US 11,894,836 B2
Electro acoustic RF filter with impedance element having improved performance and multiplexer component comprising the filter
Ansgar Schaeufele, Munich (DE); Thomas Bauer, Munich (DE); and Gholamreza Dadgar Javid, Munich (DE)
Assigned to RF360 Singapore Pte. Ltd., Singapore (SG)
Appl. No. 17/275,437
Filed by RF360 SINGAPORE PTE. LTD., Singapore (SG)
PCT Filed Oct. 15, 2019, PCT No. PCT/EP2019/077912
§ 371(c)(1), (2) Date Mar. 11, 2021,
PCT Pub. No. WO2020/078971, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 10 2018 125 498.9 (DE), filed on Oct. 15, 2018.
Prior Publication US 2022/0052669 A1, Feb. 17, 2022
Int. Cl. H03H 9/64 (2006.01); H03H 9/25 (2006.01)
CPC H03H 9/6483 (2013.01) [H03H 9/25 (2013.01); H03H 9/6493 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electro acoustic RF filter, comprising:
an input port and an output port;
an electro acoustic resonator electrically connected between the input port and the output port;
an acoustically inactive impedance element electrically coupled to the electro acoustic resonator; and
a damping and/or dissipation element connected to the acoustically inactive impedance element, wherein the damping and/or dissipation element is provided and configured to remove acoustic energy from the inactive impedance element by either dissipation of acoustic energy, or by reducing the coupling or by suppressing an acoustic mode.