US 11,838,007 B2
Multiplexer including acoustic wave filter with transmission line between resonators
Tomoya Komatsu, Irvine, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Dec. 22, 2020, as Appl. No. 17/130,558.
Application 17/130,558 is a continuation of application No. 16/988,417, filed on Aug. 7, 2020, granted, now 11,411,552.
Claims priority of provisional application 62/884,619, filed on Aug. 8, 2019.
Claims priority of provisional application 62/884,621, filed on Aug. 8, 2019.
Prior Publication US 2021/0111705 A1, Apr. 15, 2021
Int. Cl. H03H 9/72 (2006.01); H03H 9/56 (2006.01); H03H 9/70 (2006.01); H03F 3/19 (2006.01); H04B 1/40 (2015.01); H03H 9/64 (2006.01)
CPC H03H 9/72 (2013.01) [H03F 3/19 (2013.01); H03H 9/568 (2013.01); H03H 9/6483 (2013.01); H03H 9/703 (2013.01); H04B 1/40 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multiplexer for filtering radio frequency signals, the multiplexer comprising:
a first acoustic wave filter having a pass band;
a second acoustic wave filter coupled to the first acoustic wave filter at a common node, the second acoustic wave filter including a first acoustic resonator on a first die and a second acoustic resonator on a second die, the second acoustic resonator having a high impedance at the pass band of the first acoustic wave filter, the second acoustic resonator being electrically connected to the first acoustic resonator via a transmission line, and the first acoustic resonator being a same type of acoustic resonator as the second acoustic resonator; and
a third acoustic resonator on the second die, and the third acoustic resonator is a shunt resonator.