US 12,113,513 B2
Filter and multi-filter
Tomonori Urata, Kyotanabe (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 17/434,094
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Feb. 18, 2020, PCT No. PCT/JP2020/006261
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/175240, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-032368 (JP), filed on Feb. 26, 2019.
Prior Publication US 2022/0140816 A1, May 5, 2022
Int. Cl. H03H 9/56 (2006.01); H03H 9/13 (2006.01); H03H 9/17 (2006.01)
CPC H03H 9/568 (2013.01) [H03H 9/13 (2013.01); H03H 9/17 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A filter comprising:
a ladder filter portion formed on a first piezoelectric substrate; and
a multi-mode filter portion connected to the ladder filter portion and formed on a second piezoelectric substrate different from the first piezoelectric substrate,
wherein the ladder filter portion and the multi-mode filter portion constitute a single passband, and
wherein an electrode thickness of the ladder filter portion is different from an electrode thickness of the multi-mode filter portion.