Patent ID: 11901880
Assignee: AKOUSTIS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. An RF diplexer device, the device comprising:
a first input inductor;
a first filter circuit coupled to the first input inductor, the first filter circuit configured to receive a first input signal over the first input inductor and to produce a first filtered signal;
a second input inductor;
a second filter circuit coupled to the second input inductor, the second filter circuit configured to receive a second input signal over the second input inductor and to produce a second filtered signal;
wherein each of the first and second filter circuits comprises a plurality of series resonators and a plurality of shunt resonators;
wherein each of the resonators comprises
a substrate member having a cavity region and an upper surface region contiguous with an opening of the cavity region,
a bottom electrode within a portion of the cavity region,
a piezoelectric material overlying the upper surface region and the bottom electrode,
a top electrode overlying the piezoelectric material and overlying the bottom electrode, and
an insulating material overlying the top electrode;
a first output inductor coupled to the first filter circuit;
a second output inductor coupled to the second filter circuit; and
a third output inductor coupled to the first and second output inductors;
wherein the third output inductors is configured to receive the first filtered signal over the first output inductor and to receive the second filtered signal over the second output inductor, wherein each of the first filter circuit and the second filter circuit is configured as a bulk acoustic wave (BAW) filter device;
wherein each of the plurality of series resonators is a BAW resonator; and
wherein each of the plurality of shunt resonators is a BAW resonator.