Dipole antenna and wireless terminal device

• US 9,825,367 B2
• Filed: 08/29/2014
• Issued: 11/21/2017
• Est. Priority Date: 10/31/2013
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Gong, Yiwen, Wang, Kemeng, Shen, Yunpeng, Wang, Yuhui, Zhu, Dejin
• Primary Examiner(s): SMITH, GRAHAM P
• Application Number:
  US14/472,638
• Publication Number:
  US 20150116176A1
• Time in Patent Office: 1,180 Days
• Field of Search: 343821
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 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 Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/18 Vertical disposition of the antenna

Abstract

Embodiments of the present invention disclose a dipole antenna and a wireless terminal device, which relate to communications technologies and enable an antenna to have a relatively high performance and a relatively low production cost. The dipole antenna includes a first radiation arm, a second radiation arm, and a balun. The first radiation arm and the second radiation arm are both soldered on a dielectric substrate. The first radiation arm and the second radiation arm are separately connected to the balun electrically. The balun is electrically connected to a feeding point and a reference ground separately. The present invention may be applied to a terminal device.

Claims

1. A dipole antenna, comprising:

a dielectric substrate;

a first radiation arm with a first pin disposed at a lower end of the first radiation arm, wherein the first pin is soldered onto the dielectric substrate;

a second radiation arm with a second pin disposed at a lower end of the second radiation arm, wherein the second pin is soldered onto the dielectric substrate; and

a balun, wherein the balun is separately connected to each of the first radiation arm and the second radiation arm, and wherein the balun is electrically and separately connected to a feeding point and a reference ground.

2. The dipole antenna according to claim 1, wherein the balun is disposed on the dielectric substrate.

3. The dipole antenna according to claim 2, wherein the balun is connected to the feeding point using a microstrip feeding conductor, and wherein the microstrip feeding conductor and the balun are disposed oppositely and distributed on different surfaces of the dielectric substrate.

4. The dipole antenna according to claim 1, wherein the dielectric substrate comprises a first through hole and a second through hole from a top surface to an opposite surface of the dielectric substrate, and wherein the first pin traverses the first through hole and is soldered to the opposite surface of the dielectric substrate, and wherein the second pin traverses the second through hole and is soldered to the opposite surface of the dielectric substrate.

5. The dipole antenna according to claim 1, wherein each of the lower ends of the first radiation arm and the second radiation arm are separately connected to the balun electrically.

6. The dipole antenna according to claim 1, wherein the balun comprises a first conductor and a second conductor, and wherein the first conductor has one end connected to the lower end of the first radiation arm and another end connected to the reference ground, and wherein the second conductor has one end connected to the lower end of the second radiation arm and another end connected to the reference ground.

7. The dipole antenna according to claim 6, wherein the balun is connected to the feeding point using a microstrip feeding conductor, and wherein the microstrip feeding conductor comprises a first feeding conductor, and wherein the first feeding conductor is parallel with and opposite to the first conductor, and wherein the first feeding conductor has one end connected to the feeding point and another end electrically connected to the second pin.

8. The dipole antenna according to claim 7, wherein the microstrip feeding conductor further comprises a second feeding conductor, and wherein one end of the second feeding conductor is connected to one end of the first feeding conductor away from the feeding point and another end of the second feeding conductor is connected to the second pin.

9. The dipole antenna according to claim 8, wherein the first conductor and the first feeding conductor have a same dimension.

10. The dipole antenna according to claim 6, wherein the balun further comprises a third conductor, and wherein the third conductor is connected between one end of the first conductor adjacent to the reference ground and one end of the second conductor adjacent to the reference ground, and wherein the third conductor is electrically connected to the reference ground.

11. The dipole antenna according to claim 10, wherein a sum of lengths of the first conductor, the second conductor, and the third conductor is a quarter of an electromagnetic wavelength, and wherein the electromagnetic wavelength is an electromagnetic wavelength of a resonance frequency of the dipole antenna.

12. The dipole antenna according to claim 6, wherein the first conductor and the second conductor are disposed independently of each other on the dielectric substrate.

13. The dipole antenna according to claim 12, wherein one end of each of the first conductor and the second conductor adjacent the reference ground is disposed with a third pin, and wherein the third pin is soldered on the dielectric substrate and is electrically connected to the reference ground.

14. The dipole antenna according to claim 13, wherein the dielectric substrate is provided with a third through hole, and wherein the third pin extends out of the third through hole and is soldered to the dielectric substrate.

15. The dipole antenna according to claim 12, wherein a sum of a length of the first conductor, a length of the second conductor, and a distance between a ground end of the first conductor and a ground end of the second conductor is a quarter of an electromagnetic wavelength, and wherein the electromagnetic wavelength is an electromagnetic wavelength of a resonance frequency of the dipole antenna.

16. The dipole antenna according to claim 1, wherein the dielectric substrate is a printed circuit board (PCB).

17. The dipole antenna according to claim 16, wherein the PCB comprises a clearance area, and wherein the clearance area is disposed with the first radiation arm, the second radiation arm, and the balun, and wherein the feeding point and the reference ground are disposed outside the clearance area on the PCB.

18. The dipole antenna according to claim 10, wherein each of the first radiation arm, the second radiation arm, the first conductor, the second conductor, and the third conductor are integrally formed.

19. The dipole antenna according to claim 1, wherein the dipole antenna is configured to be coupled to a wireless terminal device.