ANTENNA FOR THIN COMMUNICATION APPARATUS

• US 20090128426A1
• Filed: 11/13/2008
• Published: 05/21/2009
• Est. Priority Date: 11/15/2007
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wang, Ching-Sung, Chen, Min-Che
• Granted Patent: US 8,552,912 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 1/52 Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure absorbing means H01Q17/00
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

A PIFA for a thin communication apparatus is provided. The PIFA includes a main body, a ground area and two ground segments, wherein the ground segments are adjacent with each other and extending out from a same side of the ground area. The SAR value and a required height for setting the antenna can be reduced through the design of two grounding paths on the antenna.

Claims

1. A planner inverted F antenna (PIFA), comprising:

a main body;

a ground area, connected to the main body;

a first ground segment, extending out from the ground area for connecting to ground; and

a second ground segment, extending out from the ground area for connecting to the ground,

wherein the first ground segment and the second ground segment have no connection with each other.

2. The PIFA as claimed in claim 1, wherein the first ground segment and the second ground segment extend out from a same side of the ground area.

3. The PIFA as claimed in claim 1, wherein a spacing distance between the first ground segment and the second ground segment is between 1 mm and 10 mm.

4. The PIFA as claimed in claim 1, wherein a width of at least one of the first ground segment and the second ground segment is less than 2 mm.

5. The PIFA as claimed in claim 1 further comprising a feed line extending out from the ground area for transmitting signals transceived by the main body.

6. The PIFA as claimed in claim 5, wherein the first ground segment and the second ground segment extend out from a same side of the ground area, and the feed line extends out from another side of the ground area.

7. The PIFA as claimed in claim 1, wherein the main body comprises:

a first radiation area, connected to the ground area, and capable of responding to a first band; and

a second radiation are, connected to the first radiation area, and capable of responding to a second band.

8. The PIFA as claimed in claim 7, wherein the first band is between 1710 MHz and 2170 MHz.

9. The PIFA as claimed in claim 7, wherein the second band is between 824 MHz and 894 MHz.

10. The PIFA as claimed in claim 1, wherein at least one of the first ground segment and the second ground segment comprises a spring.

11. A communication apparatus, comprising:

a circuit substrate, having a common ground terminal and a signal receiving terminal;

a planner inverted F antenna (PIFA), comprising;

a main body;

a ground area, connected to the main body;

a first ground segment, extending out from the ground area for connecting to the common ground terminal; and

a second ground segment, extending out from the ground area for connecting to the common ground terminal,

wherein the first ground segment and the second ground segment have no connection with each other.

12. The communication apparatus as claimed in claim 11, wherein the first ground segment and the second ground segment extend out from a same side of the ground area.

13. The communication apparatus as claimed in claim 11, wherein a spacing distance between the first ground segment and the second ground segment is between 1 mm and 10 mm.

14. The communication apparatus as claimed in claim 11, wherein a width of at least one of the first ground segment and the second ground segment is less than 2 mm.

15. The communication apparatus as claimed in claim 11 further comprising a feed line extending out from the ground area, and connected to the signal receiving terminal for transmitting signals between the PIFA and the circuit substrate.

16. The communication apparatus as claimed in claim 15, wherein the first ground segment and the second ground segment extend out from a same side of the ground area, and the feed line extends out from another side of the ground area.

17. The communication apparatus as claimed in claim 11, wherein the main body comprises:

a first radiation area, connected to the ground area, and capable of responding to a first band; and

a second radiation are, connected to the first radiation area, and capable of responding to a second band.

18. The communication apparatus as claimed in claim 17, wherein the first band is between 1710 MHz and 2170 Mhz and/or the second band is between 824 Mhz and 894 Mhz.

19. The communication apparatus as claimed in claim 11, wherein at least one of the first ground segment and the second ground segment comprises a spring contacting the common ground terminal.

20. The communication apparatus as claimed in claim 11, wherein a distance between the ground area and the circuit substrate is about 4.5 mm.