US 11,996,822 B2
Wide bandwidth time division duplex transceiver
Russ Reisner, Oxnard, CA (US); Neal Fenzi, Santa Barbara, CA (US); Robert B. Hammond, Santa Barbara, CA (US); Patrick Turner, San Bruno, CA (US); and Bryant Garcia, Burlingame, CA (US)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by MURATA MANUFACTURING CO., LTD, Kyoto (JP)
Filed on Dec. 1, 2020, as Appl. No. 17/108,977.
Application 17/108,977 is a continuation in part of application No. 16/829,617, filed on Mar. 25, 2020, granted, now 10,868,512.
Application 16/829,617 is a continuation of application No. 16/578,811, filed on Sep. 23, 2019, granted, now 10,637,438.
Application 16/578,811 is a continuation in part of application No. 16/230,443, filed on Dec. 21, 2018, granted, now 10,491,192, issued on Nov. 26, 2019.
Claims priority of provisional application 62/753,815, filed on Oct. 31, 2018.
Claims priority of provisional application 62/748,883, filed on Oct. 22, 2018.
Claims priority of provisional application 62/741,702, filed on Oct. 5, 2018.
Claims priority of provisional application 62/701,363, filed on Jul. 20, 2018.
Claims priority of provisional application 62/685,825, filed on Jun. 15, 2018.
Prior Publication US 2021/0119603 A1, Apr. 22, 2021
Int. Cl. H03H 9/17 (2006.01); H03H 9/02 (2006.01); H03H 9/54 (2006.01); H03H 9/13 (2006.01)
CPC H03H 9/171 (2013.01) [H03H 9/02 (2013.01); H03H 9/54 (2013.01); H03H 9/02015 (2013.01); H03H 9/13 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A wide bandwidth time division duplex (TDD) transceiver comprising:
a transmitter;
a receiver;
a bandpass filter comprising a plurality of acoustic resonators including at least one shunt resonator and at least one series resonator; and
a transmit/receive switch configured to selectively connect a first port of the bandpass filter to either an output of the transmitter or an input of the receiver,
wherein each of the plurality of acoustic resonators is a transversely-excited film bulk acoustic resonator,
wherein each of the plurality of acoustic resonators comprises:
a piezoelectric layer, and
an interdigital transducer (IDT) with interleaved fingers on a surface of the piezoelectric laver, a thickness of the interleaved fingers of the IDT being greater than or equal to 0.85 times a thickness of the piezoelectric layer and less than or equal to 2.5 times the thickness of the piezoelectric layer.