Antenna assembly and wireless communication device employing same

Patent metadata

Field	Value
Publication number	US-9577320-B2
Application number	US-201514677727-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Oct 31, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An antenna assembly includes an elastic piece, a connecting portion, a first radiating portion, and a second radiating. The connecting portion is coupled to the base board and includes a feeding point and a ground point. The first radiating portion is electrically connected to the feeding point and the elastic piece. The second radiating portion is electrically connected to the ground point and spaced from the first radiating portion. The first radiating portion, the elastic piece, and the second radiating portion are configured to operate at a first frequency band; the first radiating portion and the elastic piece generate a frequency-doubled effect to operate at a second frequency band. A wireless communication device employing the antenna assembly is also provided.

First claim

What is claimed is:

1. An antenna assembly coupled to a base board, the antenna assembly comprising:
a base board;
a connecting portion coupled to the base board and comprising a feeding point and a ground point;
a first radiating portion electrically connected to the feeding point and an elastic piece; and
a second radiating portion electrically connected to the ground point, and coupled to the first radiating portion via the elastic piece, and spaced from the first radiating portion;
wherein the first radiating portion, the elastic piece, and the second radiating portion are configured to operate at a first frequency band; the first radiating portion and the elastic piece generate a frequency-doubled effect to operate at a second frequency band.

2. The antenna assembly as claimed in claim 1 , wherein the first radiating portion comprises a first radiating section and a second radiating section perpendicularly coupled to the first radiating section, the first radiating section is coplanar with the second radiating section.

3. The antenna assembly as claimed in claim 2 , wherein the elastic piece is coupled to the second radiating section; the first radiating section comprises a first end, a second end, and a gap formed between the first end and the second end; the first end is electrically connected to the feeding end, the second end is coupled to the second radiating section.

4. The antenna assembly as claimed in claim 3 , wherein the gap receive a resistor for electrically connected to the first end and the second end, the resistor is configured to limit current for the first radiating portion.

5. The antenna assembly as claimed in claim 3 , wherein the elastic piece is substantially V-shaped and made of metal by bending, the elastic piece comprises a first bending portion and a second bending portion crookedly connected to the first bending portion, the first bending portion is coupled to the second radiating section.

6. The antenna assembly as claimed in claim 3 , wherein the second radiating portion comprises a first extending section and a second extending section perpendicularly coupled to the first extending section; the first extending section is coupled to the ground point, an end of the second extending section is perpendicularly coupled to the first extending section, and the other end extends over the second radiating section.

7. The antenna assembly as claimed in claim 6 , wherein the first extending section is paralleled to the first radiating section and has a greater length than the first radiating section, the first extending section is coplanar with the first radiating portion, a plane of the second extending section is perpendicular to a plane of the first extending section.

8. The antenna assembly as claimed in claim 7 , wherein the connecting portion is made of conductive material and comprises a first connecting section and a second connecting section perpendicularly coupled to the first connecting section; the first connecting section is coupled to the base board, the feeding point and the ground point are arranged on the first connecting section.

9. A wireless communication device comprising:
a base board;
a support member;
a connector received in the support member; and
an antenna assembly coupled to the base board and arranged on the support member, the antenna assembly comprising:
an elastic piece;
a connecting portion coupled to the base board and comprising a feeding point and a ground point;
a first radiating portion electrically connected to the feeding point and the elastic piece;
a second radiating portion electrically connected to the ground point, and coupled to the first radiating portion via the elastic piece, and spaced from the first radiating portion; and
a connecting portion configured to support the connector and electrically connected to the connector;
wherein the first radiating portion, the elastic piece, and the second radiating portion are configured to operate at a first frequency band; the first radiating portion and the elastic piece generate a frequency-doubled effect to operate at a second frequency band.

10. The wireless communication device as claimed in claim 9 , wherein the support member comprises a top wall and two opposite sidewall, the top wall and the two opposite sidewall enclose a receiving space configured to receive the connector.

11. The wireless communication device as claimed in claim 10 , wherein the first radiating portion and the second radiating portion are arranged on the top wall, the first radiating portion comprises a first radiating section and a second radiating section perpendicularly coupled to the first radiating section, the first radiating section is coplanar with the second radiating section.

12. The wireless communication device as claimed in claim 11 , wherein the elastic piece is coupled to the second radiating section; the first radiating section comprises a first end, a second end, and a gap formed between the first end and the second end; the first end is electrically connected to the feeding end, the second end is coupled to the second radiating section.

13. The wireless communication device as claimed in claim 12 , wherein the gap receive a resistor for electrically connected to the first end and the second end, the resistor is configured to limit current for the first radiating portion.

14. The wireless communication device as claimed in claim 12 , wherein the elastic piece is substantially V-shaped and made of metal by bending, the elastic piece comprises a first bending portion and a second bending portion crookedly connected to the first bending portion, the first bending portion is coupled to the second radiating section.

15. The wireless communication device as claimed in claim 12 , wherein the second radiating portion comprises a first extending section and a second extending section perpendicularly coupled to the first extending section; the first extending section is coupled to the ground point, an end of the second extending section is perpendicularly coupled to the first extending section, and the other end extends over the second radiating section, the second extending section is perpendicular to the top wall to increase an efficiency of the antenna assembly.

16. The wireless communication device as claimed in claim 15 , wherein the first extending section is paralleled to the first radiating section and has a greater length than the first radiating section, the first extending section is coplanar with the first radiating portion, a plane of the second extending section is perpendicular to a plane of the first extending section.

17. The wireless communication device as claimed in claim 16 , wherein the connecting portion is made of conductive material and comprises a first connecting section and a second connecting section perpendicularly coupled to the first connecting section; the first connecting section is sandwiched between the base board and one of the sidewall of the support member, the feeding point and the ground point are arranged on the first connecting section.

18. The wireless communication device as claimed in claim 17 , wherein the connector is supported on the second connecting section and electrically connected to the base board via the connecting portion.

19. The wireless communication device as claimed in claim 9 , wherein the base board is a printed circuit board defining a clearance zone for providing impedance matching for the antenna assembly.

20. The wireless communication device as cla

Assignees

• Chiun Mai Communication Systems Inc
• Chiun Mai Communications Systems Inc

Inventors

• Liou Geng-Hong
• Lin Yen-Hui

Classifications

• H01Q1/243 Primary

  with built-in antennas · CPC title

• H01Q1/2291

  used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W) · CPC title