Patent · US Active

Acoustic filter with improved reflectivity

US12068737B2 · kind B2 · utility

0Cited by

0References

12Claims

0Family size

Assignee

RF360 Singapore Pte. Ltd. · SG

Inventors

Simone Colasanti · Bayern, DE
Samir Tazarine · Munich, DE
Robert Koch · Munich, DE
Franz Kubat · Munich, DE

Key dates

Filing date	Dec 13, 2019
Grant date	Aug 20, 2024
Priority date	—
Expiry date	Feb 18, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/725
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A filter circuit comprises a main operating unit (MU) arranged in the series signal line providing most of the filter function of the filter circuit. A micro acoustic last series resonator (RLs) as a last element of the main operating unit in the series signal line is prone to excite a spurious mode that is damped with a final series capacitance (CEs) circuited between the last element and the antenna terminal (AT).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.