The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2003
Filed:
Nov. 13, 2001
Haruyama Shinichi, Yokohama, JP;
Other;
Abstract
Disclosed is a portable communication terminal having an antenna structure capable of achieving a reduction in specific absorption rate (SAR) without preventing earth current from flowing through a PCB of the terminal. A sleeve antenna is arranged opposite to a speaker mounted to a printed circuit board (PCB) in the body of the terminal. The sleeve antenna includes an antenna element formed on an antenna PCB, and a dielectric sleeve. The sleeve antenna is connected to a transmitting/receiving circuit via a coaxial cable. The dielectric sleeve is mounted to a tip of the coaxial cable. The coaxial cable has an outer conductor connected to the inner peripheral conductor of the dielectric sleeve, and a central conductor connected to the feeding point of the antenna element. In accordance with this configuration, there is no antenna current flowing through the PCB. The PCB also serves as an electromagnetic shield plate. Accordingly, a reduction in SAR is achieved.