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. 30, 2022
Filed:
May. 26, 2020
Denso Corporation, Kariya, JP;
Yuichiro Nakano, Kariya, JP;
Yohei Nakakura, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An antenna driving apparatus drives an antenna by applying to the antenna a drive voltage having a rectangular waveform switching between a high voltage value and a low voltage value in a predetermined cycle. The antenna driving apparatus includes a high-voltage side switch, a low-voltage side switch, a duty ratio acquisition unit, a drive voltage application unit and a duty ratio switching unit. The duty ratio acquisition unit acquires a set value of a duty ratio as a time ratio at which the drive voltage is at the high voltage value in the rectangular waveform. The drive voltage application unit applies to the antenna the drive voltage by repeating execution of turning the high-voltage side switch into the nonconductive state. The duty ratio switching unit alternately executes switching of the duty ratio between a first duty ratio and a second duty ratio.