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:
Oct. 14, 2014
Filed:
Sep. 02, 2010
Haruya Ishizaki, Tokyo, JP;
Haruya Ishizaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a radio power converter and a radio communication apparatus in which an environmental electromagnetic wave is efficiently converted into an operation power of a semiconductor integrated circuit by using a coil antenna configured within the semiconductor integrated circuit. The radio communication apparatus converts the received environmental electromagnetic wave into a direct-current voltage and charges a decoupling capacitor with an electric power so as to increase the direct-current voltage. A resonance frequencies of an antenna are changed depending upon a value of the increased direct-current voltages. The antenna sequentially receives environmental electromagnetic waves having different resonance frequencies for thereby increasing the direct-current voltage to a desired direct-current voltage.