Foldable portable radio

• US 20070164913A1
• Filed: 10/28/2005
• Published: 07/19/2007
• Est. Priority Date: 10/28/2004
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sakamoto, Akito, Nakanishi, Hideo, Kikuchi, Masanori, Kobayashi, Masao
• Granted Patent: US 7,456,794 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01R 2201/02 for antennas
• CPC Class Codes: H01R 2201/16 for telephony
• CPC Class Codes: H01R 35/02 Flexible line connectors without frictional contact members
• CPC Class Codes: H04M 1/0216 Foldable in one direction, i.e. using a one degree of freedom hinge

Abstract

In the foldable mobile radio apparatus constructed by coupling two cases to open and close, the high antenna performance can be secured over the wider band with the simple structure. A foldable mobile radio apparatus, includes a first case, an antenna element provided to the first case, a second case, a hinge portion for joining the first case and the second case turnably, a circuit board provided to an inside of the second case and having a ground pattern, and a feeding portion connected to a radio circuit on the circuit board. The hinge portion is formed of a nonconductive resin, and has a rotation shaft made of conductive metal to join the first case and the second case turnably. The rotation shaft is spatially coupled to the antenna element at a predetermined interval, and the rotation shaft is arranged to separate from the ground pattern on the circuit board, and is connected electrically to the feeding portion. Also, the antenna element, the rotation shaft, and the ground pattern on the circuit board operate as an antenna.

Claims

1. A foldable mobile radio apparatus, comprising:

a first case;

an antenna element that is provided to the first case;

a second case;

a hinge portion that joins the first case and the second case turnably; and

a circuit board that is provided in the second case, and has a ground pattern and a feeding portion,

wherein the hinge portion has a rotation shaft formed by conductive metal to join the first case and the second case turnably;

wherein the rotation shaft is spatially coupled to the antenna element at a predetermined interval;

wherein the rotation shaft is arranged to the hinge portion in a state that the rotation shaft is separated from the ground pattern on the circuit board, and is electrically connected to the feeding portion; and

wherein the antenna element, the rotation shaft, and the ground pattern on the circuit board operate as an antenna when a power is fed.

3. The foldable mobile radio apparatus according to claim 1, wherein the antenna element is either a conductive plate constituting a part of the first case or a circuit board having the ground pattern.

4. The foldable mobile radio apparatus according to claim 1, wherein a total length containing the rotation shaft from the feeding portion has an electric length of about ¼

wavelength at a predetermined frequency; and

wherein the antenna element has an electric length of about ½

wavelength at the predetermined frequency.

5. The foldable mobile radio apparatus according to claim 1, wherein an antenna characteristic is adjusted by changing an interval and an area between opposing surfaces of the conductive plate and the rotation shaft mutually.

2. A foldable mobile radio apparatus, comprising:

a first case;

an antenna element that is provided to the first case;

a second case;

a hinge portion that joins the first case and the second case turnably; and

a circuit board that is provided in the second case, and has a ground pattern and a feeding portion,

wherein the hinge portion has a rotation shaft formed by conductive metal to join the first case and the second case turnably;

wherein the rotation shaft is connected to the antenna element via an impedance element,

wherein the rotation shaft is arranged to the hinge portion in a state that the rotation shaft is separated from the ground pattern on the circuit board, and is electrically connected to the feeding portion; and

wherein the antenna element, the rotation shaft, and the ground pattern on the circuit board operate as an antenna when a power is fed.

6. The foldable mobile radio apparatus according to claim 2, wherein the antenna element is either a conductive plate constituting a part of the first case or a circuit board having the ground pattern.

7. The foldable mobile radio apparatus according to claim 2, wherein a total length containing the rotation shaft from the feeding portion has an electric length of about ¼

wavelength at a predetermined frequency; and

wherein the antenna element has an electric length of about ½

wavelength at the predetermined frequency.

8. The foldable mobile radio apparatus according to claim 2, wherein an antenna characteristic is adjusted by changing an interval and an area between opposing surfaces of the conductive plate and the rotation shaft mutually.