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EP-4145624-B1 - ANTENNA AND ELECTRONIC DEVICE

EP4145624B1EP 4145624 B1EP4145624 B1EP 4145624B1EP-4145624-B1

Inventors

  • Zhang, Junhong
  • LAN, Yao
  • LI, JUN
  • ZHOU, YUAN

Dates

Publication Date
20260506
Application Date
20210316

Claims (13)

  1. An antenna (17, 25, 30), comprising: a radiator (310), a first feed point (301) and a second feed point (302) that are disposed on the radiator (310), wherein one end of the radiator (310) is an open end (303), and the first feed point (301) is located between the open end (303) and the second feed point (302); the radiator (310) comprises a first position and a second position, wherein a distance between the first position and the open end (303) along the radiator (310) is a quarter of a target wavelength, and a distance between the second position and the first feed point (301) along the radiator (310) is a half of the target wavelength; the first feed point (301) is disposed at a position that deviates from the first position by a first preset value, and the first preset value is greater than or equal to 0, and less than or equal to one sixteenth of the target wavelength; and the second feed point (302) is disposed at a position that deviates from the second position by a second preset value, and the second preset value is greater than or equal to 0, and less than or equal to one sixteenth of the target wavelength, wherein the radiator (310) further comprises a third position, a distance between the third position and the second feed point (302) along the radiator (310) is a quarter of the target wavelength, and wherein the radiator (310) comprises at least one bent portion, characterised in that a first bent portion (305) of the at least one bent portion is disposed at a position that deviates from the third position by a third preset value, and the third preset value is greater than or equal to 0, and is less than or equal to one eighth of the target wavelength.
  2. The antenna (17, 25, 30) according to claim 1, wherein a distance between the second feed point (302) and the other end of the radiator (310) along the radiator (310) is greater than or equal to 0, and is less than or equal to one eighth of the target wavelength.
  3. The antenna (17, 25, 30) according to claim 1 or 2, wherein when a first signal is fed at the first feed point (301), the radiator (310) between the open end (303) and the first feed point (301) is a radiation source; and/or when a second signal is fed at the second feed point (302), the radiator (310) is a radiation source.
  4. The antenna (17, 25, 30) according to any one of claims 1 to 3, wherein when the first signal is fed at the first feed point (301), a first current is distributed on the radiator (310) between the open end (303) and the first feed point (301), and the first current on the radiator (310) between the open end (303) and the first feed point (301) flows in a same direction; and when the second signal is fed at the second feed point (302), a second current is distributed on the radiator (310), wherein the second current on the radiator (310) on two sides of the first feed point (301) flows in a same direction, and the flow direction of the second current on the radiator (310) is reversed at a position between the first feed point (301) and the second feed point (302).
  5. The antenna (17, 25, 30) according to any one of claims 1 to 4, wherein a bending angle of the radiator (310) on the at least one bent portion is 90° or 180°.
  6. The antenna (17, 25, 30) according to any one of claims 1 to 5, wherein a second bent portion (306) of the at least one bent portion is disposed at a position that deviates from the first feed point (301) by a fourth preset value, and the fourth preset value is greater than or equal to 0, and is less than or equal to one eighth of the target wavelength.
  7. The antenna (17, 25, 30) according to any one of claims 1 to 6, wherein the radiator (310) between the open end (303) and the first feed point (301) is in a closed ring shape.
  8. The antenna (17, 25, 30) according to any one of claims 1 to 7, wherein a range of a distance between the open end (303) of the radiator (310) and the other end of the radiator (310) along the radiator (310) is [L-a, L+a], L is equal to three quarters of the target wavelength, and a is greater than or equal to 0, and less than or equal to one sixteenth of the target wavelength.
  9. The antenna (17, 25, 30) according to any one of claims 1 to 8, wherein the first feed point (301) is configured to feed a first signal, and the second feed point (302) is configured to feed a second signal, the first signal and the second signal are independent of each other, wherein, an operating band of the antenna (17, 25, 30) when the first feed point (301) is feeding, and an operating band of the antenna (17, 25, 30) when the second feed point (302) is feeding, are at least partially the same, and wherein the target wavelength is an operating wavelength of the antenna (17, 25, 30) when the antenna (17, 25, 30) is operating in the at least partially the same operating bands.
  10. An electronic device (100, 200), comprising the antenna (17, 25, 30) according to any one of claims 1 to 9.
  11. The electronic device (100, 200) according to claim 10, wherein the electronic device (100, 200) comprises a metal bezel or a metal housing, and the radiator (310) of the antenna (17, 25, 30) is a part of the metal bezel or a part of the metal housing of the electronic device (100, 200); or the electronic device (100, 200) comprises an insulation bezel or an insulation housing, and the radiator (310) of the antenna (17, 25, 30) is disposed on the insulation bezel or the insulation housing; or the electronic device (100, 200) comprises an insulation support or a dielectric substrate (40), and the radiator (310) of the antenna (17, 25, 30) is disposed on the insulation support or the dielectric substrate (40).
  12. The electronic device (100, 200) according to claim 11, wherein the part of the metal bezel is the metal bezel located at a bottom of the electronic device (100, 200), or the metal bezel located at a top of the electronic device (100, 200).
  13. The electronic device (100, 200) according to any one of claims 10 to 12, wherein the electronic device (100, 200) is a wireless headset comprising a flexible printed circuit (28) corresponding to a headset handle, and the antenna is attached to the flexible printed circuit (28).

Description

This application claims priority to Chinese Patent Application No. 202010471429.4, filed with the China National Intellectual Property Administration on May 29, 2020 and entitled "ANTENNA AND ELECTRONIC DEVICE". TECHNICAL FIELD Embodiments of this application relate to the field of antenna technologies, and more specifically, to an antenna and an electronic device. BACKGROUND With development of mobile communication technologies such as a multiple-in multiple-out (multiple-in multiple-out, MIMO) technology, an increasing quantity of antennas are disposed in an electronic device, to provide better service quality for a user. However, in a limited space environment of the electronic device, if more antennas are disposed, isolation between antennas is reduced, and communication quality is affected. Therefore, how to dispose antennas with high isolation in limited space is a problem that needs to be resolved. WO 2019/127060 A1 discloses a dual-feed dual-band multiple-input and multiple-output (MIMO) antenna apparatus including an antenna radiator, a first feed port, a second feed port, a first filter unit, and a second filter unit. The first feed port and the second feed port are spaced on the antenna radiator in a length direction of the antenna radiator. The first filter unit is disposed between the first feed port and the antenna radiator, and the second filter unit is disposed between the second feed port and the antenna radiator. The first filter unit is configured to pass a frequency component within a first preset frequency range and filter out a frequency component outside the first preset frequency range; and the second filter unit is configured to filter out a frequency component within a second preset frequency range and pass a frequency component outside the second preset frequency range. KHRAISAT YAHYA S. H. ET AL: "Analysis of the radiation Resistance and Gain of Full-Wave Dipole Antenna for Different Feeding Design", JOURNAL OF ELECTROMAGNETIC ANALYSIS AND APPLICATIONS, vol. 04, no. 06, 1 June 2012 (2012-06-01), pages 235-242, discloses antenna pattern and gain for different designs of full-wave dipole antenna feeding techniques. Seven such techniques disclosed; symmetrical dual feeding in phase, symmetrical dual feeding out of phase, asymmetrical dual feeding in phase, asymmetrical dual feeding out of phase, symmetrical triple feeding in phase and symmetrical triple feeding out of phase. All antenna designs are linear. US 2016/064818 A1 dislcoses an antenna including a second element that has an end connected to a first point of a first element, and first and second ends kept open, and includes a first portion extending from a feed terminal to the first end, and a second portion extending from the feed terminal and bifurcated at a second point between the first point and the first end. The lengths of the first and second portions are set to substantially ¼ of a resonance frequency, and substantially ¾ of a resonance frequency, severally. The second portion includes a portion extending from the feed terminal to the second point, and a portion extending from the second point to the second end and interposed between the portion and a ground. US 2014/240474 A1 discloses a glasses-type radio communication device which is to be worn on the head of a user, includes: right and left eyepiece parts; and an antenna for carrying out radio communication, the antenna being a dipole antenna including an antenna element and a power feeding section which supplies electric power to the antenna element, the power feeding section being provided between the right and left eyepiece parts. SUMMARY Embodiments of this application provide an antenna according to claim 1 and an electronic device comprising the antenna according to claim 10, so that a same radiator can be disposed in limited space of the electronic device to implement two antenna modes with high isolation, thereby saving space of the electronic device. According to a first aspect, an antenna is provided, including: a radiator, and a first feed point and a second feed point that are disposed on the radiator. One end of the radiator is an open end, and the first feed point is located between the open end and the second feed point. The radiator includes a first position and a second position, where a distance between the first position and the open end along the radiator is a quarter of a target wavelength, and a distance between the second position and the first feed point along the radiator is a half of the target wavelength. The first feed point is disposed at a position that deviates from the first position by a first preset value, and the first preset value is greater than or equal to 0, and less than or equal to one sixteenth of the target wavelength. The second feed point is disposed at a position that deviates from the second position by a second preset value, and the second preset value is greater than or equal to 0, and less than or equal to one si