Compact doherty combiner
AssigneeAnadigics, Inc.
InventorKenneth Sean Ozard
Life of this patent
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Abstract
A combiner coupled to output terminals of a Doherty amplifier, the combiner comprising an inverter circuit and a transformer circuit. The inverter circuit comprising at least a first network and a second network, wherein each of the first network and the second network includes lumped elements. The transformer circuit comprising at least a third network and a fourth network, wherein each of the first third and the fourth network includes the lumped elements, wherein the lumped elements are selected from the group of capacitors and inductors.
Claims17
A combiner for connection to the output terminals of a Doherty amplifier having a main amplifier and one or more peaking amplifiers, the combiner comprising:
- an inverter circuit comprising at least a first network and a second network, wherein each of the first network and the second network includes lumped elements, and
- a transformer circuit comprising at least a third network and a fourth network, wherein each of the third network and the fourth network includes the lumped elements, wherein the lumped elements are selected from a group of capacitors and inductors,
- wherein the first network includes:
- a first capacitor coupled in shunt between an output terminal of the main amplifier and a ground terminal;
- a second capacitor coupled in shunt between a first inductor and the ground terminal;
- and
- the first inductor connected to the first capacitor and the second capacitor;
- and
- wherein the second network includes:
- a third capacitor coupled in shunt between output terminals of the one or more peaking amplifiers and the ground terminal;
- the second capacitor coupled in shunt between a second inductor and the ground terminal;
- and
- the second inductor connected to the second capacitor and the third capacitor.
A Doherty combiner, wherein the Doherty combiner is connectable to output terminals of a Doherty amplifier comprising a main amplifier and one or more peaking amplifiers, the Doherty combiner comprising:
- an inverter circuit comprising:
- a first capacitor coupled in shunt between the output terminal of the main amplifier and a ground terminal,
- a second capacitor coupled in shunt between a first inductor and the ground terminal,
- the first inductor connected to the first capacitor and the second capacitor,
- a third capacitor coupled in shunt between the output terminals of the one or more peaking amplifiers and the ground terminal,
- and wherein the second capacitor is coupled in shunt between a second inductor and the ground terminal, and
- the second inductor connected to the second capacitor and the third capacitor;
- and
- a transformer circuit comprising:
- a fourth capacitor coupled in shunt between the output terminal of the main amplifier and a ground terminal,
- a fifth capacitor coupled in shunt between a third inductor and the ground terminal,
- the third inductor connected to the fourth capacitor and the fifth capacitor,
- a sixth capacitor coupled in shunt between the output terminals of the one or more peaking amplifiers and a ground terminal,
- the fifth capacitor coupled in shunt between a fourth inductor and the ground terminal, and
- the fourth inductor connected to the fifth capacitor and the sixth capacitor.
A Doherty combiner, wherein the Doherty combiner is connectable to output terminals of a Doherty amplifier comprising a main amplifier and one or more peaking amplifiers, the Doherty combiner comprising:
- an impedance inverter circuit receiving a signal from the main amplifier, the impedance inverter circuit comprising first lumped elements, wherein the first lumped elements are arranged such that the impedance inverter circuit exhibits a first predefined impedance with ninety degree phase shift;
- and
- a impedance transformer circuit receiving the signal from the main amplifier, wherein the impedance transformer circuit includes second lumped elements, the second lumped elements are arranged such that the impedance transformer circuit exhibits a second predefined impedance, and the first and second lumped elements are selected from a group of capacitors and inductors.
Dependencies are inferred from the claim text.