Antenna coupling device and electronic equipment

Abstract

This application provides an antenna coupling device and an electronic device. The antenna coupling device includes an insulating housing, a driving layer, a conductive layer, a radio frequency (RF) module, and an antenna coupling coil. The insulating housing includes an accommodating space formed by the bottom of the housing, the sidewalls of the housing, and the top of the housing. The driving layer is disposed at the bottom of the housing within the accommodating space. The conductive layer is disposed on the driving layer. The RF module includes a module body and an antenna connected to the module body. The module body is located on the conductive layer, wherein the driving layer provides power and ground signals to the RF module through the conductive layer. The antenna coupling coil is located on the inner wall of the top of the housing and is coupled to the antenna. Thus, with the above structure, the antenna's radiation capability can be enhanced through electromagnetic coupling without changing the antenna configuration of the RF module and without adding an additional feed network, allowing the wireless communication module to achieve greater efficiency within a limited space.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to an antenna coupling device and an electronic device. Background Technology

[0002] With the development of miniaturization and integration technologies, the application of wireless communication modules is becoming increasingly widespread. Wireless communication modules typically include radio frequency circuit design and antenna design, and are a key component of smart device integration. Currently, wireless communication modules are widely used in smart homes, smart cars, and many other fields. However, due to differences in usage environments and product layouts, antenna performance may be affected. If the antenna cannot adapt well to these influences, it may lead to shortened communication distance and a degraded user experience.

[0003] In traditional designs, to save space, the antenna in a wireless communication module is usually integrated with the radio frequency module on the same printed circuit board (PCB). In practical applications, such as door magnets or small wireless sensors, due to size limitations, the wireless communication module can only be placed flat. In this case, the PCB being stacked below the antenna may cause the antenna's resonant frequency to deviate from its operating frequency, resulting in a reduced resonant amplitude and consequently affecting the antenna's radiation efficiency. Furthermore, the relatively small height of the antenna relative to the reference ground leads to a decrease in radiation resistance, which further reduces the antenna's radiation efficiency. Summary of the Invention

[0004] To overcome the technical problems mentioned in the above background, this application provides an antenna coupling device, which includes:

[0005] An insulating housing, including an accommodating space enclosed by the bottom of the housing, the side walls of the housing, and the top of the housing;

[0006] A drive layer is disposed at the bottom of the housing within the accommodating space;

[0007] A conductive layer is disposed on the driving layer;

[0008] A radio frequency module includes a module body and an antenna connected to the module body. The module body is located on the conductive layer, wherein the driving layer provides power signals and ground signals to the radio frequency module through the conductive layer.

[0009] An antenna coupling ring is located on the inner wall of the top of the housing, and the antenna coupling ring is coupled to the antenna.

[0010] In one possible implementation, the orthographic projection of the antenna coupling ring on the bottom of the housing is located outside the orthographic projection of the RF module on the bottom of the housing; or,

[0011] The orthographic projection of the radio frequency module on the bottom of the housing lies within the orthographic projection of the antenna coupling ring on the bottom of the housing.

[0012] In one possible implementation, the antenna coupling loop has a first distance from the bottom of the housing in a direction perpendicular to the plane where the bottom of the housing is located, and the side of the radio frequency module away from the bottom of the housing has a second distance from the bottom of the housing, wherein the first distance is greater than the second distance.

[0013] In one possible implementation, the antenna includes a first end connected to the module body and a second end located away from the module body;

[0014] The antenna coupling coil includes an antenna coupling section close to the antenna, and the distance between the second end of the antenna and the antenna coupling section is greater than or equal to 1 / 60λg and less than or equal to 1 / 50λg, where λg is the wavelength of the electromagnetic wave propagating in the insulating shell.

[0015] In one possible implementation, the width of the antenna coupling segment is greater than or equal to 1 / 60λg and less than or equal to 1 / 50λg.

[0016] In one possible implementation, the second end of the antenna is an antenna segment, and the orthographic projection of the antenna segment on the bottom of the housing is parallel to the orthographic projection of the antenna coupling segment on the bottom of the housing.

[0017] In one possible implementation, the antenna coupling loop is a closed coil, wherein the shape of the antenna coupling loop includes a rectangle, a circle, or a triangle.

[0018] In one possible implementation, the antenna coupling ring is printed on the inner wall of the top of the housing;

[0019] Alternatively, the antenna coupling ring is attached to the inner wall of the top of the housing;

[0020] Alternatively, the antenna coupling ring is engraved on the inner wall of the top of the housing.

[0021] In one possible implementation, the antenna includes a PCB antenna, an SMT patch antenna, a ceramic antenna, a metal wire antenna, or a metal stamping antenna;

[0022] The material of the antenna coupling coil includes conductive metal or conductive non-metal;

[0023] The insulating housing is made of materials including polyester, polyimide, ABS engineering plastic, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, epoxy resin, or glass.

[0024] Another object of this application is to provide an electronic device comprising a plurality of the antenna coupling devices provided in this application.

[0025] Based on any of the above aspects, embodiments of this application provide an antenna coupling device and electronic device. Thus, through the above structure, the antenna's radiation capability can be enhanced through electromagnetic coupling effects without changing the antenna configuration of the RF module or adding an additional feed network, enabling the wireless communication module to achieve greater efficiency within a limited space. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is one of the schematic diagrams of an antenna coupling device provided in this embodiment;

[0028] Figure 2 This embodiment provides an equivalent circuit diagram of an antenna coupling device under ideal conditions.

[0029] Figure 3 for Figure 2 The equivalent circuit diagram is the simplified circuit diagram.

[0030] Figure 4 This is a second schematic diagram of an antenna coupling device provided in this embodiment;

[0031] Figure 5 This is the third schematic diagram of an antenna coupling device provided in this embodiment;

[0032] Figure 6 This is the fourth schematic diagram of an antenna coupling device provided in this embodiment;

[0033] Figure 7 This is one of the partial structural schematic diagrams of an antenna coupling device provided in this embodiment;

[0034] Figure 8 This is a second partial structural schematic diagram of an antenna coupling device provided in this embodiment;

[0035] Figure 9 This is a schematic diagram of the antenna coupling coil provided in this embodiment;

[0036] Figure 10 This embodiment provides a set of two different antenna coupling devices for comparison;

[0037] Figure 11 for Figure 10 Simulation results of antenna radiation efficiency testing using two different antenna coupling devices are shown in the figure.

[0038] Figure 12 This embodiment provides another set of two different antenna coupling devices for comparison;

[0039] Figure 13 for Figure 12 Simulation results of antenna radiation efficiency testing using two different antenna coupling devices are shown in the figure.

[0040] Figure 14 This embodiment provides a practical application of an antenna coupling device in a smart button;

[0041] Figure 15 The simulation results are shown in this embodiment, which compare the results of two different antenna coupling devices used in the smart button.

[0042] Icons: 10-Antenna coupling device, 20-Insulating housing, 30-Drive layer, 40-Conductive layer, 50-RF module, 60-Antenna coupling ring, 200-Housing bottom, 210-Housing side wall, 220-Housing top, 230-Accommodation space, 500-Module body, 510-Antenna, 5101-Antenna segment, 600-Reverse antenna coupling ring, 610-Forward antenna coupling ring, 620-Antenna coupling segment. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0048] In order to solve the technical problems mentioned in the background section, the inventors have innovatively designed the following technical solutions, and the specific implementation scheme of this application will be described in detail below with reference to the accompanying drawings.

[0049] Please see Figure 1 , Figure 1 This is a schematic diagram of an antenna coupling device 10 provided in this embodiment. The antenna coupling device 10 includes: an insulating housing 20, a driving layer 30, a conductive layer 40, a radio frequency module 50, and an antenna coupling ring 60. The insulating housing 20 includes an accommodating space 230 formed by a housing bottom 200, a housing side wall 210, and a housing top 220. The driving layer 30 is disposed in the housing bottom 200 within the accommodating space 230. The conductive layer 40 is disposed on the driving layer 30. The radio frequency module 50 includes a module body 500 and an antenna 510 connected to the module body 500. The module body 500 is located on the conductive layer 40, wherein the driving layer 30 provides power signals and ground signals to the radio frequency module 50 through the conductive layer 40. The antenna coupling ring 60 is located on the inner wall of the housing top 220 and is coupled to the antenna 510.

[0050] In this embodiment, the RF module 50 can be implemented in two ways: one is to integrate the RF circuit (i.e., the module body) and the antenna, which not only saves space but also improves integration. The other is to integrate the RF circuit and the antenna onto the driver board, enabling the driver board to simultaneously perform both control and communication functions, further enhancing the system's functionality and flexibility.

[0051] In this embodiment, the antenna coupling ring 60 is disposed on the inner wall of the top 220 of the housing. The antenna coupling ring 60 and the antenna 510 utilize electromagnetic coupling to improve the radiation performance of the antenna 510. Specifically, the antenna coupling ring 60 and the antenna 510 adjust the input impedance and radiation characteristics of the antenna 510 through the interaction of electromagnetic fields, and the principle is as follows.

[0052] Please see Figure 2 , Figure 2 This is an equivalent circuit model of an antenna coupling device under ideal conditions in this embodiment. L1 represents the equivalent inductance of the RF module, and L2+C1+RL represents the equivalent circuit of the antenna coupling coil, where Z... in L1 represents the overall antenna input impedance, L2 represents the equivalent inductance of the antenna coupling coil, C1 represents the equivalent capacitance of the antenna coupling coil, and RL represents the equivalent resistance of the antenna coupling coil. The RF module and the antenna coupling coil interact through the coupling coefficient (M).

[0053] It is worth noting that the overall antenna input impedance is determined by its real part (equivalent resistance R). in ) and the imaginary part (equivalent inductance X) in Composed of, i.e.: Z in =R in +jX in .

[0054] Therefore, based on the above parameters, the primary impedance can be derived as: Z 11 =jX1=j2ΠfL1, the primary impedance is the impedance of the RF module, and the secondary impedance is: The secondary impedance is the impedance of the antenna coupling coil.

[0055] Please see Figure 3 , Figure 3 for Figure 2 The simplified circuit diagram of the equivalent circuit. Converting the secondary impedance to the primary impedance yields the overall antenna input impedance Z. in ,Right now:

[0056] As can be seen from the above formula, by adjusting the coupling coefficient (M) and the equivalent inductance (L2), equivalent capacitance (C1), and equivalent resistance (R) of the antenna coupling coil, the problem can be solved. L This can optimize the input impedance of the antenna.

[0057] At the same time, when the equivalent inductance (L2) and equivalent capacitance (C1) of the secondary side (i.e., the antenna coupling loop) reach the resonance condition, that is: Z 22 =R L The secondary impedance becomes the equivalent resistance (R). L At this point, the overall antenna input impedance Z in for: The real part of the input impedance is closer to the characteristic impedance of the transmission line, reducing reflection loss and optimizing the input impedance.

[0058] As described above, the real part of the overall antenna input impedance is affected not only by the coupling coefficient (M) but also by the equivalent resistance (R) of the antenna coupling coil. LThe imaginary part is adjusted by the antenna of the RF module due to the influence of [missing information]. Since the antenna of the RF module is invariant, the coupling coefficient (M) and the equivalent resistance (R) of the antenna coupling coil [missing information]. L Since the input impedance of the antenna coupling device can be changed by adjusting the coupling coefficient and the circumference of the antenna coupling coil, the input impedance of the antenna coupling device can be altered.

[0059] From the perspective of antenna impedance theory, "when the current at the antenna input terminal is the antinode current, the input impedance is approximately equal to the radiation resistance."

[0060] (1) Antinode current refers to the current at the resonant point of the antenna system; when the antenna impedance is in a resonant state, the antenna radiated power is at its maximum.

[0061] (2) When the antenna input power is constant, the input current is only affected by the input impedance;

[0062] In summary, by adjusting the input impedance, the input current can be adjusted, which in turn adjusts the antinode current and thus the radiation resistance.

[0063] According to the definition of antenna radiation efficiency: P r For radiated power, P A For input power, R r R is the radiation resistance. loss This refers to the loss resistance. By optimizing the input impedance, reflection losses can be reduced, allowing more input power to be effectively radiated by the antenna, thereby improving the radiation resistance R. r This improves antenna radiation efficiency.

[0064] Additionally, the antenna's radiation resistance R can be increased by adjusting the shape, size, and relative position of the antenna coupling coil. r Alternatively, optimizing the material of the antenna coupling coil and reducing losses inside the antenna and in the environment can lower the loss resistance R. loss Improve radiation efficiency.

[0065] It is worth noting that, through the above structure, the driving layer 30, conductive layer 40, RF module 50, and antenna coupling ring 60 are concentrated within the insulating housing 20, thereby improving the radiation efficiency of antenna 510 through electromagnetic coupling. This not only solves the problem of low antenna efficiency due to the small relative height between antenna 510 and reference ground in the prior art, but also addresses the issue of RF module 50 being unable to achieve optimal matching in the product due to interference from other electronic components.

[0066] Further, please see Figure 4 and Figure 5 , Figure 4 and Figure 5This embodiment provides two implementations of an antenna coupling device. In one implementation, the orthographic projection of the antenna coupling ring 60 onto the bottom 200 of the housing is located outside the orthographic projection of the RF module 50 onto the bottom 200 of the housing, such as... Figure 4 As shown, this is the design of the reverse antenna coupling ring 600. In this design, the reverse antenna coupling ring 600 is located on the side of the RF module 50 away from the bottom of the housing 200, and is offset from the RF module 50. The reverse antenna coupling ring 600 interacts with the reverse electromagnetic field of the antenna 510, which can adjust the radiation characteristics of the antenna 510.

[0067] In another embodiment, the orthographic projection of the RF module 50 onto the bottom 200 of the housing lies within the orthographic projection of the antenna coupling ring 60 onto the bottom 200 of the housing, such as... Figure 5 As shown, this is the design of the forward antenna coupling ring 610. In this design, the forward antenna coupling ring 610 is positioned on the side of the RF module 50 away from the bottom 200 of the housing, and overlaps with the RF module 50. The interaction between the forward antenna coupling ring 610 and the forward electromagnetic field of the antenna 510 can also adjust the radiation characteristics of the antenna 510.

[0068] It is worth noting that the electromagnetic field interaction between the reverse antenna coupling ring 600 and the forward antenna coupling ring 610 and the antenna 510 is different. Some antennas 510 may achieve better impedance matching when reverse coupling, while others may achieve better impedance matching when forward coupling. The forward antenna coupling ring 610 or the reverse antenna coupling ring 600 can be selected to couple with the antenna according to the actual situation to improve radiation efficiency.

[0069] Further, please see Figure 6 , Figure 6 This is a left view of an antenna coupling device 10 provided in this embodiment. In a direction perpendicular to the plane where the bottom 200 of the housing is located, there is a first distance d1 between the antenna coupling ring 60 (not shown) and the bottom 200 of the housing. Since the antenna coupling ring 60 is located on the inner wall of the top 220 of the housing, the first distance d1 is also the distance between the top 220 of the housing and the bottom 200 of the housing. The side of the RF module 50 away from the bottom 200 of the housing has a second distance d2 between it and the bottom 200 of the housing. The first distance d1 is greater than the second distance d2.

[0070] In this embodiment, if the antenna coupling ring 60 and the RF module 50 are too close, a proximity effect may occur, meaning that the electromagnetic fields of the two interact and affect the radiation characteristics of the antenna 510. Therefore, setting the height of the antenna coupling ring 60 to be greater than the height of the RF module 50 can increase the distance between them, optimize the electromagnetic field distribution, thereby optimizing the coupling effect, increasing the radiation resistance, and ultimately improving the radiation efficiency of the antenna 510.

[0071] Further, please see Figure 7 , Figure 7 This is a schematic diagram of the antenna coupling ring 60 and the radio frequency module 50 provided in this embodiment. The antenna 510 includes a first end connected to the module body 500 and a second end away from the module body 500. The antenna coupling ring 60 includes an antenna coupling section 620 near the antenna 510. The distance d between the second end of the antenna 510 and the antenna coupling section 620 is greater than or equal to 1 / 60λg and less than or equal to 1 / 50λg. For example, the distance d between the second end of the antenna 510 and the antenna coupling section 620 includes 1 / 60λg, 1 / 59λg, 1 / 57λg, 1 / 55λg, 1 / 53λg, 1 / 51λg, or 1 / 50λg, etc. Wherein, λg is the wavelength of electromagnetic waves propagating in the medium; specifically, in this embodiment, λg is the wavelength of electromagnetic waves propagating in the insulating shell.

[0072] In this embodiment, as described above regarding the principle of electromagnetic coupling, the effectiveness of electromagnetic coupling is related to the relative position and distance between the antenna coupling coil 60 and the antenna 510. When the antenna coupling coil 60 and the antenna 510 are close together, a higher reflection coefficient may occur, causing more input functions to be reflected back to the source, reducing the effective radiation efficiency, and potentially increasing the loss resistance of the antenna 510, thus reducing radiation efficiency. When the antenna coupling coil 60 and the antenna 510 are far apart, the electromagnetic coupling effect may weaken, resulting in a reduced performance enhancement effect of the antenna coupling coil 60 on the antenna 510, and thus failing to effectively improve radiation efficiency.

[0073] Therefore, specifying the distance between the antenna coupling coil 60 and the antenna 510 within a reasonable range can ensure that the antenna coupling device 10 performs optimally.

[0074] Furthermore, please see again Figure 7 The width w of the antenna coupling segment 620 is greater than or equal to 1 / 60λg and less than or equal to 1 / 50λg. For example, the width w of the antenna coupling segment 620 includes 1 / 60λg, 1 / 59λg, 1 / 58λg, 1 / 56λg, 1 / 52λg, 1 / 51λg, or 1 / 50λg, etc.

[0075] In this embodiment, as described above regarding the principle of electromagnetic coupling, the effectiveness of electromagnetic coupling is also related to the size of the antenna coupling coil 60. The antenna coupling segment 620, as a key area for electromagnetic coupling, has its width w set within a reasonable range to ensure that the antenna coupling coil 60 provides sufficient coupling without increasing excessive losses. If the antenna coupling segment 620 is too wide, it may lead to a decrease in radiation efficiency and increase electromagnetic interference with other electronic devices. If the antenna coupling segment 620 is too narrow, it cannot provide sufficient electromagnetic coupling, resulting in ineffective optimization of input impedance and radiation efficiency.

[0076] Further, please see Figure 4 , Figure 7 and Figure 8 , Figure 8 This is a schematic diagram of the radio frequency module 50 provided in this embodiment. The second end of the antenna 510 is an antenna segment 5101, and the orthographic projection of the antenna segment 5101 on the bottom 200 of the housing is parallel to the orthographic projection of the antenna coupling segment 620 on the bottom 200 of the housing.

[0077] In this embodiment, the parallel projections of antenna segment 5101 and antenna coupling segment 620 on the bottom 200 of the housing help to ensure that the distance between antenna coupling ring 60 and antenna 510 is relatively stable, ensuring that the distance is within the standard range and improving the electromagnetic coupling effect.

[0078] Further, please see Figure 9 , Figure 9 This is a schematic diagram of the antenna coupling coil provided in this application. The antenna coupling coil is a closed coil, which can be a regular-shaped closed coil or an irregular-shaped closed coil. For example, the shape of the antenna coupling coil includes a rectangle, a circle, or a triangle.

[0079] In this embodiment, the closed antenna coupling loop forms a complete magnetic circuit, which can enhance the coupling effect with the antenna. At the same time, the closed antenna coupling loop can form a resonance condition, which helps to adjust the resonant frequency of the antenna.

[0080] In this embodiment, the antenna coupling ring can be disposed on the inner wall of the top of the housing in different ways.

[0081] For example, in one embodiment of this invention, the antenna coupling ring can be printed on the inner wall of the top of the housing. In this embodiment, the antenna coupling ring can be printed on the inner wall of the top of the housing using a printing device, specifically, the printing device may include a screen printer, an inkjet printer, and a gravure printer. The material of the antenna coupling ring can be conductive ink, which is a special ink mainly composed of conductive fillers, binders, additives, and solvents. Conductive fillers include metal powders, metal oxides, non-metals, and other composite powders, binders include synthetic resins, photosensitive resins, and low-melting-point plexiglass, and additives include dispersants, regulators, thickeners, and plasticizers. Simultaneously, a conductive carrier can also be added to flexographic water-based inks or special offset inks to make the ink conductive.

[0082] In another embodiment of this example, the antenna coupling ring can be adhered to the inner wall of the top of the housing. In this embodiment, a thin-film coupling ring can be flatly attached to the inner wall of the top of the housing. The thin-film coupling ring is fabricated using mesh metal film technology, and its main body is mainly composed of conductive metal mesh with a thickness of 0.5–2 μm. The carrier portion of the thin-film coupling ring is mainly colorless and transparent PET (PET is polyethylene terephthalate).

[0083] In another embodiment of this invention, the antenna coupling ring can be engraved on the inner wall of the top of the housing. In this embodiment, laser engraving technology can be used to engrave the conductor on the inner wall of the top of the housing, ensuring that the distance between the antenna coupling ring and the antenna is relatively stable.

[0084] It is worth noting that the antenna coupling coil can also be a designed irregular curved surface, such as a lens or a reflective surface. By utilizing its ability to focus magnetic field energy, and by designing a reasonable focal point, focal length, refractive index, and curvature, the coupling effect can be achieved, thereby improving the antenna's radiation capability.

[0085] Furthermore, the antenna may include a PCB antenna, an SMT patch antenna, a ceramic antenna, a metal wire antenna, or a metal stamping antenna.

[0086] The material of the antenna coupling coil can be a conductive metal or a conductive non-metal.

[0087] The materials of the insulating housing may include polyester, polyimide, ABS engineering plastic, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, epoxy resin or glass.

[0088] In this embodiment, as can be seen from the above description of the electromagnetic coupling principle, optimizing the material of the antenna coupling coil and reducing losses inside the antenna and in the environment can lower the loss resistance R. lossThis improves radiation efficiency. Therefore, when selecting materials for antenna coupling devices, it is necessary to make reasonable choices based on the actual situation and the target effect.

[0089] The following comparison uses simulation data to examine the RF module with and without an antenna coupling coil.

[0090] In the first set of comparative tests in this embodiment, two test devices were used: one was a radio frequency module without an antenna coupling coil, such as... Figure 10 As shown in the middle left figure. Another type is the RF module with a reverse antenna coupling coil, such as... Figure 10 The right-hand figure shows the simulation environment where the antenna operates in the 2.4–2.5 GHz frequency band, the antenna coupling loop circumference C = 119.2 mm, the coupling distance between the antenna coupling loop and the antenna d = 2 mm, and the antenna coupling loop is housed in a plastic shell. The antenna radiation efficiency of the two test devices was tested, and the final simulation results are as follows: Figure 11 As shown, line ① represents the antenna radiation efficiency curve of the RF module with a reverse antenna coupling loop, and line ② represents the antenna radiation efficiency curve of the RF module without an antenna coupling loop. The RF module with the reverse antenna coupling loop exhibits an average antenna radiation efficiency improvement of 8.5% compared to the RF module without an antenna coupling loop.

[0091] In the second set of comparative tests in this embodiment, two test devices were used: one was a radio frequency module without an antenna coupling coil, such as... Figure 12 As shown in the left-middle image. Another type is the RF module with a forward antenna coupling coil, such as... Figure 12 As shown in the right figure, the antenna radiation efficiency was tested under a simulated environment with an antenna operating frequency band of 2.4–2.5 GHz, an antenna coupling loop circumference C = 155.2 mm, a coupling distance d = 2 mm between the antenna coupling loop and the antenna, and the antenna coupling loop being housed in a plastic shell. The final simulation results are as follows. Figure 13 As shown, line ① represents the antenna radiation efficiency curve of the RF module with a forward antenna coupling coil, and line ② represents the antenna radiation efficiency curve of the RF module without an antenna coupling coil. The RF module with a forward antenna coupling coil exhibits an average antenna radiation efficiency improvement of 6.44% compared to the RF module without an antenna coupling coil.

[0092] Please see Figure 14 , Figure 14This application describes the application of an antenna coupling device in a smart button. In the third set of comparative tests in this embodiment, two different smart button modules were used: one with a reverse antenna coupling coil and the other without. Under simulated conditions with the antenna operating frequency band at 2.4–2.5 GHz, a distance of 1.2 mm between the plastic shell (i.e., the smart button's outer casing) and the RF module, and the antenna coupling coil being laser-engraved on the inner top wall of the plastic shell, the antenna radiation efficiency of both smart button modules was tested. The final simulation results are as follows: Figure 15 As shown, line ① represents the antenna radiation efficiency curve of the smart button module with a reverse antenna coupling coil, and line ② represents the antenna radiation efficiency curve of the smart button module without an antenna coupling coil. The smart button module with a reverse antenna coupling coil exhibits an average antenna radiation efficiency improvement of approximately 10% compared to the smart button module without an antenna coupling coil.

[0093] The simulation results obtained from the above three sets of comparative tests show that the antenna radiation efficiency of the RF module with an antenna coupling ring is greater than that of the RF module without an antenna coupling ring, proving that the antenna coupling ring has the effect of improving the antenna's radiation power.

[0094] Based on the same inventive concept, another objective of this application is to provide an electronic device that includes any of the aforementioned antenna coupling devices. The electronic device employing the aforementioned antenna coupling device can optimize the input impedance of the antenna, significantly improve the radiation efficiency of the antenna, thereby increasing the transmission distance and quality of wireless signals, and also enhance the electronic device's ability to receive wireless signals.

[0095] In summary, this application provides an antenna coupling device and an electronic device. The antenna coupling device includes an insulating housing, a driving layer, a conductive layer, a radio frequency (RF) module, and an antenna coupling coil. The insulating housing includes an accommodating space formed by the bottom of the housing, the side walls of the housing, and the top of the housing. The driving layer is disposed at the bottom of the housing within the accommodating space. The conductive layer is disposed on the driving layer. The RF module includes a module body and an antenna connected to the module body. The module body is located on the conductive layer, wherein the driving layer provides power and ground signals to the RF module through the conductive layer. The antenna coupling coil is located on the inner wall of the top of the housing and is coupled to the antenna. Thus, with the above structure, the antenna's radiation capability can be enhanced through electromagnetic coupling without changing the antenna configuration of the RF module and without adding an additional feed network, allowing the wireless communication module to achieve greater efficiency within a limited space.

[0096] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An antenna coupling device, characterized in that, The antenna coupling device includes: An insulating housing, including an accommodating space enclosed by the bottom of the housing, the side walls of the housing, and the top of the housing; A drive layer is disposed at the bottom of the housing within the accommodating space; A conductive layer is disposed on the driving layer; A radio frequency module includes a module body and an antenna connected to the module body. The module body is located on the conductive layer, wherein the driving layer provides power signals and ground signals to the radio frequency module through the conductive layer. An antenna coupling ring is located on the inner wall of the top of the housing, and the antenna coupling ring is coupled to the antenna; The orthographic projection of the radio frequency module on the bottom of the housing is located within the orthographic projection of the antenna coupling ring on the bottom of the housing. The antenna includes a first end connected to the module body and a second end away from the module body. The antenna coupling loop includes an antenna coupling section close to the antenna, and the distance between the second end of the antenna and the antenna coupling section is greater than or equal to 1 / 60. And less than or equal to 1 / 50 ,in, The wavelength of the electromagnetic wave propagating within the insulating shell; The width of the antenna coupling section is greater than or equal to 1 / 60. And less than or equal to 1 / 50 ; The second end of the antenna is an antenna segment, and the orthographic projection of the antenna segment on the bottom of the housing is parallel to the orthographic projection of the antenna coupling segment on the bottom of the housing.

2. The antenna coupling device as described in claim 1, characterized in that, In a direction perpendicular to the plane where the bottom of the housing is located, there is a first distance between the antenna coupling ring and the bottom of the housing, and a second distance between the side of the radio frequency module away from the bottom of the housing and the bottom of the housing, wherein the first distance is greater than the second distance.

3. The antenna coupling device as described in claim 1, characterized in that, The antenna coupling loop is a closed coil, and the shape of the antenna coupling loop includes rectangular, circular, or triangular.

4. The antenna coupling device as described in claim 1, characterized in that, The antenna coupling ring is printed on the inner wall of the top of the housing; Alternatively, the antenna coupling ring is attached to the inner wall of the top of the housing; Alternatively, the antenna coupling ring is engraved on the inner wall of the top of the housing.

5. The antenna coupling device as described in claim 1, characterized in that, The antenna includes a PCB antenna, an SMT patch antenna, a ceramic antenna, a metal wire antenna, or a metal stamping antenna. The material of the antenna coupling coil includes conductive metal or conductive non-metal; The insulating housing is made of materials including polyester, polyimide, ABS engineering plastic, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, epoxy resin, or glass.

6. An electronic device comprising the antenna coupling device according to any one of claims 1-5.

Images