Antenna unit for portable radio unit

• US 6,040,804 A
• Filed: 09/29/1998
• Issued: 03/21/2000
• Est. Priority Date: 09/30/1997
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Harano, Nobuya
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US09/162,166
• Time in Patent Office: 539 Days
• Field of Search: 343/702, 343/718, 343/741, 343/866, 343/841, 343/872, 455/90
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

Disclose is an antenna unit for portable radio unit, which has a cell with a metal covering that is disposed opposite to a conductive plate through a dielectric member.

Claims

1. An antenna unit for portable radio unit, comprising:

a cell with a metal covering that is disposed opposite to a conductive plate through a dielectric member.

2. An antenna unit for portable radio unit, according to claim 1, wherein:

said conductive plate is a metal plate disposed on one surface of a cell-encasing part of the portable radio unit.

3. An antenna unit for portable radio unit, according to claim 1, wherein:

said metal covering of said cell and said conductive plate form a radiation element of a dielectric strip antenna.

4. An antenna unit for portable radio unit, according to claim 1, wherein:

said metal covering of said cell is high-frequency-coupled with one of radio-signal input terminals of the portable radio unit.

5. An antenna unit for portable radio unit, according to claim 1, wherein:

said metal covering of said cell is nearly cylindrical.

6. An antenna unit for portable radio unit, according to claim 1, wherein:

said conductive plate is a metal strip extending in the axis direction of said cell.

7. An antenna unit for portable radio unit, according to claim 1, wherein:

said conductive plate is a printed wiring board.

8. An antenna unit for portable radio unit, according to claim 7, wherein:

said printed wiring board has pieces for radio section mounted on said printed wiring board.

9. An antenna unit for portable radio unit, according to claim 1, further comprising:

a metal foil disposed between said cell and said conductive plate, said metal foil being directly connected with a radio section of the portable radio unit.

10. An antenna unit for portable radio unit, according to claim 1, wherein:

said cell is connected with said conductive plate at positions near one end surface of said cell and another end surface to form a loop antenna.

11. An antenna unit for portable radio unit, according to claim 10, wherein:

said metal covering of said cell and said conductive plate are high-frequency-coupled with a radio section of the portable radio unit.