Electronic apparatus and wireless communication terminal

• US 8,103,319 B2
• Filed: 10/09/2008
• Issued: 01/24/2012
• Est. Priority Date: 07/06/2004
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ikeda, Masayuki
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): Nguyen, Hai V
• Application Number:
  US12/248,337
• Publication Number:
  US 20090131130A1
• Time in Patent Office: 1,202 Days
• Field of Search: 455/575.7
• US Class Current: 455/575.1
• CPC Class Codes: H04B 1/3827 Portable transceivers

Abstract

In an electronic apparatus which is equipped with a first transmission unit for performing a first communication by an electromagnetic wave; a second transmission unit for performing a second communication by an electromagnetic wave; and a reception unit for receiving a signal transmitted from the second transmission unit, the electronic apparatus is comprised of an antenna arranged by a radiator having a size which is smaller than 1/(2π) of a wavelength of a use electromagnetic wave, which is connected to at least the second transmission unit and the reception unit.

Claims

1. An electronic apparatus comprising:

a transmission unit that communicates using electromagnetic waves;

a reception unit that receives the electromagnetic waves;

a first antenna that includes a radiator within a sphere, the sphere of the first antenna having a diameter less than 1/(2π

) of a wavelength of the electromagnetic waves;

a second antenna that includes a radiator within a sphere, the sphere of the second antenna having a diameter less than 1/(2π

) of the wavelength of the electromagnetic waves;

an evaluation unit that evaluates a reception condition of the reception unit;

a control unit that controls a frequency of the electromagnetic waves; and

a feedback unit that feeds back a result of the evaluation unit,

wherein the transmission unit and the reception unit are both located in the electronic apparatus,

wherein the transmission unit uses the first antenna, and

wherein the reception unit uses the second antenna.

2. A wireless communication terminal comprising:

a first housing;

a second housing;

a coupling unit that is capable of coupling the first housing and the second housing in a fold-flat manner;

a display;

a first controller and a second controller that control internal wireless communication between the first housing and the second housing via electromagnetic waves;

a first antenna that includes a first radiator within a first sphere, the first sphere having a first diameter less than 1/(2π

) of a wavelength of the electromagnetic waves;

a second antenna that includes a second radiator within a second sphere, the second sphere having a second diameter less than 1/(2π

) of the wavelength of the electromagnetic waves; and

a timing unit that controls a transmission timing of the electromagnetic waves,

wherein the first antenna is located in the first housing and the second antenna is located in the second housing.

3. The wireless communication terminal according to claim 2, wherein the wireless communication terminal includes at least one of a mobile telephone, a video camera, a personal digital assistant, and a laptop computer.