US 12,451,858 B2
Reducing impedance matching components in front end architectures for multi-band transmit and receive functions
Jiunn-Sheng Guo, Eastvale, CA (US); Tianming Chen, Newbury Park, CA (US); Joji Fujiwara, Suita (JP); Russ Alan Reisner, Oxnard, CA (US); and Nobuyuki Tsujimoto, Osaka (JP)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Nov. 18, 2022, as Appl. No. 17/990,595.
Claims priority of provisional application 63/281,365, filed on Nov. 19, 2021.
Prior Publication US 2023/0163745 A1, May 25, 2023
Int. Cl. H03H 7/38 (2006.01); H04B 1/50 (2006.01); H04L 5/14 (2006.01)
CPC H03H 7/38 (2013.01) [H04B 1/50 (2013.01); H04L 5/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A front end architecture comprising:
a plurality of duplexers, each duplexer of the plurality of duplexers comprising a phase or impedance rotation element and configured to filter signals within a particular frequency range;
an antenna switch module coupled to the plurality of duplexers and configured to direct signals between an antenna and the plurality of duplexers;
a single shunt inductor between the antenna switch module and the antenna, the single shunt inductor configured to provide impedance matching to the plurality of duplexers without use of additional shunt inductors between the plurality of duplexers and the antenna switch module;
a first low noise amplifier (LNA) switch coupled to the plurality of duplexers;
an LNA inductor coupled to the first LNA switch; and
a second LNA switch coupled to a plurality of low noise amplifiers and coupled to the LNA inductor such that the LNA inductor is coupled in series between the first LNA switch and the second LNA switch to provide impedance matching to receive signals passed from the plurality of duplexers to the first LNA switch.