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:
Jan. 06, 2015
Filed:
Oct. 13, 2011
Johanna Meltaus, Espoo, FI;
Tuomas Pensala, Helsinki, FI;
Markku Ylilammi, Espoo, FI;
Tommi Riekkinen, Espoo, FI;
Tomi Mattila, Espoo, FI;
Johanna Meltaus, Espoo, FI;
Tuomas Pensala, Helsinki, FI;
Markku Ylilammi, Espoo, FI;
Tommi Riekkinen, Espoo, FI;
Tomi Mattila, Espoo, FI;
Abstract
The invention describes a manufacturing method for an acoustic balanced-unbalanced (balun) or balanced-balanced thin-film BAW filter based on lateral acoustic coupling. In laterally acoustically coupled thin-film BAW filters (LBAW) one can realize transformation from unbalanced to balanced electric signal if the electrodes of the balanced port are placed on the opposite sides of the piezoelectric film. The manufacturing process is simpler than in the corresponding component based on vertical acoustical coupling. The device can also realize impedance transformation.