US 12,255,637 B2
5.1-7.1GHz Wi-Fi6E coexistence acoustic wave resonator RF diplexer circuit
Saurabh Gupta, Mooresville, NC (US); Guillermo Moreno Granado, Huntersville, NC (US); Rohan W. Houlden, Oak Ridge, NC (US); David M. Aichele, Huntersville, NC (US); Jeffrey B. Shealy, Davidson, NC (US); and Bradford R. Bersin, Cornelius, NC (US)
Assigned to Akoustis, Inc., Huntersville, NC (US)
Filed by Akoustis, Inc., Huntersville, NC (US)
Filed on Dec. 30, 2021, as Appl. No. 17/566,038.
Application 17/566,038 is a continuation in part of application No. 17/151,552, filed on Jan. 18, 2021, granted, now 11,901,880.
Prior Publication US 2022/0231666 A1, Jul. 21, 2022
Int. Cl. H03H 9/70 (2006.01); H03H 9/00 (2006.01); H03H 9/13 (2006.01); H03H 9/205 (2006.01); H03H 9/56 (2006.01)
CPC H03H 9/706 (2013.01) [H03H 9/0095 (2013.01); H03H 9/13 (2013.01); H03H 9/205 (2013.01); H03H 9/56 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An RF diplexer device, the device comprising:
a first filter circuit configured to receive a first input signal and to produce a first filtered signal;
a second filter circuit configured to receive a second input signal 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 plurality of series 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;
wherein the first filter circuit has a first circuit response configured from the serial configuration of the first filter circuit and the parallel configuration of the first filter circuit to achieve a first transmission loss from a first pass band having a first characteristic frequency centered around 5.4925 GHz and having a bandwidth from 5.150 GHz to 5.835 GHz; and
wherein the second filter circuit has a second circuit response configured from the serial configuration of the second filter circuit and the parallel configuration of the second filter circuit to achieve a second transmission loss from a second pass band having a second characteristic frequency centered around 6.535 GHz and having a bandwidth from 5.945 GHz to 7.125 GHz; and
a multiplexer coupled to the first filter circuit and the second filter circuit and configured to select between the first filtered signal and the second filtered signal,
wherein the first filter circuit comprises a maximum insertion loss of 3.0 dB within the first pass band, a maximum amplitude variation characterizing the pass-band of less than 2.0 dB, and a minimum return loss characterizing the pass-band of 10 dB; and
wherein the second filter circuit comprises a maximum insertion loss of 3.0 dB within the second pass band, a maximum amplitude variation characterizing the pass-band of 2.0 dB, and a minimum return loss characterizing the pass-band of 10 dB; and
wherein the RF diplexer device has an operating temperature ranging from −40 Degrees Celsius to 85 Degrees Celsius, a microwave characteristic impedance of 50 Ohms, a maximum power handling capability within the pass-band of +30 dBm or 1 Watt.