Internal antenna for a mobile handset

• US 7,259,720 B2
• Filed: 10/14/2005
• Issued: 08/21/2007
• Est. Priority Date: 11/20/2003
• Status: Expired due to Fees

• Current Assignee: Pantech Incorporated
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: Ryu, Ji Woong
• Primary Examiner(s): WIMER, MICHAEL C
• Application Number:
  US11/251,170
• Publication Number:
  US 20060033668A1
• Time in Patent Office: 676 Days
• Field of Search: 343/700.MS, 343/702, 343/741, 343/866, 343/895, 343/846
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 5/392 the parasitic elements having dual-band or multi-band characteristics
• 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

The present invention relates to an internal antenna for a mobile handset comprising: a feeding pin for power supply; an upper radiating patch connected to the feeding pin, having a first upper patch portion and a second upper patch portion, which receive power supply from the feeding pin and resonate at different frequency bands respectively; a side radiating patch receiving power supply from the feeding pin, extended along the side of the upper radiating patch and vertically apart from the upper radiating patch by certain distance; and a short pin, one end of which is in contact with the upper radiating patch and the side radiating patch and the other end of which is grounded. According to the present invention, a bandwidth to be used can be broadened without increasing space for a general small size dual band Planar Inverted F Antenna PIFA.

Claims

1. A mobile handset having an antenna, wherein said antenna comprises:

a feeding pin for power supply;

an upper radiating patch connected to the feeding pin, having a first upper patch portion and a second upper patch portion, which receive power supply from the feeding pin and resonate at different frequency bands respectively;

a side radiating patch receiving power supply from the feeding pin, extended along the side of the upper radiating patch, wherein at least a portion of the side radiating patch is formed to be diagonal to the upper radiating patch; and

a short pin, one end of which is in contact with the upper radiating patch and the side radiating patch and the other end of which is grounded.

2. A mobile handset of claim 1, wherein at least a portion of the side radiating patch is formed to be horizontal to the upper radiating patch.

3. A mobile handset of claim 1, wherein at least a portion of the side radiating patch aparts from the upper radiating patch in parallel.

4. A mobile handset of claim 1, wherein the side radiating patch comprises:

a first side patch portion for resonating at a same frequency band as the first upper patch portion; and

a second side patch portion for resonating at a same frequency band as the second upper patch portion.

5. A mobile handset of claim 1, wherein at least one of the first upper patch portion and the second upper patch portion is formed to have a shape of a meander line.

6. A mobile handset of claim 1, wherein the side radiating patch has a shape corresponding to an outer line of the upper radiating patch.

7. A mobile handset of claim 4, wherein the first upper patch portion and the first side patch portion resonate at different frequencies respectively.

8. A mobile handset of claim 4, wherein the second upper patch portion and the second side patch portion resonate at different frequencies respectively.

9. A mobile handset of claim 4, wherein impedance of the first upper patch portion, the second upper patch portion, the first side patch portion and the second side patch portion change according to a location of a feeding point.

10. A mobile handset of claim 4, wherein impedance of the first upper patch portion, the second upper patch portion, the first side patch portion and the second side patch portion change according to a width of the short pin.

11. A mobile handset of claim 4, wherein operating frequencies of the first upper patch portion, the second upper patch portion, the first side patch portion and the second side patch portion change respectively according to lengths of the first upper patch portion, the second upper patch portion, the first side patch portion and the second side patch portion.

12. A mobile handset of claim 4, wherein a length of the first upper patch portion is equal to a quarter wavelength of its own operating frequency.

13. A mobile handset of claim 4, wherein a length of the second upper patch portion is equal to a quarter wavelength of its own operating frequency.

14. A mobile handset of claim 4, wherein a length of the first side patch portion is equal to a quarter wavelength of its own operating frequency.

15. A mobile handset of claim 4, wherein a length of the second side patch portion is equal to a quarter wavelength of its own operating frequency.

16. A mobile handset having an antenna, wherein said antenna comprises:

a feeding pin for power supply;

an upper radiating patch connected to the feeding pin, having a first upper patch portion and a second upper patch portion, which receive power supply from the feeding pin and resonate at different frequency bands respectively;

a side radiating patch receiving power supply from the feeding pin, extended along the side of the upper radiating patch, wherein at least a portion of the side radiating patch is formed to be vertical to the upper radiating patch; and

a short pin, one end of which is in contact with the upper radiating patch and the side radiating patch and the other end of which is grounded.