Antenna for the folding mobile telephones

• US 6,266,538 B1
• Filed: 03/03/1999
• Issued: 07/24/2001
• Est. Priority Date: 03/05/1998
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Waldron, Rupert James
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): BEAMER, TEMICA M
• Application Number:
  US09/261,500
• Time in Patent Office: 874 Days
• Field of Search: 455/550, 455/552, 455/553, 455/575, 455/90, 343/702, 343/767
• US Class Current: 455/575.7
• CPC Class Codes: H01Q 1/084 Pivotable antennas
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 9/30 with feed to end of elongated active element, e.g. unipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An antenna for a folding mobile phone comprises two main sections connected by a hinge mechanism. When the mobile phone is in the open position (the normal operating position), the antenna comprises a planar conducting sheet combined with a slotted plate and acts as a monopole. When the mobile phone is in the closed position (the standby position), the antenna comprises the slotted plate acting as a slot antenna with the planar conducting sheet forming a reflector.

Claims

1. A dual mode antenna for use with a folding mobile phone, wherein said antenna is switched between a normal operating position and a standby position, in said normal operating position said antenna acting as a monopole comprises a planar conducting sheet combined with a slotted plate;

and in said standby position said antenna comprises said slotted plate acting as a slot antenna with said planar conducting sheet forming a reflector.

2. A dual mode antenna as set forth in claim 1 wherein a width of part of a slot in said slotted plate is increased to provide access to a visual display.

3. A dual mode antenna as set forth in claim 1 wherein a width of part of slot in said slotted plate is increased to provide access to a keypad.

4. A dual mode antenna as set forth in claim 2 wherein the width of part of slot in said slotted plate is increased to provide access to a keypad.

5. A dual mode antenna as set forth in claim 2 wherein part of the slot in said slotted plate increased to provide access is filled with a transparent material.

6. A dual mode antenna as set forth in claim 1 wherein said planar conducting sheet is a metal plating on a printed circuit board.

7. A dual mode antenna as set forth in claim 2 wherein said planar conducting sheet is a metal plating on a printed circuit board.

8. A dual mode antenna as set forth in claim 3 wherein said planar conducting sheet is a metal plating on a printed circuit board.

9. A dual mode antenna as set forth in claim 4 wherein said planar conducting sheet is a metal plating on a printed circuit board.

10. A dual mode antenna as set forth in claim 5 wherein said planar conducting sheet is a metal plating on a printed circuit board.