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:
Mar. 15, 2016
Filed:
Nov. 24, 2010
Kenichi Amma, Tokyo, JP;
Tomohisa Kimura, Tokyo, JP;
Nobuhiko Fukuda, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A power receiving device includes: a plurality of antennas, a plurality of rectenna rectifying circuits each of which is provided to correspond to each of the antennas and each of which converts electromagnetic waves received by the corresponding antenna into DC power and outputs the DC power; a connection switching circuit which is provided between the plurality of rectenna rectifying circuits and a load and which performs switching between serial/parallel connection states of the output side of the plurality of rectenna rectifying circuits; a current sensor which measures current flowing through the load; and a control section which, on the basis of the current measured by the current sensor, selects a serial/parallel connection state of the rectenna rectifying circuits, the state enabling the RF-DC conversion efficiency to be maximized, and which controls the connection switching circuit so that the rectenna rectifying circuits is in the selected serial/parallel connection state.