US-12627320-B2 - Electronic device and antenna structure

Abstract

Embodiments of the present application provide an electronic device for wireless communication. An example electronic device includes a low-frequency processing circuit, a high-frequency processing circuit, a coil, and at least one capacitor. The low-frequency processing circuit is electrically connected to two ends of the coil. The high-frequency processing circuit is electrically connected to the two ends of the coil. Each of the at least one capacitor is connected in parallel to the coil.

Inventors

• Qiang Wang
• Hanyang Wang
• Chen Zhang
• Chengcheng Nie
• Xiaofeng Li

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260512

Application Date

20210707

Priority Date

20200716

Claims (20)

1. 1 . An electronic device, comprising: a low-frequency processing circuit, a high-frequency processing circuit, a coil, and at least one capacitor, wherein the low-frequency processing circuit is electrically connected to two ends of the coil; the high-frequency processing circuit is electrically connected to the two ends of the coil; and each of the at least one capacitor is connected in parallel to the coil, wherein a first end of each of the at least one capacitor and a second end of each of the at least one capacitor are connected to the coil, wherein the first end of each of the at least one capacitor is electrically connected to the coil at an outermost ring of the coil, and the second end of each of the at least one capacitor is electrically connected to the coil at an innermost ring of the coil.
2. 2 . The electronic device according to claim 1 , wherein the electronic device further comprises: a first low-pass filter, a second low-pass filter, a first high-pass filter, and a second high-pass filter, wherein the first low-pass filter and the second low-pass filter are respectively arranged between the low-frequency processing circuit and the two ends of the coil, the first low-pass filter is electrically connected to the low-frequency processing circuit and the coil, and the second low-pass filter is electrically connected to the low-frequency processing circuit and the coil; and the first high-pass filter and the second high-pass filter are respectively arranged between the high-frequency processing circuit and the two ends of the coil, the first high-pass filter is electrically connected to the high-frequency processing circuit and the coil, and the second high-pass filter is electrically connected to the high-frequency processing circuit and the coil.
3. 3 . The electronic device according to claim 2 , wherein the low-frequency processing circuit is configured to process an electrical signal for wireless charging.
4. 4 . The electronic device according to claim 3 , wherein the high-frequency processing circuit is configured to process an electrical signal for data transmission.
5. 5 . The electronic device according to claim 2 , wherein the low-frequency processing circuit is configured to process an electrical signal for near field communication (NFC).
6. 6 . The electronic device according to claim 5 , wherein the high-frequency processing circuit is configured to process an electrical signal for a wireless fidelity (Wi-Fi) frequency band.
7. 7 . The electronic device according to claim 1 , wherein a capacitance value of each of the at least one capacitor is between 0.5 pF and 5 pF.
8. 8 . The electronic device according to claim 7 , wherein a capacitance value of each of the at least one capacitor is 1 pF.
9. 9 . The electronic device according to claim 1 , wherein each of the at least one capacitor is a distributed capacitor or a lumped capacitor.
10. 10 . The electronic device according to claim 1 , wherein the electronic device further comprises: a first antenna unit, wherein an operating frequency band of the first antenna unit covers at least one frequency band in a cellular network.
11. 11 . The electronic device according to claim 1 , wherein the electronic device further comprises: a second antenna unit, wherein an operating frequency band of the second antenna unit covers a Wi-Fi frequency band.
12. 12 . The electronic device according to claim 1 , wherein a plane size of the coil is less than or equal to 80 mm×80 mm.
13. 13 . A communications system, comprising: a base station, configured to transmit a signal; and an electronic device, configured to receive the signal from the base station, wherein the electronic device comprises: a low-frequency processing circuit, a high-frequency processing circuit, a coil, and at least one capacitor, wherein the low-frequency processing circuit is electrically connected to two ends of the coil; the high-frequency processing circuit is electrically connected to the two ends of the coil; and each of the at least one capacitor is connected in parallel to the coil, wherein a first end of each of the at least one capacitor and a second end of each of the at least one capacitor are connected to the coil, wherein the first end of each of the at least one capacitor is electrically connected to the coil at an outermost ring of the coil, and the second end of each of the at least one capacitor is electrically connected to the coil at an innermost ring of the coil.
14. 14 . The communications system according to claim 13 , wherein the electronic device further comprises: a first low-pass filter, a second low-pass filter, a first high-pass filter, and a second high-pass filter, wherein the first low-pass filter and the second low-pass filter are respectively arranged between the low-frequency processing circuit and the two ends of the coil, the first low-pass filter is electrically connected to the low-frequency processing circuit and the coil, and the second low-pass filter is electrically connected to the low-frequency processing circuit and the coil; and the first high-pass filter and the second high-pass filter are respectively arranged between the high-frequency processing circuit and the two ends of the coil, the first high-pass filter is electrically connected to the high-frequency processing circuit and the coil, and the second high-pass filter is electrically connected to the high-frequency processing circuit and the coil.
15. 15 . The communications system according to claim 14 , wherein the low-frequency processing circuit is configured to process an electrical signal for wireless charging.
16. 16 . The communications system according to claim 15 , wherein the high-frequency processing circuit is configured to process an electrical signal for data transmission.
17. 17 . The communications system according to claim 14 , wherein the low-frequency processing circuit is configured to process an electrical signal for near field communication (NFC).
18. 18 . The communications system according to claim 17 , wherein the high-frequency processing circuit is configured to process an electrical signal for a wireless fidelity (Wi-Fi) frequency band.
19. 19 . The communications system according to claim 13 , wherein a capacitance value of each of the at least one capacitor is between 0.5 pF and 5 pF.
20. 20 . The communications system according to claim 19 , wherein a capacitance value of each of the at least one capacitor is 1 pF.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a National Stage of International Patent Application No. PCT/CN2021/105035, filed on Jul. 7, 2021, which claims priority to Chinese Patent Application No. 202010684519.1, filed on Jul. 16, 2020, both of which are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of wireless communication, and in particular, to an electronic device and an antenna structure. BACKGROUND Currently, customer-premise equipment (customer premise equipment, CPE) located outdoors usually needs to transmit, to the indoors by using a power over Ethernet (power over Ethernet, PoE) network cable, a cellular network signal sent by a base station. The PoE network cable needs to pass through a window or a wall, and consequently, it is relatively difficult to arrange and route cables. When a gap of a window of a user is small or there is no hole, having been disposed on the wall, that can be borrowed, professional engineering installation and hole drilling are required, and installation costs are high. This application provides a wireless data transmission solution to replace a conventional solution in which a PoE network cable passes through a window or a wall, thereby avoiding a hole drilling step required due to a need for the cable to pass through the window and the wall, and effectively improving user experience. SUMMARY Embodiments of this application provide an electronic device and an antenna structure, to simultaneously implement low-frequency and high-frequency signal transmission on the electronic device by using an internal coil. Through multiplexing of a coil, in a CPE scenario, data transmission can be performed while the coil transmits power, which implements wireless data transmission and avoids a hole drilling step required due to a need for a cable to pass through a window and a wall. In addition, the multiplexing of the coil can effectively reduce a quantity of antennas inside the electronic device, which is conducive to miniaturization of the electronic device. According to a first aspect, an electronic device is provided, including: a low-frequency processing module, a high-frequency processing module, a coil, and at least one capacitor. The low-frequency processing module is electrically connected to two ends of the coil. The high-frequency processing module is electrically connected to the two ends of the coil. Each of the at least one capacitor is connected in parallel to the coil. It should be understood that as a quantity of capacitors connected in parallel to the coil increases, voltages between inner rings and outer rings of the coil increasingly tend to be the same, and accordingly, radiation performance of the coil is better. According to the technical solution of this embodiment of this application, by using a characteristic that the capacitor is short-circuited at a high frequency and short-circuited at a low frequency, an antenna structure including the coil and the at least one capacitor can operate at a high frequency and a low frequency at the same time. In addition, the high-frequency processing module and the low-frequency processing module respectively process signals used when the coil operates at two frequencies, so that the electronic device can simultaneously process different electrical signals, which can effectively reduce a quantity of antennas inside the electronic device, and is conducive to the miniaturization of the electronic device. With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes: a first low-pass filter, a second low-pass filter, a first high-pass filter, and a second high-pass filter. The first low-pass filter and the second low-pass filter are respectively arranged between the low-frequency processing module and the two ends of the coil. The first low-pass filter is electrically connected to the low-frequency processing module and the coil. The second low-pass filter is electrically connected to the low-frequency processing module and the coil. The first high-pass filter and the second high-pass filter are respectively arranged between the high-frequency processing module and the two ends of the coil. The first high-pass filter is electrically connected to the high-frequency processing module and the coil. The second high-pass filter is electrically connected to the high-frequency processing module and the coil. According to the technical solution of this embodiment of this application, a high-frequency channel and a low-frequency channel can be distinguished through a high-pass filter and a low-pass filter. When the antenna structure including the coil and the at least one capacitor operates in a low-frequency mode, a high-pass filter is arranged between the antenna structure and the high-frequency processing module, and the antenna structure is open-circuited at a low frequency, which can prevent a