Electronic device

Patent metadata

Field	Value
Publication number	US-2022013907-A1
Application number	US-202117204205-A
Country	US
Kind code	A1
Filing date	Mar 17, 2021
Priority date	Jul 8, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present disclosure provides an electronic device including a metal housing and a plurality of antennas operating at different frequency bands. A frame of the metal housing is provided with at least one gap, each frame segment of frame segments on both sides of each gap is configured as a radiation structure shared by at least one antenna. Each antenna includes a signal circuit and a matching circuit, the matching circuit is coupled in series between the signal circuit of the antenna where the matching circuit is located and the radiation structure, and configured to output a signal matching with an operating frequency band of the antenna where the matching circuit is located and filter out signals that are coupled from other antennas of the gap and match with operating frequency bands of other antennas of the gap.

First claim

What is claimed is:

1 . An electronic device, comprising
a metal housing, and a plurality of antennas operating at different frequency bands, wherein a frame of the metal housing is provided with at least one gap, each frame segment of frame segments on both sides of each gap is configured as a radiation structure shared by at least one antenna, each antenna comprising a signal circuit and a matching circuit, and wherein the matching circuit is coupled in series between the signal circuit of the antenna where the matching circuit is located and the radiation structure, and configured to output a signal matching with an operating frequency band of the antenna where the matching circuit is located and filter out signals that are coupled from other antennas of the gap and match with operating frequency bands of other antennas of the gap.

2 . The electronic device according to claim 1 , wherein the matching circuit of each antenna is elastically contacted with an electrical contact point on the frame through an elastic sheet, to enable the signal circuit to form an electrical connection with the corresponding frame segment.

3 . The electronic device according to claim 1 , wherein the plurality of antennas comprises a first antenna, the matching circuit of the first antenna comprising a first inductor, a second inductor, a first capacitor and a second capacitor; wherein the first inductor is coupled in series between a first terminal of the matching circuit of the first antenna and ground; the second capacitor is coupled in series between a second terminal of the matching circuit of the first antenna and the ground; the first capacitor is coupled in series between the first terminal of the matching circuit of the first antenna and one terminal of the second inductor, and the other terminal of the second inductor is electrically coupled to the second terminal of the matching circuit of the first antenna.

4 . The electronic device according to claim 3 , wherein an inductance value of the second inductor is greater than a preset first inductance value, and a capacitance value of the second capacitor is greater than a preset first capacitance value.

5 . The electronic device according to claim 3 , wherein the plurality of antennas further comprises a second antenna, the second antenna and the first antenna are respectively provided on both sides of the same gap, and an operating frequency of the second antenna is greater than an operating frequency of the first antenna,
the matching circuit of the second antenna comprises a third inductor, a fourth inductor, a third capacitor and a fourth capacitor; the third inductor is coupled in series between the first terminal of the matching circuit of the second antenna and the ground; the fourth capacitor is coupled in series between the second terminal of the matching circuit of the second antenna and the ground; the third capacitor is coupled in series between the first terminal of the matching circuit of the second antenna and one terminal of the fourth inductor, and the other terminal of the fourth inductor is electrically coupled to the second terminal of the matching circuit of the second antenna.

6 . The electronic device according to claim 5 , wherein an inductance value of the third inductor is less than a preset second inductance value, and a capacitance value of the third capacitor is less than a preset second capacitance value.

7 . The electronic device according to claim 5 , wherein each of the first antenna and the second antenna comprises a filter circuit, the filter circuit is coupled in series between the matching circuit and the signal circuit of the antenna where the filter circuit is located, and configured to filter out signals that are coupled from antennas on the other side of the same gap and match with operating frequency bands of antennas on the other side of the same gap and signals that match with operating frequency bands of other antennas on the same side with the antenna where the filter circuit is located.

8 . The electronic device according to claim 7 , wherein the filter circuit of the first antenna is implemented by a band-pass filter circuit, the filter circuit of the second antenna is implemented by a band-stop filter circuit, and an operating frequency band that the band-pass filter circuit allows signals to pass is overlapped with an operating frequency band that the band-stop filter circuit forbids signals to pass.

9 . The electronic device according to claim 8 , wherein the band-stop filter circuit is implemented by a parallel LC resonant circuit; and the band-pass filter circuit is implemented by a series LC resonant circuit.

10 . The electronic device according to claim 3 , wherein, the plurality of antennas further comprises a third antenna sharing the radiation structure with the first antenna,
the third antenna operating at a third frequency band, and a frequency of the third frequency band is less than a frequency of the first frequency band; the first antenna further comprising a capacitor with a capacitance value less than a preset third capacitance value or a preset LC resonant circuit, the capacitor or the LC resonant circuit is coupled in series between the radiation structure and the matching circuit, and configured to filter out signals outside the first frequency band; and the third antenna further comprising an inductor with an inductance value greater than a preset third inductance value, the inductor is coupled in series between the radiation structure and the matching circuit, and configured to filter out signals outside the third frequency band.

11 . The electronic device according to claim 10 , wherein the first antenna and the third antenna are configured to be not provided with a matching circuit in parallel form or a filter circuit in parallel form.

12 . The electronic device according to claim 1 , wherein
the signal circuit is configured to provide a source signal, the source signal is passed through the matching circuit and then forms an electromagnetic signal to radiate into space through the radiation structure; or the radiation structure is configured to receive the electromagnetic signal in the space to obtain an electrical signal, and the signal circuit is configured to receive an electrical signal matched by the matching circuit and process the received electrical signal to obtain a signal contained in the electromagnetic signal.

13 . The electronic device according to claim 2 , wherein the number of the electrical contact points on each frame segment is the same with the number of antennas sharing the frame segment as the radiation structure.

14 . The electronic device according to claim 3 , wherein the first antenna operates at the following frequency bands: B1/3/7 (1710 MHz˜2690 MHz), or GPS (1575.42 MHz)+2.4G WiFi (2.4 GHz˜2.5 GHz).

15 . The electronic device according to claim 5 , wherein the second antenna operates at the following frequency bands: N78 (3300 MHz˜3800 MHz), N79 (4400 MHz˜4900 MHz) or WiFi 5G (550 MHz˜850 MHz).

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Sha Shaoshu
• Wu Qing

Classifications

• H01Q21/00

  Antenna arrays or systems (arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00) · CPC title

• H01Q1/22

  by structural association with other equipment or articles · CPC title

• H01Q1/44 Primary

  using equipment having another main function to serve additionally as an antenna {, e.g. means for giving an antenna an aesthetic aspect}(H01Q1/27 - H01Q1/34 take precedence) · CPC title

• H01Q23/00

  Antennas with active circuits or circuit elements integrated within them or attached to them · CPC title

• H04B1/40

  Circuits · CPC title