US 2004/0023682 A1 · Mobile phone having reduced specific absorption rate (SAR) using an antenna housed to ensure enhanced antenna gain

Abstract

The present invention relates to a structure of an antenna and its shielding structure for a mobile phone which may significantly reduce the hazardous electromagnetic wave transmitted to the user's body. The present invention arranges a monopole antenna inside of the mobile phone housing, and installs an electromagnetic wave absorber between the antenna and the circuit board. The electromagnetic wave absorber can absorb the electromagnetic wave reflected form conductive plate constituting the circuit board. Thus, the adverse effect of the reflected electromagnetic wave to the performance of antenna is prevented and the amount of the electromagnetic wave to which the users is exposed can be significantly reduced as well.

Claims34

Dependent claims

A mobile phone comprising:

a) at least one circuit board being used to accommodate various electronic devices performing various functions such as transmission and reception of electromagnetic wave;
b) an antenna being used to allow said electronic devices installed on said circuit board to transmit/receive the electromagnetic wave;
and
c) a housing in which said circuit board is contained, wherein said antenna is arranged in said housing, and an electromagnetic wave absorber is arranged between said circuit board and said antenna.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/380,000Filed 4 Mar 2003

Priority

KR 2002-520684 Sep 2000

Published

5 Feb 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04B 1/3838
Hand-held transceivers: arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
H01Q 1/245
Specially adapted for hand-held use: with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
H01Q 17/001
Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems: for modifying the…
H04B
Transmission

Mobile phone having reduced specific absorption rate (SAR) using an antenna housed to ensure enhanced antenna gain

Life of this patent

Mobile phone having reduced specific absorption rate (SAR) using an antenna housed to ensure enhanced antenna gain

Life of this patent

Abstract

Claims34