Portable radio

• US 20060063557A1
• Filed: 05/14/2003
• Published: 03/23/2006
• Est. Priority Date: 05/14/2003
• Status: Abandoned Application

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Tanaka, Tetsuya
• Application Number:
  US10/519,839
• Publication Number:
  US 20060063557A1
• Time in Patent Office: Days
• US Class Current: 455/550.100
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H04B 1/3833 Hand-held transceivers

Abstract

A mobile radio set includes: a first housing and a second housing including any of a transmitter circuit section, a receiver circuit section, and a radio circuit section; a flexible cable providing a connection between a circuit section of the first housing and a circuit section of the second housing; an antenna that is electrically connected to the radio circuit section, and located at the end of the second housing remote from the first housing; a bottom board cable providing a connection between bottom boards of the first housing and second housing; and a variable load that is inserted in series in the bottom board cable. This mobile radio set automatically adjusts phases of the antenna depending on service conditions of the radio set, thereby enabling to assure a stable communication.

Claims

1. A mobile radio set comprising:

a first housing and a second housing including any of a transmitter circuit section, a receiver circuit section, and a radio circuit section;

a flexible cable providing a connection between a circuit section of said first housing and a circuit section of said second housing;

an antenna that is electrically connected to said radio circuit section, and is located at the end of said second housing remote from said first housing;

a bottom board cable providing a connection between bottom boards of said first housing and second housing; and

a variable load that is inserted in series in said bottom board cable.

2. The mobile radio set according to claim 1, wherein a frequency to be used is detected, and a reactance component of said variable load is changed depending on a detected frequency.

3. The mobile radio set according to claim 1, wherein it is detected whether being in a standby state or a telephone call state, and a reactance components of said variable load is changed depending on a detected state.

4. The mobile radio set according to claim 1, wherein said first housing and second housing can be flip-open or closed, it is detected whether or not said housings are in an open state or in a closed state, and a reactance component of said variable load is changed depending on a detected state.

5. The mobile radio set according to claim 1, wherein an active element such as varicap diode is employed as said variable load.

6. The mobile radio set according to claim 2, wherein an active element such as varicap diode is employed as said variable load.

7. The mobile radio set according to claim 3, wherein an active element such as varicap diode is employed as said variable load.

8. The mobile radio set according to claim 4, wherein an active element such as varicap diode is employed as said variable load.