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Power amplifier

A power amplifier and power amplification technology, applied in the field of communication, can solve problems such as inefficiency, phase, amplitude and/or power ratio difference, manual adjustment, etc., to achieve the effects of improving production efficiency, improving yield and improving efficiency

Inactive Publication Date: 2013-03-06
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

However, due to limitations such as PCB production process, lumped component tolerance (lumped component tolerance) and transistor technology itself, it often results in phase, amplitude and / or power ratio differences between the multi-channel power that needs to be synthesized in the amplifier device. rate, manual adjustment is often required in the production process, which is undoubtedly very inefficient

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] In the present invention, the power amplifier includes multiple power amplification paths, wherein each power amplification path includes at least one amplifier, and at least one of the multiple power amplification paths includes at least one adjustable phase shifter.

[0028] Such as figure 1 As shown, the power amplifier includes two power amplification paths, wherein the first power amplification path includes an adjustable phase shifter C1 and an amplifier G1, and the second power amplification path includes an amplifier G2. Wherein, the adjustable phase shifter C1 can be realized in various ways, for example, through a microstrip, a coupled microstrip, a lumped inductor, a capacitor and a resistor, and a hybrid coupler, chip etc., and digital or analog adjustable phase shifters are all included in the scope of the adjustable phase shifter of the ...

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Abstract

The invention provides a power amplifier comprising a plurality of power amplifying paths. Each power amplifying path comprises at least one amplifier, and at least one of the power amplifying paths is provided with at least one adjustable phase shifter. Compared with the prior art, the power amplifier has the advantages that phase error among the power amplifying paths is reduced by arranging the phase shifters on at least one of the power amplifying paths, affection resulted from production factors and devices themselves is greatly reduced, power synthesis efficiency is improved and yield rate of the power amplifier is increased.

Description

technical field [0001] The present invention relates to the communication field, in particular to a power amplifier. Background technique [0002] The power amplifier is an important link in the wireless base station system. In order to realize high-speed wireless transmission services while widening wireless signal coverage, power amplifiers require high transmit power. Especially new communication standards such as WCDMA, LTE, etc., especially require high power output. Moreover, the modulation method of the existing new communication standard is not the traditional constant envelope modulation, but a modulation method such as OFDM, which makes the power output device require higher power output. Due to the limitations of existing technologies, it is difficult for a single transistor to output such a high power. Therefore, power combining technologies, such as push-pull technology and class AB balancing technology, are currently widely used in Doherty (Doherty) in existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
Inventor 欧阳溢波戴仁彬汤超张云烽周进张朋举
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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