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Efficiency Optimized Doherty Amplifier

A technology for amplifiers and main amplifiers, applied to amplifiers, amplifier combinations, improved amplifiers to improve efficiency, etc., can solve problems such as reduced efficiency

Active Publication Date: 2016-11-16
ROHDE & SCHWARZ GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of the disclosed Doherty amplifier is that, due to the signal separation and tolerances of the individual amplifiers, optimal signal separation between the main and auxiliary amplifiers does not occur
This leads to less efficiency

Method used

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  • Efficiency Optimized Doherty Amplifier
  • Efficiency Optimized Doherty Amplifier
  • Efficiency Optimized Doherty Amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] First refer to Figures 1 to 3 Explain the technical problem to be solved by the present invention. The structure and function of various exemplary embodiments of amplifiers according to the present invention are subsequently referred to Figures 4 to 7 give. Descriptions and descriptions of the same elements in similar figures are not repeated in some instances.

[0017] figure 1 An exemplary Doherty amplifier is shown. The signal splitter 10 is connected to the main amplifier circuit 11 and the auxiliary amplifier circuit 12 . The main amplifier circuit 11 is further connected to a λ / 4 line 13 . The auxiliary amplifier circuit 12 and the λ / 4 line 13 are connected to another λ / 4 line 14 .

[0018] The input signal to be amplified is supplied to a signal splitter 10 . A signal splitter 10 splits it into a main amplifier signal and an auxiliary amplifier signal. The main amplifier signal and the auxiliary amplifier signal have a phase offset of 90° here. The mai...

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PUM

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Abstract

The amplifier includes a main amplifier circuit (41), an auxiliary amplifier circuit (42) and a signal generating device (40). The outputs of the main amplifier circuit (41) and the auxiliary amplifier circuit (42) are connected according to the Doherty principle. The signal generating device (40) is used for directly generating the main amplifier signal as the input signal of the main amplifier circuit (41) and directly generating the auxiliary amplifier signal as the input signal of the auxiliary amplifier circuit (42).

Description

technical field [0001] The present invention relates to an amplifier, especially a Doherty amplifier. Background technique [0002] A Doherty amplifier usually consists of two amplifier branches, a main amplifier and an auxiliary amplifier. The two outputs of the main amplifier and the auxiliary amplifier are combined via a λ / 4 wire in the main amplifier branch. [0003] Thus, the load impedances on the main and auxiliary amplifiers are dynamically changed, resulting in improved efficiency. In this case, the input signal to be amplified is supplied to the main and auxiliary amplifiers through a signal splitter. The phase shift of the split main and auxiliary amplifier input signals is 90°, so that the phase shift in the main amplifier branch is compensated by the necessary lambda / 4-wire conversion provided at the output. [0004] European patent EP1609239B1 discloses such a Doherty amplifier. A disadvantage of the disclosed Doherty amplifier is that, due to the signal se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02
CPCH03F1/0288H03F1/02H03F3/68
Inventor 乌韦·达利斯达彼得·米尔巴赫尔
Owner ROHDE & SCHWARZ GMBH & CO KG