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:
May. 31, 2016
Filed:
Apr. 23, 2012
Applicants:
Keiichi Umeda, Nagaokakyo, JP;
Teruhisa Shibahara, Nagaokakyo, JP;
Hiroshi Yamada, Nagaokakyo, JP;
Inventors:
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01G 7/00 (2006.01); H01G 5/00 (2006.01); H04R 25/00 (2006.01); H01G 5/18 (2006.01); H01G 5/011 (2006.01);
U.S. Cl.
CPC ...
H01G 5/18 (2013.01); H01G 5/011 (2013.01);
Abstract
A variable capacitance device that operates properly at a point along a signal line through which a high-voltage RF signal passes while reducing a necessary DC voltage includes a substrate, a beam, and lower drive electrodes. The beam is connected to the substrate through a support portion. Lower drive electrodes and the beam generate a capacitance when a DC voltage is applied, and an electrostatic force due to this capacitance deforms the beam. The lower drive electrodes face the beam and are coupled to each other through the beam. An RF signal propagates between the lower drive electrodes.