Power amplifier and radio frequency device comprising same

A technology for power amplifiers and carrier amplifiers, applied in amplifiers, improved amplifiers to improve efficiency, amplifier types, etc., can solve problems such as maintaining high efficiency, achieve the effects of reducing power leakage and enhancing back-off efficiency

Pending Publication Date: 2020-08-14
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with increasing PAPR, it is difficult for classical Doherty PAs to mainta

Method used

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  • Power amplifier and radio frequency device comprising same
  • Power amplifier and radio frequency device comprising same
  • Power amplifier and radio frequency device comprising same

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[0039] For illustrative purposes, details are set forth in the following description to provide a thorough understanding of the disclosed embodiments. However, it is obvious to those skilled in the art that the embodiments can be implemented without these specific details or with equivalent arrangements.

[0040] As mentioned above, the off-state impedance of the peak amplifier is an important parameter that can affect the power added efficiency (PAE) of the inverted asymmetric Doherty PA. However, the current amplifier topology can only maintain a moderate peak amplifier off-state impedance for high-power applications, because their traditional configuration limits the further enhancement of the peak off-state impedance. Since the impedance is lower than the expected peak path disconnection state, it may impair the carrier / main amplifier backoff efficiency.

[0041] Specifically, for figure 1 In the existing solution shown, in order to achieve an enhanced peak off-state impedance...

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Abstract

A power amplifier is disclosed for amplifying an input signal and providing an amplified signal to a load at a junction node. The power amplifier comprises a splitter network, a carrier amplifier pathand a peaking amplifier path. The peaking amplifier path comprises a first impedance transformer coupled between a peaking output matching network and the junction node to enhance the off-state impedance of the peaking amplifier. The carrier amplifier path comprises a second impedance transformer coupled between a carrier output matching network and the junction node.

Description

technical field [0001] Embodiments of the present disclosure relate generally to the field of electronic components, and more particularly, to power amplifiers and radio frequency devices including power amplifiers. Background technique [0002] This section introduces aspects that may facilitate a better understanding of the disclosure. Accordingly, the statements in this section should be read in this light and should not be construed as an admission of what exists in the prior art or of what does not exist in the prior art. [0003] In 4G and beyond cellular base stations, advanced digital modulation schemes are used for high spectral efficiency. The corresponding radio frequency (RF) signal exhibits a large peak-to-average power ratio (PAPR), which is simultaneously amplified in a power amplifier (PA). Therefore, the instantaneous transmit power will vary strongly and rapidly. Due to the high PAPR excitation, conventional RF PAs will suffer from very low average effic...

Claims

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Application Information

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IPC IPC(8): H03F1/07
CPCH03F1/0288H03F3/245H03F1/56H03F2200/222H03F2200/387H03F2200/451H03F2200/321H04B1/0458H03F3/211H04B1/04H04B1/40H04B2001/0416H04W88/08
Inventor 王占仓颜丹
Owner TELEFON AB LM ERICSSON (PUBL)
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