Xiao Lan Zhang

US Patent:

20210313947, Oct 7, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222826

Inventors:

- Irvine CA, US
Li CHEN - Irvine CA, US
William J. DOMINO - Yorba Linda CA, US
Stephane Richard Marie WLOCZYSIAK - Irvine CA, US
Xiao ZHANG - Irvine CA, US

International Classification:

H03H 3/08
H03H 1/00

Abstract:

A half-bride combiner can be implemented as a coupling circuit having a common node and configured to couple the common node to one of first and second groups of filters through a first path and to couple the common node to the other group through a second path. The coupling circuit can be further configured such that the impedance provided by each filter of the one of the first and second groups for a signal in each band of the other group results in the signal being sufficiently excluded from the first path.

US Patent:

20210314007, Oct 7, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222822

Inventors:

- Irvine CA, US
Li CHEN - Irvine CA, US
William J. DOMINO - Yorba Linda CA, US
Stephane Richard Marie WLOCZYSIAK - Irvine CA, US
Xiao ZHANG - Irvine CA, US

International Classification:

H04B 1/00
H04B 1/18

Abstract:

A coupling circuit can be configured to couple a common node to a first group of filters through a first path and to couple the common node to a second group of one or more filters through a second path. The coupling circuit can be configured such that an impedance provided by each filter of the first group for a signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that an impedance provided by each filter of the second group for a signal in each band of the first group results in the signal being sufficiently excluded from the second path. The first path can present a first impedance to the coupling circuit, and the second path can present a second impedance to the coupling circuit, such that complex part of the first impedance is a conjugate of complex part of the second impedance.

US Patent:

20210314014, Oct 7, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222823

Inventors:

- Irvine CA, US
Li CHEN - Irvine CA, US
William J. DOMINO - Yorba Linda CA, US
Stephane Richard Marie WLOCZYSIAK - Irvine CA, US
Xiao ZHANG - Irvine CA, US

International Classification:

H04B 1/40

Abstract:

An architecture can include a first group of filters each configured to support a band such that a first frequency range covers the respective bands, and a second group of one or more filters each configured to support a band such that a second frequency range covers the respective one or more bands. Each filter of the first group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the second group, and each filter of the second group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the first group. The filters of the first and second groups can be implemented as one or more multiplexers. The architecture can further include a coupling circuit having a common node and configured to couple the common node to the one or more multiplexers through a first path and a second path. The coupling circuit can be further configured such that the impedance provided by each filter of the first group for the signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that the impedance provided by each filter of the second group for the signal in each band of the first group results in the signal being sufficiently excluded from the second path.

US Patent:

20210314015, Oct 7, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222824

Inventors:

- Irvine CA, US
Li CHEN - Irvine CA, US
William J. DOMINO - Yorba Linda CA, US
Stephane Richard Marie WLOCZYSIAK - Irvine CA, US
Xiao ZHANG - Irvine CA, US

International Classification:

H04B 1/40

Abstract:

A bridge combiner can be implemented as a coupling circuit that includes a common node and configured to couple the common node to a first group of filters through a first path and to couple the common node to a second group of one or more filters through a second path. The coupling circuit can include a resonator such that an impedance provided by each filter of the first group for a signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that an impedance provided by each filter of the second group for a signal in each band of the first group results in the signal being sufficiently excluded from the second path.

US Patent:

20210314016, Oct 7, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222825

Inventors:

- Irvine CA, US
Li CHEN - Irvine CA, US
William J. DOMINO - Yorba Linda CA, US
Stephane Richard Marie WLOCZYSIAK - Irvine CA, US
Xiao ZHANG - Irvine CA, US

International Classification:

H04B 1/40

Abstract:

A switching circuit can be provided for a coupling circuit having a common node and configured to couple the common node to a first group of filters through a first path and to couple the common node to a second group of one or more filters through a second path. The coupling circuit can be further configured such that an impedance provided by each filter of the first group for a signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that an impedance provided by each filter of the second group for a signal in each band of the first group results in the signal being sufficiently excluded from the second path. The switching circuit can be configured to provide a filter selection functionality along either or both of the first and second paths.

US Patent:

20210028765, Jan 28, 2021

Filed:

Oct 9, 2020

Appl. No.:

17/066947

Inventors:

- Singapore, SG
Nan Wu - Irvine CA, US
Xiao Zhang - Irvine CA, US

International Classification:

H03H 9/56
H03H 9/00
H03H 9/02
H03H 9/17
H03H 9/70

Abstract:

A ladder filter comprises a plurality of series arm bulk acoustic wave resonators electrically connected in series between an input port and an output port of the ladder filter and a plurality of shunt bulk acoustic wave resonators electrically connected in parallel between adjacent ones of the plurality of series arm bulk acoustic wave resonators and ground, at least one of the plurality of shunt bulk acoustic wave resonators including raised frame regions having a first width, at least one of the plurality of series arm bulk acoustic wave resonators having one of raised frame regions having a second width less than the first width or lacking raised frame regions.