Mobile terminal equipment and antenna thereof

• US 7,786,939 B2
• Filed: 02/21/2005
• Issued: 08/31/2010
• Est. Priority Date: 02/20/2004
• Status: Expired due to Fees

• Current Assignee: LG Telecom Incorporated (LG Corporation)
• Original Assignee: LG Telecom Incorporated (LG Corporation)
• Inventors: Lee, Hyo Jin
• Primary Examiner(s): MANCUSO, HUEDUNG XUAN CAO
• Application Number:
  US10/589,824
• Publication Number:
  US 20080042918A1
• Time in Patent Office: 2,017 Days
• Field of Search: 343/702, 343/895, 343900-901
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises

Abstract

The present invention relates to a mobile terminal and an antenna thereof of which the radiation pattern is not distorted regardless of the length of the mobile terminal. The mobile terminal includes a terminal body; an antenna connected to a high frequency signal source within the terminal body; and a grounding means connected to a ground voltage source within the terminal body.

Claims

1. A mobile terminal, comprising:

a terminal body;

an antenna connected to a high frequency signal source within the terminal body; and

a grounding means connected to a ground voltage source within the terminal body, and

wherein the antenna includes;

an antenna coil to receive a high frequency signal power from the high frequency signal source;

a conductive inner core electrically connected to the high frequency signal source and the antenna coil;

a core through which a conductive inner core penetrates, of which the surface is insulated from the conductive inner core, and which has a conductive surface electrically connected to the ground voltage source; and

at least one grounding coil connected to the ground voltage source through the conductive surface of the core.

2. The mobile terminal according to claim 1, wherein the antenna is a monopole antenna.

3. The mobile terminal according to claim 1, wherein the grounding means is exposed to the outside of the terminal body.

4. The mobile terminal according to claim 1, wherein the grounding means is embedded within the terminal body.

5. The mobile terminal according to claim 4, wherein an electro magnetic interference EMI intercepting metal shield is formed in a space other than a space where the grounding means is formed in the inside of the terminal body.

6. The mobile terminal according to claim 1, wherein each linear length of the antenna coil and the grounding coil is ¼

of the wavelength of the electric wave.

7. An antenna of a mobile terminal, comprising:

an antenna coil to receive a high frequency signal; and

a grounding means having a length of ¼

of a wavelength of an electric wave;

a first core on which the antenna coil is wound;

a conductive inner core electrically connected to one end of the antenna coil to receive the high frequency signal; and

a second core through which the conductive inner core penetrates and of which the surface is insulated from the conductive inner core, and

wherein the at least one grounding coil is wound on the surface of the second core.

8. The antenna of a mobile terminal according to claim 7, further comprising:

a core through which the conductive inner core penetrates, which remains to be insulated from the conductive inner core and which has a conductive surface connected to the ground voltage source, and

wherein one end of the at least one grounding coil is connected to the surface of the core.

9. An antenna of a mobile terminal, comprising:

an antenna coil;

a first core on which the antenna coil is wound;

a conductive inner core electrically connected to one end of the antenna coil to supply a high frequency signal to the antenna coil;

a second core through which the conductive inner core penetrates and of which the surface is insulated from the conductive inner core; and

at least one grounding coil wound on the second core to receive a ground voltage.

10. An antenna of a mobile terminal, comprising:

an antenna coil;

a conductive inner core electrically connected to one end of the antenna coil to supply a high frequency signal to the antenna coil;

a core through which the conductive inner core penetrates;

a grounding surface formed on the surface of the core to receive a ground voltage;

at least one grounding coil connected to the grounding surface, and

wherein one end of the at least one grounding coil is connected to the grounding surface.