Patent · US Active

System and method for a radio frequency filter

US11245381B2 · kind B2 · utility

1Cited by

13References

19Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Stefan Helmut Schmalzl · Sauerlach, DE
Peter Pfann · Munich, DE
Ruediger Bauder · Feldkirchen-Westerham, DE
Hans-Joerg Timme · Ottobrunn, DE

Key dates

Filing date	Dec 5, 2018
Grant date	Feb 8, 2022
Priority date	—
Expiry date	Dec 5, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH10N30/853
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

In accordance with an embodiment, an RF system includes a transmit path having a first tunable transmit band stop filter, and a power amplifier coupled to an output of the first tunable transmit band stop filter, where the first tunable transmit band stop filter is configured reject a receive frequency and pass a transmit frequency; a receive path comprising an LNA; and a duplex filter having a transmit path port coupled to an output of the power amplifier, a receive path port coupled to an input of the LNA, and an antenna port, where the duplex filter is configured to pass the transmit frequency and reject the receive frequency between the antenna port and the transmit path port, pass the receive frequency and reject the transmit frequency between the antenna port and the receive path port.

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