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:
Sep. 25, 2018
Filed:
Feb. 24, 2012
Shoji Nagumo, Kyoto-fu, JP;
Masaaki Takata, Kyoto-fu, JP;
Noriyuki Ueki, Kyoto-fu, JP;
Hiromasa Koyama, Kyoto-fu, JP;
Shoji Nagumo, Kyoto-fu, JP;
Masaaki Takata, Kyoto-fu, JP;
Noriyuki Ueki, Kyoto-fu, JP;
Hiromasa Koyama, Kyoto-fu, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
This disclosure provides an antenna apparatus in which stable antenna characteristics are maintained by detecting surrounding conditions that affect the antenna characteristics and appropriately compensating the antenna characteristics. More specifically, when surrounding condition such as a human body (e.g., a palm or fingers) approaches and enters an electric field of a pseudo dipole formed by an antenna element electrode, a stray capacitance is sensed and stable antenna characteristics are maintained by appropriately controlling an antenna matching circuit to compensate for a change in the antenna characteristics due to the approach of the surrounding condition.