An electronic device

Abstract

The present disclosure relates to an electronic device, which comprises a feeding part, a middle frame antenna, an FPC antenna and a first tuning circuit. The feeding part is electrically connected with the middle frame antenna. The FPC antenna is electrically connected with the feeding part and the middle frame antenna through the first tuning circuit. In the present disclosure, the first tuning circuit is arranged to electrically connect the middle frame antenna and the FPC antenna. The first tuning circuit makes the FPC antenna and the middle frame antenna resonate, and the energy is guided and concentrated, so that the gain and directivity of the middle frame antenna can be enhanced, and the user experience can be improved. Compared with the related art, the structure strength and appearance of the electronic device are not sacrificed, and the direct interference to the performance of other antennas is also avoided.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and more particularly to an electronic device. Background Technology

[0002] Smartphones typically have slots in their metal frames to allow a portion of the metal to function as an antenna radiator; this is known as a "metal frame antenna" design.

[0003] In order to balance aesthetic symmetry and multi-band coverage, a common design is to use a symmetrical slit structure on the side or top of the phone frame. However, this design concept limits the radiation performance of the antenna. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides an electronic device.

[0005] According to an embodiment of this disclosure, an electronic device is provided, comprising: Power supply section; The mid-frame antenna is electrically connected to the feed section; The FPC antenna and the first tuning circuit are electrically connected between the mid-frame antenna and the FPC antenna, and the FPC antenna is electrically connected to the feed section through the first tuning circuit.

[0006] In this embodiment, by setting a first tuning circuit to electrically connect the mid-frame antenna and the FPC antenna, the first tuning circuit causes the FPC antenna and the mid-frame antenna to resonate, and the energy is guided and concentrated, which can enhance the gain and directivity of the mid-frame antenna, thereby improving the user experience. Compared with related technologies, it does not sacrifice the structural strength and aesthetics of electronic devices, and also avoids direct interference with the performance of other antennas.

[0007] In some embodiments, the electronic device includes a circuit board located between the mid-frame antenna and the FPC antenna, and the first tuning circuit is disposed on the circuit board.

[0008] In this embodiment, the first tuning circuit is placed in the circuit board, making full use of the existing structure in the electronic device without affecting the existing internal stacking of the electronic device.

[0009] In some embodiments, the electronic device includes a first electrical connection that connects the mid-frame antenna to the first tuning circuit of the circuit board.

[0010] In this embodiment, by providing a first electrical connection part, a reliable electrical connection is formed between the mid-frame antenna and the first tuning circuit.

[0011] In some embodiments, the electronic device includes a second electrical connection that connects the first tuning circuit of the circuit board to the FPC antenna.

[0012] In this embodiment, by providing a second electrical connection part, a reliable electrical connection is formed between the FPC antenna and the first tuning circuit.

[0013] In some embodiments, the first electrical connection portion and the second electrical connection portion include a power feeding spring.

[0014] In this embodiment, the feed spring is reliably abutted between the mid-frame antenna and the circuit board, or between the circuit board and the FPC antenna, by the force of the internal spring, thereby forming a stable, low-impedance electrical connection path. Furthermore, since the feed spring has elastic deformation capability, it can provide stress buffering when the electronic device is dropped or squeezed.

[0015] In some embodiments, the first tuning circuit includes a tuning capacitor with a capacitance value ranging from 3.0 pF to 7.0 pF.

[0016] In this embodiment, by setting a resonant capacitor, the resonant frequency of the antenna circuit composed of the FPC antenna and the tuning capacitor can be systematically adjusted, so that the FPC antenna can work accurately at the required frequency point.

[0017] In some implementations, the resonant frequency band of the FPC antenna is positively correlated with the capacitance value of the tuning capacitor; And / or, The resonant frequency band of the FPC antenna is negatively correlated with the radiation area of ​​the FPC antenna.

[0018] In some embodiments, the electronic device further includes a second tuning circuit disposed on the circuit board and electrically connected to the mid-frame antenna. The second tuning circuit includes any one or more combinations of capacitors, inductors, and resistors.

[0019] In some implementations, the mid-frame antenna includes a Wi-Fi 5G antenna.

[0020] In some embodiments, the electronic device further includes a switching unit, which is connected in series with the first tuning circuit; The switching unit is configured to turn on or off the electrical connection path between the mid-frame antenna and the FPC antenna.

[0021] In this embodiment, when the user uses a low channel, the second switch can disconnect the electrical connection between the mid-frame antenna and the FPC antenna, allowing the mid-frame antenna to radiate signals independently with its original high performance, thus improving the user experience.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] Figure 1 This is a schematic diagram of an electronic device according to an exemplary embodiment of the present disclosure.

[0025] Figure 2 Figure 1 A cross-sectional view along the AA direction.

[0026] Figure 3 This is a schematic diagram of an antenna circuit according to an exemplary embodiment of the present disclosure.

[0027] Figure 4 This is a simulation diagram of antenna revenue according to an exemplary embodiment of the present disclosure.

[0028] Figure 5 This is an antenna gain simulation pattern illustrated according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0030] In related technologies, to balance aesthetic symmetry and multi-band coverage, symmetrical seams are typically used on the sides or top of the phone's frame (see [reference]). Figure 1 However, this symmetrical design concept severely limits the introduction of parasitic branches. If parasitic branches are to be introduced, an additional slit needs to be made on the phone's frame, which increases costs and affects aesthetics.

[0031] In related technologies, a parallel capacitor is added to the antenna opposite the target antenna (the antenna whose performance needs to be improved). The added capacitor can improve the performance of the target antenna, but it will affect the performance of the antenna opposite. Moreover, the larger the capacitance value, the greater the impact.

[0032] To address the aforementioned technical problems, this disclosure provides an electronic device comprising a power supply unit, a mid-frame antenna, an FPC antenna, and a first tuning circuit. The power supply unit is electrically connected to the mid-frame antenna, and the FPC antenna is electrically connected to both the power supply unit and the mid-frame antenna via the first tuning circuit. In this embodiment, by electrically connecting the mid-frame antenna and the FPC antenna via the first tuning circuit, the first tuning circuit causes the FPC antenna and the mid-frame antenna to resonate, guiding and concentrating energy. This enhances the gain and directivity of the mid-frame antenna, thereby improving the user experience. Compared with related technologies, this approach does not sacrifice the structural strength and aesthetics of the electronic device and avoids direct interference with the performance of other antennas.

[0033] According to an exemplary embodiment, such as Figure 1 As shown, this embodiment provides an electronic device 100, such as a smartphone, tablet computer, laptop computer, and smart wearable device.

[0034] like Figures 1 to 3 As shown, the electronic device 100 includes a mid-frame antenna 11. The mid-frame antenna 11 is formed by creating slits in the mid-frame structure 10 of the electronic device 100, dividing the mid-frame structure 10 into several independent metal segments, one or more of which can constitute the mid-frame antenna 11. (See reference...) Figure 3 The middle frame antenna 11 is connected to the feed point and the ground point. The middle frame antenna 11 is connected to the feed section 20 through the feed point and to the ground layer in the electronic device 100 through the ground point. The feed section 20 passes current into the middle frame antenna 11 through the feed point. An alternating current is formed on the structural surface of the middle frame antenna 11 located between the feed point and the ground point. The alternating current excites an alternating magnetic field and radiates it into the external space in the form of electromagnetic waves to form an antenna signal.

[0035] like Figure 2 and Figure 3 As shown, the electronic device 100 also includes an FPC antenna 30. The FPC antenna 30 is an antenna manufactured using the process of flexible circuit board 50. Its full name is flexible printed circuit board antenna, which has the characteristics of being thin, flexible, and having a high degree of freedom in shape.

[0036] See Figure 2 and Figure 3 The FPC antenna 30 is electrically connected to the mid-frame antenna 11 through the first tuning circuit 40. It can be understood that this arrangement also enables the FPC antenna 30 to be electrically connected to the feed unit 20, so that the feed unit 20 can supply power to the FPC antenna 30, making the FPC antenna 30 the second antenna in the antenna system where the mid-frame antenna 11 is located. The introduction of the FPC antenna 30 increases the total radiation area of ​​the antenna system and can improve the radiation performance of the antenna system.

[0037] The first tuning circuit 40 is configured to adjust the operating frequency band of the FPC antenna 30 so that the operating frequency band of the FPC antenna 30 matches the operating frequency band of the mid-frame antenna 11, thereby enabling the FPC antenna 30 to work in concert with the mid-frame antenna 11 to significantly improve antenna performance.

[0038] In this embodiment, the mid-frame antenna 11 and the FPC antenna are electrically connected through the first tuning circuit. Compared with related technologies, there is no need to make structural adjustments to the existing mid-frame structure 10 of the electronic device 100. This significantly enhances the performance of the mid-frame antenna 11 without affecting the symmetrical design scheme of the gap, which is beneficial to improving the user experience.

[0039] In one exemplary embodiment, such as Figures 1 to 3 As shown, this embodiment provides an electronic device 100, which includes a power supply unit 20, a mid-frame antenna 11, an FPC antenna 30, and a first tuning circuit 40. The power supply unit 20 is electrically connected to the mid-frame antenna 11, and the FPC antenna 30 is electrically connected to the power supply unit 20 and the mid-frame antenna 11 through the first tuning circuit 40.

[0040] In some embodiments, such as Figure 2 As shown, the electronic device 100 includes a circuit board 50 located between the mid-frame antenna 11 and the FPC antenna 30. A first tuning circuit 40 is disposed on the circuit board 50. The circuit board 50 may be, for example, the motherboard of the electronic device 100, and the first tuning circuit 40 may be composed of electronic components on the motherboard and traces in the motherboard.

[0041] In some embodiments, see Figure 2 The electronic device 100 includes a first electrical connection portion 60, which is disposed on the side of the circuit board 50 facing the mid-frame antenna 11. The first electrical connection portion 60 is used to electrically connect the mid-frame antenna 11 and the first tuning circuit 40. For example, the first electrical connection portion 60 can be a feed spring, which is a miniature elastic metal component used to realize the electrical connection between the circuit board 50 and the antenna radiator. In the assembled state, the feed spring reliably abuts against the mid-frame antenna 11 and the circuit board 50 by the force of the internal spring, thereby forming a stable, low-impedance electrical connection path. Furthermore, since the feed spring has elastic deformation capability, it can provide stress buffering when the electronic device 100 is dropped or squeezed, which has higher reliability than the hard connection formed by welding, and is easier to assemble and maintain.

[0042] In other embodiments, see Figure 2The electronic device 100 also includes a second electrical connection portion 70, which is disposed on the side of the circuit board 50 facing the FPC antenna 30. The second electrical connection portion 70 is used to electrically connect the FPC antenna 30 and the first tuning circuit 40. The second electrical connection portion 70 may also be configured as a feed spring, which will not be described in detail here.

[0043] In some other embodiments, see [reference] Figure 2 The circuit board 50 has a first electrical connection portion 60 and a second electrical connection portion 70 on both sides along its thickness direction. The mid-frame antenna 11 is electrically connected to the FPC antenna 30 via the first electrical connection portion 60, the first tuning circuit 40 in the circuit board 50, and the second electrical connection portion 70. In this embodiment, the operating frequency band of the FPC antenna 30 can be adjusted by adjusting its radiation area to match the operating frequency band of the mid-frame antenna 11. The operating frequency band (i.e., the resonant frequency band) of the FPC antenna 30 is negatively correlated with its radiation area.

[0044] In one exemplary embodiment, such as Figure 1 As shown, this embodiment provides an electronic device 100, which includes a power supply unit 20, a mid-frame antenna 11, an FPC antenna 30, and a first tuning circuit 40. The power supply unit 20 is electrically connected to the mid-frame antenna 11, and the FPC antenna 30 is electrically connected to the power supply unit 20 and the mid-frame antenna 11 through the first tuning circuit 40.

[0045] The electronic device 100 provided in this embodiment may include any structure or device of the electronic device 100 provided in the foregoing embodiments.

[0046] In this embodiment, as Figure 2 and Figure 3 The first tuning circuit 40 includes a tuning capacitor 80. The FPC antenna 30 can be equivalently represented as a resonant circuit composed of an inductor and a capacitor. Based on the resonant frequency formula, the resonant frequency (i.e., the operating frequency band) of the FPC antenna 30 can be changed simply by changing the capacitor. By setting the resonant capacitor, the resonant frequency of the antenna circuit composed of the FPC antenna 30 and the tuning capacitor 80 can be systematically adjusted, so that the FPC antenna 30 can operate precisely at the desired frequency.

[0047] In one embodiment, the tuning capacitor 80 is a fixed capacitor. In this embodiment, for example, the tuning capacitor 80 can be assigned a specific capacitance value according to the frequency band of the open channel. The capacitance value can be any value from 3.0 pF to 7.0 pF. For example, the mid-frame antenna 11 is a Wi-Fi 5G antenna. The open and available channels in China are such as channels 149 and 157. Channels 149 and 157 both belong to 5.8 GHz. Therefore, the capacitance value of the tuning capacitor 80 can be set to 5.6 pF, so that the radiation frequency band of the FPC antenna 30 is approximately 5.8 GHz. Thus, the FPC antenna 30 can provide reinforcement for the radiation performance of the mid-frame antenna 11 at 5.8 GHz, improving the user experience when connecting to and using Wi-Fi 5G.

[0048] In another embodiment, the tuning capacitor 80 is an adjustable capacitor. When the user changes the frequency band of the mid-frame antenna 11, the capacitance value of the tuning capacitor 80 can be adjusted to match the resonant frequency band of the FPC antenna 30 with the frequency band currently used by the user.

[0049] Additionally, it should be noted that the capacitance value of the tuning capacitor 80 and the radiating area of ​​the FPC antenna 30 can be adjusted simultaneously to regulate the resonant frequency band of the FPC antenna 30. For example, since the resonant frequency band of the FPC antenna 30 is negatively correlated with its radiating area, for instance, when a smaller radiating area FPC antenna 30 is selected to optimize the spatial stacking layout within the electronic device 100, the smaller radiating area will lead to an increase in the resonant frequency band of the FPC antenna 30. Therefore, the capacitance value of the tuning capacitor 80 can be appropriately reduced to lower the resonant frequency band of the FPC antenna 30 to fall within the target frequency band, achieving excellent synergistic working effect.

[0050] In some embodiments, such as Figure 3 As shown, the electronic device 100 also includes a second tuning circuit 90, which is disposed on the circuit board 50. The second tuning circuit 90 includes any one or more combinations of capacitors, inductors and resistors.

[0051] See Figure 3 The second tuning circuit 90 is located between the feed section 20 and the mid-frame antenna 11. It is used to precisely tune the operating frequency band (such as the N77 band) and status (such as the high / low channel switching of Wi-Fi 5G) of the mid-frame antenna itself. Its circuit structure mainly includes a main circuit and multiple parallel branches. Multi-band matching is achieved by configuring different inductor (L), capacitor (C) elements and switches (such as the first switch 96) in the circuit.

[0052] In one example, a first capacitor 91 (2.0pF) is provided on the main circuit of the second tuning circuit 90. Multiple branches include a first branch and a second branch. The first branch is connected in parallel with the first capacitor 91. A first inductor 92 (2.0nH) is provided on the first branch. One end of the second branch is connected to the main circuit, and the connection position is located between the first capacitor 91 and the mid-frame antenna 11. The other end of the second branch is grounded. A second inductor 93 (2.0nH) is provided on the second branch. The first capacitor 91, the first inductor 92 and the second inductor 93 work together to tune the N77 frequency band.

[0053] In another example, multiple branches include a third branch and a fourth branch. One end of the third and fourth branches is connected to the main line, with the connection point between the first capacitor 91 and the feed section 20. The other ends of the third and fourth branches are both grounded. The third branch has a second capacitor 94 (0.4pF), and the fourth branch has a third capacitor 95 (0.4pF) and a first switch 96. The second capacitor 94 is used to tune Wi-Fi 5G, and the third capacitor 95 is used to tune the low-frequency Wi-Fi 5G channel (e.g., 5.1GHz). The first switch 96 can switch between on and off states to control the mid-frame antenna 11 to switch between the high and low frequencies of Wi-Fi 5G. A first resistor 97 is provided between the first capacitor 91 and the feed section 20 on the main line.

[0054] In some embodiments, such as Figure 3 As shown, the electronic device 100 also includes a switch unit (second switch, not shown in the figure). The second switch is connected in series with the first tuning circuit 40. The second switch can control the electrical connection path between the mid-frame antenna 11 and the FPC antenna 30 to be in a conducting or turning-off state.

[0055] For example, see Figure 4The diagram shows the antenna gain simulation. The horizontal axis represents the antenna frequency band (GHz), and the vertical axis represents the radiated frequency (dB). Point 5 in the diagram has coordinates (5.15, -5.37252), indicating that when the FPC antenna 30 is not working in conjunction with the mid-frame antenna 11, the mid-frame antenna 11's frequency value at 5.15 GHz is -5.37252 dB. Point 1 has coordinates (5.15, -5.677369), indicating that when the FPC antenna 30 and the mid-frame antenna 11 work together, the mid-frame antenna 11's frequency value at 5.15 GHz is -5.677369 dB. This suggests that when a user uses a low channel (e.g., 5.15 GHz), the coordinated operation of the FPC antenna 30 and the mid-frame antenna 11 leads to a slight decrease in the radiation performance of the mid-frame antenna 11. Therefore, when the electronic device 100 operates on a high Wi-Fi 5G channel (such as 5.8GHz), the second switch is closed, the FPC antenna 30 is activated and works in conjunction with the mid-frame antenna 11 to improve performance; when the electronic device 100 operates on a low channel (such as 5.1GHz / 5.15GHz), the second switch is open, the FPC antenna 30 is isolated, and the mid-frame antenna 11 works independently to avoid performance loss.

[0056] For example, see Figure 4 In the figure, point 6 has coordinates (5.85, -6.309564), indicating that when the FPC antenna 30 does not work in conjunction with the mid-frame antenna 11, the frequency value of the mid-frame antenna 11 at 5.85 GHz is -6.309564 dB. Point 2 has coordinates (5.85, -4.82495), indicating that when the FPC antenna 30 and the mid-frame antenna 11 work in conjunction, the frequency value of the mid-frame antenna 11 at 5.85 GHz is -4.82495 dB. The electronic device 100 provided in this embodiment improves the high-channel frequency band of Wi-Fi 5G by more than 1 dB (approximately 1.5 dB), significantly enhancing the user experience.

[0057] Furthermore, see Figure 5 For the antenna gain simulation pattern, by Figure 5 It can be seen that by setting the first tuning circuit 40 and the FPC antenna 30, the concave point of the radiation pattern of the mid-frame antenna 11 between 0° and 30° can be improved, so that the mid-frame antenna 11 has excellent radiation performance in all directions, which greatly improves the user experience.

[0058] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0059] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An electronic device, characterized in that, include: Power supply section; The mid-frame antenna is electrically connected to the feed section; The FPC antenna and the first tuning circuit are electrically connected between the mid-frame antenna and the FPC antenna, and the FPC antenna is electrically connected to the feed section through the first tuning circuit.

2. The electronic device according to claim 1, characterized in that, The electronic device includes a circuit board located between the mid-frame antenna and the FPC antenna, and the first tuning circuit is disposed on the circuit board.

3. The electronic device according to claim 2, characterized in that, The electronic device includes a first electrical connection portion, which connects the mid-frame antenna to the first tuning circuit of the circuit board.

4. The electronic device according to claim 3, characterized in that, The electronic device includes a second electrical connection portion that connects the first tuning circuit of the circuit board to the FPC antenna.

5. The electronic device according to claim 4, characterized in that, The first electrical connection portion and the second electrical connection portion include a power feeding spring.

6. The electronic device according to any one of claims 1 to 5, characterized in that, The first tuning circuit includes a tuning capacitor with a capacitance value ranging from 3.0 pF to 7.0 pF.

7. The electronic device according to claim 6, characterized in that, The resonant frequency band of the FPC antenna is positively correlated with the capacitance value of the tuning capacitor; And / or, The resonant frequency band of the FPC antenna is negatively correlated with the radiation area of ​​the FPC antenna.

8. The electronic device according to any one of claims 2 to 5, characterized in that, The electronic device further includes a second tuning circuit, which is disposed on the circuit board and electrically connected to the mid-frame antenna. The second tuning circuit includes any one or more combinations of capacitors, inductors, and resistors.

9. The electronic device according to claim 1, characterized in that, The mid-frame antenna includes a Wi-Fi 5G antenna.

10. The electronic device according to claim 1, characterized in that, The electronic device further includes a switching unit, which is connected in series with the first tuning circuit. The switching unit is configured to turn on or off the electrical connection path between the mid-frame antenna and the FPC antenna.

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