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:
Aug. 07, 2001
Filed:
Jan. 26, 1999
Applicant:
Inventors:
Hideo Itoh, Yokosuka, JP;
Kiyoshi Egawa, Oiso-machi, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q 1/24 ;
U.S. Cl.
CPC ...
H01Q 1/24 ;
Abstract
The built-in antenna for radio communication terminals of the present invention includes a loop antenna with a circumference of approximately one wavelength or less placed at an extremely short distance compared with the wavelength from the plane of the terminal board so that its loop plane may be perpendicular to the plane of said terminal bottom board which is opposite to the human body during communication, and a balanced/unbalanced conversion circuit with an impedance conversion function that supplies power to this loop antenna.