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US 2016/0254792 A1Published application
A doherty amplifier with additional delay element
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsLothar SCHENK, Uwe DALISDA
Life of this patent
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Abstract
An amplifier includes two amplifier circuits and a power splitter. The power splitter splits a signal to be amplified and generates a phase displacement of 90° in the case of a rated frequency between resulting partial signals. In this context, the amplifier circuits each amplify one of the partial signals or respectively a signal derived from one of the partial signals. The amplifier additionally contains a first delay element, which is arranged between the power splitter and one of the amplifier circuits.
Claims14
-11. (canceled)
An amplifier comprising:
- two amplifier circuits;
- and
- a power splitter,
- wherein:
- the power splitter is embodied to split a signal to be amplified and to generate a first phase displacement of approximately 90° between two resulting partial signals with a given rated frequency,
- the amplifier circuits are embodied, in each case, to amplify a signal derived from one of the partial signals,
- the amplifier contains at least one first delay element which is connected between the power splitter and one of the amplifier circuits, and
- the first delay element is embodied to charge one of the signals to be amplified by the amplifier circuits with an additional, second phase displacement.
5 more elements
The amplifier according to 20, wherein:
- the amplifier is configured to operate, at least at times, as a broadband amplifier,
- the switching elements are then configured to bridge the delay elements.
Dependencies are inferred from the claim text.