielectric isolation material will need to be thinner. For example, at a test frequency of approximately 1 MHz, a thickness of at least 0.1 mm and a thickness of 0.01 or less will be required. Dielectric tangent The dielectric isolation material 210 with the shielding material 120 can more effectively physically isolate the receiver antenna 180 from the shielding material 120.

[0027] In some embodiments, the shielding material 120 may be ferrite, the dielectric isolation material 210 may be made from a polycarbonate plastic sheet with a thickness of about 0.1 mm or more (e.g., 0.4 mm individually or combined), and the receiver antennas may be connected to their respective printed circuit boards (PCBs). In this configuration, the receiver may have minimal spacing (e.g., 0.1 mm) to zero spacing between the electronic device and the shielding material. That is, spacing 220A may be close to zero. In some embodiments, the dielectric isolation material may be about 0.2 mm to about 0.5 mm thick, but may have a wider range depending on the receiver configuration selected.

[0028] In some embodiments, a separator can occupy the gap 220A between the shielding material and the electronic device. The separator can be another low-profile material such as polycarbonate plastic with a thickness of about 0.4 mm. Dielectric tangent For example, the separator in space 220A can be a low-cost material in a receiver case, such as in a phone or tablet case. Dielectric tangent It can be plastic.

[0029] 2B is another exemplary receiver structure for a wireless charging system for a high-specific-quality receiver antenna. In FIG. 2B, a core 190 is positioned below the antenna to help confine magnetic flux to the area of the antenna. In some embodiments, depending on the antenna structure, the core 190 can be located around the antenna, at the center of the antenna, or otherwise relative to the antenna to confine magnetic flux generated to areas around, inside, or near the antenna.

[0030] In one embodiment, the antenna can include one or more coils arranged as a surface spiral coil, each coil consisting of a continuous conductor without interruptions or radio frequency discontinuities. The conductor can be wrapped around a dielectric material at an angle to reduce proximity effects at the operating frequency of the wireless charging transmitter device and to maintain a high intrinsic quality factor ("Q") of the surface spiral coil at the operating frequency. The continuous conductor can have a thickness of approximately 40 μm.

[0031] To fabricate a receiver for a wireless charging system, the receiver antenna 180 may be formed on a first planar layer, the dielectric isolation material 210 may be formed on the second planar layer, and the shielding material 120 may be formed on the third planar layer, such that a second planar layer is disposed between the first and third planar layers (i.e., the dielectric isolation material 210 forming the second layer is sandwiched between the receiver antenna 180 and the shielding material 120). The dielectric isolation material is configured to maintain an intrinsic Q value of the receiver antenna above a target intrinsic quality Q, has a thickness of at least 0.1 mm, and, for the selected dielectric isolation material, has a Q of 0.01 or less at a test frequency of about 1 MHz. Dielectric tangent It has.

[0032] In some embodiments, a core can be formed around the antenna 180 to confine the magnetic flux generated by the antenna 180 to an area surrounding the antenna 180. Additionally, the area within the separation distance 220B can include a second dielectric isolation material on a fourth planar layer, with the fourth planar layer being disposed between the third planar layer (shielding material 120) and the electronic device 110. Like the first dielectric isolation material layer between the antenna 180 and the shielding material layer 120, the second dielectric isolation material layer is configured to maintain certain properties in the isolation material to maintain the intrinsic Q of the receiver above a target intrinsic Q value. The second dielectric isolation material can have a thickness of 0.01 or less at a test frequency of about 1 MHz. In some embodiments, for example, in a resonant inductive system, the target intrinsic Q value is at least 100. In other embodiments, the target intrinsic Q value is at least 700. The second dielectric isolation material, for example, the central frame of a phone case, can be configured to maintain certain properties (e.g., a certain Q value) so as not to degrade the performance of the receiver. Dielectric tangent ) must have a high intrinsic Q. Dielectric tangent If plastic (e.g., ABS plastic) is used for either the first or second dielectric isolation material, the intrinsic Q can be reduced by more than 50%. Furthermore, the intrinsic Q can also be reduced by more than 50% if the antenna traces directly contact the shielding material (e.g., in the construction methods of FIGS. 1A and 1B).

[0033] 3 is a representative illustration of a receiver structure for a wireless charging system including shielding and dielectric isolation materials. The representative embodiment disclosed in this illustration includes a shielding material 310 (e.g., a ferrite shielding material), a dielectric isolation material 320 (e.g., made of one or more polycarbonate plastic sheets with a total thickness of about 0.4 mm), and a receiver antenna 330 connected to its respective PCB. In one embodiment, the shielding material 310 has a dielectric isolation coefficient of 0.01 or less at a frequency of about 1 MHz. Dielectric tangent and a thickness of at least 0.1 mm, provides adequate physical insulation of the receiver antenna 330 from the shielding material 310.

[0034] 4A and 4B are representative perspective views of a receiver embedded within a phone case, and FIG. 4C is a representative view of a fully assembled phone case. The representative embodiment shown includes the same structure as the receiver in FIG. 3, but because the receiver is embedded within the case, the separation distance between the electronic device and the shielding material 220B is as low as 0.01 mV or less at approximately 1 MHz frequencies relative to the second separation distance material within the phone case. Dielectric tangent The placement of this additional material between the electronic device and the shielding layer can also improve performance. Dielectric tangent The antennas and their respective PCBs 415 are shown along with the isolation and shielding materials. The plastic parts for the holders for the antennas within the case in structure 410 are made of low-profile plastic to improve performance. Dielectric tangent 4B. Structure 420 shows the back of the phone case behind structure 410. When structure 420 is combined with structure 410, it looks like structure 440 in FIG. 4B. Connector plug 465 is visible in structure 440 and in the fully assembled case 460 of FIG. 4C. Structure 430 in FIG. 4A shows an overlay sheet, which is the equivalent of a second separation material (or can be replaced by another layer of shielding, depending on the application).

[0035] In some embodiments, an electronic device may include a wireless charging receiver as described herein. The electronic device may be any user device that uses a battery or cell as a power source, such as a mobile phone, portable device, etc. The electronic device may include industrial electronics, such as automotive, aerospace, agricultural equipment, and electronic systems used for vehicle navigation, in-vehicle control, automated guided vehicles (AGVs), and airplane electronics.

[0036] U.S. Patent Application No. 15 / 759,473 (Publication No. US2018 / 0262050), which is incorporated herein by reference in its entirety, describes some example coil configurations that may use the techniques described herein.

[0037] A list of solutions preferably implemented by some embodiments can be described using the following appendices.

[0038] Appendix 1. A receiver system for a wireless charging system, the receiver system comprising: a receiver antenna forming a first planar layer; a shielding material adjacent to the receiver antenna, the shielding material forming a second planar layer; and a dielectric separation material layer disposed between the receiver antenna and the shielding material layer, the dielectric separation material having a thickness of 0.1 mm or more and a Dielectric tangent The dielectric separation material is configured to maintain the quality factor "Q" value of the receiver antenna above a target intrinsic Q value. Some exemplary embodiments are described with respect to FIGS. 1A-3.

[0039] Appendix 2. The receiver system according to Appendix 1, further comprising a core disposed around or at the center of the receiver antenna to limit the magnetic flux generated by the receiver antenna in the area around the receiver antenna.

[0040] Appendix 3. The receiver system according to Appendix 1, wherein the dielectric separation material comprises a material having a dielectric constant of about 4 or less at a 1 MHz test frequency.

[0041] Appendix 4. The receiver system according to Appendix 1, wherein the dielectric separation material comprises polypropylene plastic.

[0042] Appendix 5. The receiver system according to Appendix 1, wherein the dielectric separation material comprises polycarbonate plastic.

[0043] Appendix 6. The receiver system according to Appendix 1, wherein the shielding material comprises ferrite and the dielectric separation material comprises one or more polycarbonate sheets with a combined thickness of about 0.1 mm or more.

[0044] Appendix 7. The receiver system according to Appendix 1, wherein the target intrinsic Q value is at least 100.

[0045] Clause 8. The receiver system of Clause 1, wherein one or more properties of the dielectric isolation material layer are selected to maintain an intrinsic efficiency of the receiver antenna when the receiver antenna is in physical contact with the dielectric isolation material.

[0046] Appendix 9. The dielectric isolation material has a capacitance of approximately 0.0003 at 1 MHz. Dielectric tangent and a dielectric constant of about 2.2.

[0047] Clause 10. The receiver system of clause 1, wherein the receiver antenna is configured to receive wireless power from the wireless charging transmitter.

[0048] Clause 11. The receiver system of Clause 1, wherein the receiver antenna is configured to provide power to the electronic device.

[0049] Appendix 12. A method of fabricating a receiver system for a wireless charging system (e.g., the method depicted in FIG. 5), the method including forming a receiver antenna on a first planar layer (510), forming a first dielectric isolation material on a second planar layer (520), and forming a shielding material on a third planar layer (530), the second planar layer being disposed between the first and third planar layers, the first dielectric isolation material being configured to maintain an intrinsic quality factor "Q" value of the receiver antenna above a target intrinsic Q value, the first dielectric isolation material having an intrinsic Q of 0.01 or less at a 1 MHz frequency. Dielectric tangent and a thickness of 0.1 mm or greater. For example, the method can be used to fabricate the receiver systems depicted in the drawings in Figures 1A-4C.

[0050] Clause 13. The method of clause 12, further comprising forming a second dielectric isolation material on the fourth planar layer, the fourth planar layer being disposed between the third planar layer and the electronic device.

[0051] Clause 14. The method of clause 12, further comprising forming a core around or at the center of the receiver antenna to confine magnetic flux generated by the receiver antenna to an area surrounding the receiver antenna.

[0052] Clause 15. The method of clause 12, wherein the first dielectric isolation material comprises a material with a dielectric constant of about 4 or less at a 1 MHz test frequency.

[0053] Clause 16. The method of clause 12, wherein the first dielectric isolation material comprises at least one of polypropylene plastic or polycarbonate plastic.

[0054] Clause 17. The method of clause 12, wherein the shielding material comprises ferrite and the first dielectric isolation material comprises one or more polycarbonate sheets with a combined thickness of about 0.1 millimeters or greater.

[0055] Clause 18. The method of clause 12, wherein the target-specific Q value is at least 100.

[0056] Clause 19. The method of clause 12, wherein one or more properties of the first dielectric isolation material layer are selected to maintain the intrinsic efficiency of the receiver antenna when the receiver antenna is in physical contact with the first dielectric isolation material.

[0057] Clause 20. The method of clause 12, wherein the receiver antenna is configured to receive wireless power from the wireless charging transmitter and provide wireless power to the electronic device. (remarks)

[0058] The figures and the above description provide a brief, general description of a suitable environment in which the present invention may be implemented. The above detailed description of examples of the present invention is not intended to be exhaustive or to limit the present invention to the precise form disclosed above. Specific examples of the present invention are described above for illustrative purposes, but various equivalent modifications are possible within the scope of the present invention, as those skilled in the relevant art will recognize. For example, while processes or blocks are shown in a given order, alternative implementations may perform routines having steps / blocks or employ systems having blocks in a different order, and some processes or blocks may be deleted, moved, added, further divided, combined, or modified to provide alternative or subcombinations. Each of these processes or blocks may be implemented in a variety of different ways. While processes or blocks are sometimes shown as being performed sequentially, these processes or blocks may instead be performed or implemented in parallel, or may be performed at different times. Furthermore, any specific numbers referred to herein are merely examples. Alternative implementations may employ different values or ranges. For example, for implementation, a tolerance of up to ±10 percent may be used.

[0059] These and other changes can be made to the invention in light of the above detailed description. While the above description illustrates certain examples of the invention and sets forth the best contemplated mode, no matter how detailed the above appears in the text, the invention can be practiced in many ways. While the details of the system may vary significantly in its specific implementation, it is still encompassed by the invention disclosed herein. As noted above, terminology used when describing certain features or aspects of the invention should not be taken to imply that the terminology be redefined herein to be limited to any specific characteristic, feature, or aspect of the invention with which it is associated. In general, the terms used in the following claims should not be construed to limit the invention to the specific examples disclosed herein unless the Detailed Description section above explicitly defines such terms. Therefore, the actual scope of the invention encompasses not only the disclosed examples but also all equivalent ways of practicing or implementing the invention under the claims.

Claims

1. A receiver system for a wireless charging system, the receiver system comprising: a receiver antenna forming a first planar layer; a shielding material adjacent to the receiver antenna, the shielding material forming a second planar layer; a dielectric separation material layer disposed between the receiver antenna and the shielding material; and the dielectric separation material layer being in physical contact with the receiver antenna; the dielectric separation material layer having a thickness of 0.1 mm or more and a dielectric tangent of 0.01 or less at a frequency of 1 MHz; the dielectric separation material layer being configured to maintain the quality factor "Q" value of the receiver antenna above a target Q value, the receiver system.

2. The receiver system according to claim 1, further comprising a core disposed around or at the center of the receiver antenna to limit the magnetic flux generated by the receiver antenna to an area around the receiver antenna.

3. The dielectric separation material layer is a material with a relative permittivity of 4 or less at a test frequency of 1 MHz, and / or is a polypropylene plastic, and / or is a polycarbonate plastic, and / or has a dielectric tangent of 0.0003 and a relative permittivity of 2.2 at 1 MHz the receiver system according to claim 1.

4. The receiver system according to claim 1, wherein the shielding material comprises ferrite, and the dielectric separation material layer comprises one or more polycarbonate sheets with a combined thickness of 0.1 mm or more.

5. The receiver system according to claim 1, wherein the target Q value is at least 100.

6. The receiver system according to claim 1, wherein one or more properties of the dielectric separation material layer are selected to maintain the intrinsic efficiency of the receiver antenna when the receiver antenna is in physical contact with the dielectric separation material layer.

7. The receiver antenna is configured to receive wireless power from a wireless charging transmitter and / or provide power to an electronic device the receiver system according to claim 1.

8. A method of manufacturing a receiver system for a wireless charging system, the method comprising: forming a receiver antenna layer; forming a first dielectric separation material layer; forming a shielding material layer and The first dielectric isolation material layer is disposed between the receiver antenna layer and the shielding material layer, and the first dielectric isolation material layer is in physical contact with the receiver antenna layer. The first dielectric isolation material layer is configured to maintain the quality factor "Q" value of the receiver antenna layer above a target intrinsic Q value. The first dielectric isolation material layer has a dielectric tangent of 0.01 or less and a thickness of 0.1 mm or more at a frequency of 1 MHz. **Claim 9**: The method according to claim 8, further comprising forming a second dielectric isolation material layer, wherein the second dielectric isolation material layer is disposed between the shielding material layer and the electronic device. **Claim 10** The method according to claim 8, further comprising forming a core around or at the center of the receiver antenna layer to limit the magnetic flux generated by the receiver antenna layer to an area around the receiver antenna layer. **Claim 11** The first dielectric isolation material layer is a material with a relative permittivity of 4 or less at a 1 MHz test frequency, and / or at least one of polypropylene plastic or polycarbonate plastic The method according to claim 8. **Claim 12** The shielding material layer comprises ferrite, and the first dielectric isolation material layer comprises one or more polycarbonate sheets with a combined thickness of 0.1 millimeter or more. The method according to claim 8. **Claim 13** The target intrinsic Q value is at least 100. The method according to claim 8. **Claim 14** One or more characteristics of the first dielectric isolation material layer are selected to maintain the intrinsic efficiency of the receiver antenna layer when the receiver antenna layer is in physical contact with the first dielectric isolation material layer. The method according to claim 8. **Claim 15** The receiver antenna layer is configured to receive wireless power from a wireless charging transmitter and provide the wireless power to an electronic device. The method according to claim 8.

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