Circulator for full duplex communications
AssigneeQUALCOMM Incorporated
InventorsJuha Sakari Ella, Edgar Schmidhammer
Life of this patent
Estimating the term…
Abstract
An example circulator generally includes a plurality of branches. Each of the branches includes a first acoustic wave resonator and a second acoustic wave resonator coupled in series with the first acoustic wave resonator. Each of the branches further includes a first switching device and a second switching device. The first switching device is coupled in parallel with the first acoustic wave resonator. The second switching device is coupled in parallel with the second acoustic wave resonator.
Claims18
A circulator comprising:
- a plurality of branches, each of the plurality of branches comprising:
- a first acoustic wave resonator having a first series resonant frequency;
- a second acoustic wave resonator coupled in series with the first acoustic wave resonator, the second acoustic wave resonator having a second series resonant frequency that is different from the first series resonant frequency;
- a first switching device coupled in parallel with the first acoustic wave resonator;
- and
- a second switching device coupled in parallel with the second acoustic wave resonator.
A method for routing signals in an electronic device supporting wireless communication, comprising:
- routing a first signal from a transmit chain to an antenna using a circulator of the electronic device, the circulator comprising a plurality of branches, each of the plurality of branches comprising:
- (i) a first acoustic wave resonator having a first series resonant frequency, (ii) a second acoustic wave resonator coupled in series with the first acoustic wave resonator and having a second series resonant frequency that is different from the first series resonant frequency, (iii) a first switching device coupled in parallel with the first acoustic wave resonator, and (iv) a second switching device coupled in parallel with the second acoustic wave resonator, and
- routing a second signal from the antenna to a receive chain using the circulator.
An apparatus comprising:
- a transmit chain;
- a receive chain;
- an antenna;
- and
- a circulator comprising:
- a first port coupled to the transmit chain;
- a second port coupled to the antenna;
- a third port coupled to the receive chain;
- and
- a plurality of branches coupled between the first port, the second port, and the third port, each of the plurality of branches comprising:
- a first acoustic wave resonator having a first series resonant frequency;
- a second acoustic wave resonator coupled in series with the first acoustic wave resonator, the second acoustic wave resonator having a second series resonant frequency that is different from the first series resonant frequency;
- a first switching device coupled in parallel with the first acoustic wave resonator;
- and
- a second switching device coupled in parallel with the second acoustic wave resonator.
Dependencies are inferred from the claim text.