Portable radio

• US 5,999,831 A
• Filed: 03/27/1997
• Issued: 12/07/1999
• Est. Priority Date: 04/01/1996
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Itoh, Ryoh
• Primary Examiner(s): Vo, Nguyen
• Assistant Examiner(s): NGUYEN, DUC M
• Application Number:
  US08/827,192
• Time in Patent Office: 985 Days
• Field of Search: 455/575, 455/90, 455/550, 455/301, 455/302, 455/347, 455/351, 343/702, 343/841, 379/428, 379/430, 361/814, 361/816
• US Class Current: 455/575.7
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H04B 1/3833 Hand-held transceivers

Abstract

In a portable radio of the present invention, in order to reduce an influence of a flexed unit near an antenna with a structure that the antenna is fitted to a flexion portion of the unit, a conduction portion of the unit is divided into upper and lower sections interposing an antenna fitting portion. An actual resistor is inserted into the middle of an connection line (cable) for electrically connecting the upper and lower sections, thereby cutting a high frequency current. Alternatively, an inductor is inserted into the middle of the connection line (cable), thereby cutting a conduction between the upper and lower sections in a high frequency manner. The unit of the portable unit may be a structure that it is divided into upper and lower unit sections and it is foldable.

Claims

1. A portable radio in which an antenna is fitted to a flexion portion of a flexed unit, the portable radio comprising:

upper and lower circuit portions arranged in each of upper and lower unit sections of said flexed unit, said upper and lower circuit portions being divided interposing a fitting portion of said antenna to said flexion portion, said antenna being electrically connected to said lower circuit portion and having an upper portion proximate to the upper circuit portion;

an external conduction body outside said unit;

a plurality of connection lines which connect said upper and lower circuit portions and said conduction body; and

a plurality of elements, each being arranged in a middle of corresponding one of said connection lines, said elements serving to cut a conduction of a high frequency current between said upper and lower circuit portions thereby reducing the effect of a generated electric field from the upper circuit portion on the upper portion of the antenna.

2. The portable radio according to claim 1, wherein each element which cuts the conduction of said high frequency current between said upper and lower circuit portions is a resistor.

3. The portable radio according to claim 2, wherein at least one of said resistors which cut the conduction of said high frequency current between said upper and lower circuit portions in said connection lines includes an inductor.

4. The portable radio according to claim 3, wherein said flexed unit is a folding unit, and said antenna is placed at a hinge portion of the folding unit.

5. The portable radio according to claim 2, wherein said flexed unit is a folding unit, and said antenna is placed at a hinge portion of the folding unit.

6. The portable radio according to claim 1, wherein each element which cuts the conduction of said high frequency current between said upper and lower circuit portions is an inductor.

7. The portable radio according to claim 6, wherein said flexed unit is a folding unit, and said antenna is placed at a hinge portion of the folding unit.

8. The portable radio according to claim 1, wherein some of said elements which cut the conduction of said high frequency current between said upper and lower circuit portions are resistors, and the other of said elements are inductors.

9. The portable radio according to claim 8, wherein said flexed unit is a folding unit, and said antenna is placed at a hinge portion of the folding unit.

10. The portable radio according to claim 1, wherein said flexed unit is a folding unit, and said antenna is placed at a hinge portion of the folding unit.