US 12,476,611 B2
Reduction of on-die parasitic capacitance for 5G filter design with high isolation
Hai H. Ta, San Diego, CA (US); Shihan Qin, Fresno, CA (US); Nicholas Quinn Muhlmeyer, Newbury Park, CA (US); and Weimin Sun, Santa Rosa Valley, CA (US)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Mar. 23, 2023, as Appl. No. 18/125,280.
Claims priority of provisional application 63/326,563, filed on Apr. 1, 2022.
Prior Publication US 2023/0318568 A1, Oct. 5, 2023
Int. Cl. H03H 9/54 (2006.01); H04B 1/00 (2006.01)
CPC H03H 9/542 (2013.01) [H04B 1/0057 (2013.01)] 20 Claims
OG exemplary drawing
 
6. A diplexer comprising:
a first acoustic wave filter connected between an antenna port and a first filter port, the first acoustic wave filter including one or more bulk acoustic wave resonators;
a second acoustic wave filter connected between the antenna port and a second filter port, the second acoustic wave filter including one or more bulk acoustic wave resonators;
a metallic guard ring extending around the first and second acoustic wave filters and about the antenna port, first filter port, and second filter port; and
one or more ground pins connected between the antenna port and the first and second filter ports, at least one of the one or more ground pins being further connected to the metallic guard ring.