Antenna and Mobile Terminal

Patent metadata

Field	Value
Publication number	US-2016336649-A1
Application number	US-201515112635-A
Country	US
Kind code	A1
Filing date	Feb 6, 2015
Priority date	Feb 12, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

An antenna-includes a first radiator and a first capacitor structure. A first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by means of the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of the printed circuit board. The first radiator, the first capacitor structure, the signal feed end, and the ground end form a first antenna configured to produce a first resonance frequency. An electrical length of the first radiator is greater than one eighth of a wavelength corresponding to the first resonance frequency, and the electrical length of the first radiator is less than a quarter of the wavelength corresponding to the first resonance frequency.

First claim

1 - 15 . (canceled)

16 . An antenna, comprising:
a first radiator; and a first capacitor structure; wherein a first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of the printed circuit board; wherein the first radiator, the first capacitor structure, the signal feed end, and the ground end form a first antenna configured to produce a first resonance frequency; and wherein an electrical length of the first radiator is greater than one eighth of a wavelength corresponding to the first resonance frequency, and the electrical length of the first radiator is less than a quarter of the wavelength corresponding to the first resonance frequency.

17 . The antenna according to claim 16 , wherein the second end of the first radiator is electrically connected to the ground end of the printed circuit board by a second capacitor structure.

18 . The antenna according to claim 17 , wherein the second capacitor structure comprises an E-shape component and a U-shape component;
wherein the E-shape component comprises a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected to two ends of the fourth branch, the second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, there is a first gap formed between the first branch and the second branch, and there is a second gap formed between the second branch and the third branch; and wherein the U-shape component comprises two branches, wherein the two branches of the U-shape component are separately located in the first gap and the second gap of the E-shape component, and the E-shape component and the U-shape component do not contact each other.

19 . The antenna according to claim 16 , further comprising a second radiator, wherein a first end of the second radiator is electrically connected to the first end of the first radiator, and the second radiator, the first capacitor structure, and the signal feed end form a second antenna configured to produce a second resonance frequency.

20 . The antenna according to claim 19 , wherein the second radiator is located on an extension cord of the first radiator.

21 . The antenna according to claim 19 , further comprising a parasitic branch, wherein one end of the parasitic branch is electrically connected to the ground end of the printed circuit board, and another end of the parasitic branch and a second end of the second radiator are opposite to each other across a gap and do not contact each other, the another end of the parasitic branch and the second end of the second radiator being configured to form coupling and to produce a third resonance frequency.

22 . The antenna according to claim 16 , wherein the first capacitor structure comprises an E-shape component and a U-shape component;
wherein the E-shape component comprises a first branch, a second branch, a third branch, and a fourth branch, wherein the first branch and the third branch are connected to two ends of the fourth branch, the second branch is located between the first branch and the third branch, the second branch is connected to the fourth branch, there is a first gap formed between the first branch and the second branch, and there is a second gap formed between the second branch and the third branch; and wherein the U-shape component comprises two branches, wherein the two branches of the U-shape component are separately located in the first gap and the second gap of the E-shape component, and the E-shape component and the U-shape component do not contact each other.

23 . The antenna according to claim 22 , wherein the first end of the first radiator is connected to the first branch of the first capacitor structure.

24 . The antenna according to claim 22 , wherein the first end of the first radiator is connected to the fourth branch of the first capacitor structure.

25 . The antenna according to claim 22 , wherein a first end of a second radiator is connected to the third branch of the first capacitor structure.

26 . The antenna according to claim 16 , wherein the first radiator is located on an antenna support, and a vertical distance between a plane on which the first radiator is located and a plane on which the printed circuit board is located is between 2 millimeters and 6 millimeters.

27 . A mobile terminal, comprising:
a radio frequency processing unit; a baseband processing unit; and an antenna; wherein the antenna comprises a first radiator and a first capacitor structure; wherein a first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of a printed circuit board; wherein the first radiator, the first capacitor structure, the signal feed end, and the ground end form a first antenna configured to produce a first resonance frequency; wherein an electrical length of the first radiator is greater than one eighth of a wavelength corresponding to the first resonance frequency, and the electrical length of the first radiator is less than a quarter of the wavelength corresponding to the first resonance frequency; wherein the radio frequency processing unit is connected to the signal feed end of the printed circuit board by a matching circuit; wherein the antenna is configured to transmit a received radio signal to the radio frequency processing unit, or convert a transmit signal of the radio frequency processing unit into an electromagnetic wave and send the electromagnetic wave; wherein the radio frequency processing unit is configured to:
perform frequency-selective, amplifying, and down-conversion processing on the radio signal received by the antenna, and convert the processed radio signal into an intermediate frequency signal or a baseband signal and send the intermediate frequency signal or the baseband signal to the baseband processing unit; or
send, by means of the antenna and by means of up-conversion and amplifying, a baseband signal or an intermediate frequency signal sent by the baseband processing unit; and
wherein the baseband processing unit is configured to process the received intermediate frequency signal or baseband signal.

28 . The mobile terminal according to claim 27 , wherein the second end of the first radiator is electrically connected to the ground end of the printed circuit board by a second capacitor structure.

29 . The mobile terminal according to claim 27 , wherein the antenna further comprises a second radiator;
wherein a first end of the second radiator is electrically connected to the first end of the first radiator, and the second radiator, the first capacitor structure, and the signal feed end form a second antenna configured to produce a second resonance frequency.

30 . The mobile terminal according to claim 29 , wherein the antenna further comprises a parasitic branch, wherein one end of the parasitic branch is electrically connected to the ground end of the printed circuit board, and another end of the parasitic branch and a second end of the second radiator are opposite to each other across a gap and do not contact each other, wherein the another end of the parasitic branch and the second end of the second radiator are configured to form coupling and to produce a third resonance frequency.

31 . The mob

Assignees

• Huawei Device Co Ltd

Inventors

• Yu Dong
• Wang Hanyang
• Li Jianming

Classifications

• H01Q5/335

  at the feed, e.g. for impedance matching · CPC title

• H01Q7/00

  Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop · CPC title

• H01Q5/378

  Combination of fed elements with parasitic elements · CPC title

• H01Q1/38 Primary

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q9/42

  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength · CPC title