US 12,362,776 B2
Radio frequency system with tunable notch filters
Fei Jia, Calabasas, CA (US); Joshua Kawika Ellis, Camarillo, CA (US); Kun Chen, Thousand Oaks, CA (US); Shayan Farahvash, Kensington, CA (US); Haisu Ju, Thousand Oaks, CA (US); and Haibo Cao, Newbury Park, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jun. 8, 2023, as Appl. No. 18/331,839.
Application 18/331,839 is a continuation of application No. 17/410,931, filed on Aug. 24, 2021, granted, now 11,824,569.
Claims priority of provisional application 63/072,522, filed on Aug. 31, 2020.
Claims priority of provisional application 63/072,594, filed on Aug. 31, 2020.
Prior Publication US 2023/0318646 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 1/10 (2006.01); H03F 3/24 (2006.01); H03H 7/01 (2006.01); H04M 1/02 (2006.01)
CPC H04B 1/1036 (2013.01) [H03F 3/245 (2013.01); H03H 7/0115 (2013.01); H04M 1/0202 (2013.01); H03F 2200/171 (2013.01); H04B 2001/1063 (2013.01); H04B 2001/1072 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio frequency system with tunable filtering, the radio frequency system comprising:
a power amplifier having an output;
a multi-throw switch;
a first tunable filter coupled between the output of the power amplifier and the multi-throw switch, the first tunable filter having at least two tunable notches to provide notch filtering in a signal path between the output of the power amplifier and the multi-throw switch;
an antenna switch coupled to the multi-throw switch by way of one or more radio frequency signal paths; and
a second tunable filter coupled between the antenna switch and an antenna node, the second tunable filter having at least one tunable notch, the one tunable notch of the second tunable filter being associated with a harmonic of a radio frequency signal at the output of the power amplifier, and the two tunable notches of the first tunable filter each being at a higher respective frequency than the one tunable notch of the second tunable filter.