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US 2024/0195381 A1Published application
Acoustic filters with improved return loss
AssigneeQorvo US, Inc.
InventorsKelly M. Lear, Nikolaus Klemmer, Jeffery Galipeau, Chris Levesque
Life of this patent
Estimating the term…
Abstract
Embodiments of an acoustic filter are disclosed. In some embodiments, a bandpass filter is included in a passband signal path, the passband signal path is connected between a first terminal and a second terminal. A first bandstop filter is located in a first stopband signal path, the first stopband signal path connected at the first terminal. Additionally, a second bandstop filter is located in a second stopband signal path, the second stopband signal path is connected at the second terminal.
Claims31
An acoustic filter, comprising:
- a bandpass filter in a passband signal path, the passband signal path connected between a first terminal and a second terminal;
- a first bandstop filter in a first stopband signal path, the first stopband signal path connected at the first terminal;
- and
- a second bandstop filter in a second stopband signal path, the second stopband signal path connected at the second terminal.
1 more element
An acoustic filter, comprising:
- at least one bandpass filter in a passband signal path, the passband signal path connected between a first terminal and a second terminal;
- at least one first bandstop filter in a first stopband signal path, the first stopband signal path connected at the first terminal;
- and
- at least one second bandstop filter in a second stopband signal path, the second stopband signal path connected at the second terminal.
1 more element
An acoustic filter, comprising:
- a bandpass filter connected between a first terminal and a second terminal, the bandpass filter comprising a first acoustic resonator and a second acoustic resonator, the first acoustic resonator connected in shunt to the second acoustic resonator;
- a first bandstop filter connected at the first terminal, the first bandstop filter comprising a third acoustic resonator and a fourth acoustic resonator, the third acoustic resonator connected in shunt to the fourth acoustic resonator;
- and
- a second bandstop filter connected at the second terminal, the second bandstop filter comprising a fifth acoustic resonator and a sixth acoustic resonator, the fifth acoustic resonator connected in shunt to the sixth acoustic resonator.
1 more element
An acoustic filter, comprising:
- a bandpass filter connected between a first terminal and a second terminal, the bandpass filter comprising a first acoustic resonator and a second acoustic resonator, the second acoustic resonator connected between a first terminal of the first acoustic resonator and a reference terminal;
- a first bandstop filter connected at the first terminal, the first bandstop filter comprising a third acoustic resonator and a fourth acoustic resonator, the fourth acoustic resonator connected between a second terminal of the third acoustic resonator and the reference terminal;
- and
- a second bandstop filter connected at the second terminal, the second bandstop filter comprising a fifth acoustic resonator and a sixth acoustic resonator, the sixth acoustic resonator connected between a third terminal of the fifth acoustic resonator and the reference terminal.
1 more element
An acoustic filter, comprising:
- a passband signal path connected between a first terminal and a second terminal, the passband signal path comprising a first acoustic resonator and a second acoustic resonator, the second acoustic resonator connected between a first terminal of the first acoustic resonator and a reference terminal;
- a first stopband signal path connected at the first terminal, the first stopband signal path comprising a third acoustic resonator and a fourth acoustic resonator, the fourth acoustic resonator connected between a second terminal of the third acoustic resonator and the reference terminal;
- and
- a second stopband signal path connected at the second terminal, the second stopband signal path comprising a fifth acoustic resonator and a sixth acoustic resonator, the sixth acoustic resonator connected between a third terminal of the fifth acoustic resonator and the reference terminal.
1 more element
An acoustic filter, comprising:
- a passband signal path connected between a first terminal and a second terminal, the passband signal path comprising a bandpass filter;
- a first stopband signal path connected at the first terminal, the first stopband signal path comprising a first bandstop filter;
- a second stopband signal path connected at the second terminal, the second stopband signal path comprising a second bandstop filter;
- a first termination resistor connected between the first bandstop filter and a reference terminal;
- and
- a second termination resistor connected between the second bandstop filter and the reference terminal.
3 more elements
Dependencies are inferred from the claim text.