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Ultra wideband doherty amplifier

A technology of Doherty amplifier and main amplifier, which is applied in amplifiers, high-frequency amplifiers, radio frequency amplifiers, etc., and can solve problems such as consumption, large time and resources, and low efficiency in power consumption

Active Publication Date: 2015-11-11
AMPLEON NETHERLANDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to cover the entire frequency band, a large number of different amplifiers must be implemented, which consumes a lot of time and resources, and is inefficient in terms of power consumption

Method used

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Examples

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Embodiment Construction

[0056] figure 1 is a schematic diagram of the circuitry of the Doherty amplifier 100 according to some embodiments. Doherty amplifier 100 includes an input circuit 102 , an amplifier stage 104 and an output circuit 106 .

[0057] Input circuit 102 receives an input RF signal and divides it into split signals that are provided to amplifier stage 104 . The split signals are inverses of each other and are reduced in power compared to the input signal. At least the input signal is split into a first signal and a second signal. In some examples, a third signal may be split from the input signal.

[0058] Amplifier stage 104 amplifies the split signal and provides the amplified signal to output circuit 106 .

[0059] Output circuit 106 combines the amplified signals to form an amplified output signal, which is provided to output load 108 . The input circuit 102 and the output circuit 106 operate to ensure that the first amplified signal and the second amplified signal are in ph...

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PUM

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Abstract

A Doherty amplifier (100) for amplifying an input signal to an output signal, the Doherty amplifier (100) comprising: a main amplifier (110) for receiving a first signal and for amplifying the first signal to generate a first amplified signal; a first peak amplifier (112) for receiving a second signal and for generating a second amplified signal, the first peak amplifier (112) only operating when the second signal has reached a first threshold power, the first and second signal split from the input signal; and output circuitry (106) to combine the first and second amplified signals to generate an output signal having an operating bandwidth, the output circuitry (106) comprising inductors (124, 126) arranged in the format of a branch line coupler, the inductors (124, 126) coupled to the output parasitic capacitances of the main (110) and peak amplifier (112).

Description

technical field [0001] The present invention relates to a Doherty amplifier, in particular but not exclusively, the present invention relates to a Doherty amplifier capable of amplifying signals in a wider operating frequency band. Background technique [0002] Modulated radio frequency (RF) signals are used in a variety of communication systems, such as mobile phones, cellular base stations for mobile phones, and satellite communications. Once the RF signal is received, the RF signal is amplified before being processed. [0003] During normal operation, conventional amplifiers have a generally linear relationship between input power and efficiency, and between input power and output power. As input power increases, both efficiency and output power increase. This means that higher input power is required before high efficiency can be achieved. Eventually, the amplifier is driven into saturation, where the relationship between input power and output power is nonlinear. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/07H03F1/42
CPCH03F1/0288H03F3/19H03F2200/301H03F2200/36H03F2200/451H04W88/08
Inventor 艾克斯威尔·布鲁诺·让·莫诺瓦让-雅克·博尼杰拉德·简-路易斯·布伊斯
Owner AMPLEON NETHERLANDS
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