Portable wireless device

• US 7,630,743 B2
• Filed: 06/29/2006
• Issued: 12/08/2009
• Est. Priority Date: 06/30/2005
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Uejima, Hiroyuki, Yamaguchi, Takeshi, Imano, Daigo
• Primary Examiner(s): Tran; Pablo N
• Application Number:
  US11/570,974
• Publication Number:
  US 20090170570A1
• Time in Patent Office: 1,258 Days
• Field of Search: 455/575.3, 455/575.1, 455/90.3, 455/550.1, 455/575.7, 455/556.1, 455/562.1, 455/575.4, 455/575.5, 455128-129, 455/347, 343/700.MS, 343/702, 343/767
• US Class Current: 455/575.3
• CPC Class Codes: H01Q 1/243 with built-in 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: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235

Abstract

A portable wireless device is formed of a lower housing and an upper housing coupled together by a hinged section, which makes the device foldable. A lower circuit board is coupled to an upper circuit board by a flexible cable, which is placed away from a power feeder of an antenna element with a given space and near the hinged section along the width direction of this foldable device. An end of conductive element is shorted to the lower circuit board with a shorting conductor near a connector which couples the flexible cable to the lower circuit board. The foregoing structure allows the portable and foldable wireless device to reduce an amount of energy supposed to be absorbed into a temporal region of a human body while the electric power of the transmitted radio wave is maintained during a phone conversation.

Claims

1. A portable wireless device comprising:

a first housing;

a second housing;

a hinged section for coupling the first housing to the second housing and allowing the first and the second housings to be foldable and unfoldable;

a first circuit board placed at the first housing;

a second circuit board placed at the second housing;

a wiring bundle formed of a plurality of conductive cables that couple the first circuit board to the second circuit board;

a power feeder placed at an end of the first circuit board in a width direction and near the hinged section;

an antenna element powered by the power feeder and placed at the first housing;

a conductive element having a given length; and

a shorting conductor coupled to an end of the conductive element, wherein a connector between the wiring bundle and the first circuit board is placed away from the power feeder by a given distance along the width direction of the first circuit board, and the conductive element is shorted to the first circuit board at a place near the connector via the shorting conductor.

2. The portable wireless device of claim 1, wherein the first housing includes a mouthpiece and the second housing includes a earpiece.

3. The portable wireless device of claim 1, wherein a sum of an electrical length of the antenna element, an electrical length extending from the power feeder to the connector, an electrical length of the shorting conductor, and an electrical length of the conductive element is longer than a half of a wavelength of a frequency presently used and not longer than one wavelength of the frequency.

4. The portable wireless device of claim 1, wherein a sum of an electrical length of the antenna element, an electrical length extending from the power feeder to the connector, an electrical length of the shorting conductor, and an electrical length of the conductive element is approximately three quarters of a wavelength of a frequency presently used.

5. The portable wireless device of claim 2, wherein a sum of an electrical length of the antenna element, an electrical length extending from the power feeder to the connector, an electrical length of the shorting conductor, and an electrical length of the conductive element is longer than a half of a wavelength of a frequency presently used and not longer than one wavelength of the frequency.

6. The portable wireless device of claim 2, wherein a sum of an electrical length of the antenna element, an electrical length extending from the power feeder to the connector, an electrical length of the shorting conductor, and an electrical length of the conductive element is approximately three quarters of a wavelength of a frequency presently used.