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US 9,438,174 B2Granted
Quasi-broadband amplifier according to the Doherty principle
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsSebastian Stempfl, Bernhard Kaehs, Uwe Dalisda, Lothar Schenk
Life of this patent
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Abstract
An amplifier comprises a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination. The hybrid-coupler circuit comprises an output port and an isolation port. The termination in this context is connected to the isolation port of the hybrid-coupler circuit. The termination comprises a first switch, a first capacitor and a first inductance.
Claims13
An amplifier comprising:
- a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination,
- wherein the hybrid-coupler circuit includes an output port and an isolation port, and
- wherein the termination is connected to the isolation port of the hybrid-coupler circuit, and
- wherein the termination includes a first switch, and a first capacitor and a first inductance, and
- wherein the first switch selectively connects the first capacitor to the first inductance.
2 more elements
An amplifier comprising:
- a first amplifier circuit, a second amplifier circuit, a hybrid-coupler circuit and a termination,
- wherein the hybrid-coupler circuit includes an output port and an isolation port,
- wherein the termination is connected to the isolation port of the hybrid-coupler circuit,
- wherein the termination includes a first ohmic resistor, a second ohmic resistor, a first capacitor, a first inductance and a second inductance,
- wherein the first capacitor and the first inductance are connected to the isolation port, and
- wherein the second inductance is connected to a terminal of the first capacitor remote from the isolation port,
- wherein the first ohmic resistor is connected in series to the first inductance, and the second ohmic resistor is connected in series to the second inductance.
4 more elements
An amplifier comprising:
- a first amplifier circuit, a second amplifier circuit, a first hybrid-coupler circuit and a termination,
- wherein the first hybrid-coupler circuit includes an output port and an isolation port,
- wherein the termination is connected to the isolation port of the first hybrid-coupler circuit,
- wherein the termination includes a second hybrid-coupler circuit, and
- wherein the second hybrid-coupler circuit is terminated at its isolation port with a first capacitor, and the second hybrid-coupler circuit is terminated at one output port with a second capacitor.
2 more elements
Dependencies are inferred from the claim text.