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Asymmetric Doherty power amplifier based on high-power backoff

A power amplifier, asymmetric technology, applied in the direction of improving the amplifier to improve efficiency, etc., can solve the problem of high power consumption of the power amplifier, achieve saturated power, overcome large power consumption, and achieve high efficiency

Pending Publication Date: 2021-08-13
DALIAN MARITIME UNIVERSITY +1
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  • Description
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Problems solved by technology

[0005] The present invention provides an asymmetrical Doherty power amplifier based on high power back-off to overcome the problem of high power consumption of the power amplifier

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  • Asymmetric Doherty power amplifier based on high-power backoff
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  • Asymmetric Doherty power amplifier based on high-power backoff

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] This embodiment provides an asymmetrical Doherty power amplifier based on high power back-off, such as Figure 1-9 , including: power divider 1, carrier power amplifier phase compensation line 2, carrier power amplifier module 3, peak power amplifier module 4, post-matching network 5 and load impedance 6;

[0032] The output end of the pow...

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Abstract

The invention discloses an asymmetric Doherty power amplifier based on high-power backoff, and the power amplifier comprises a power divider, a carrier power amplifier phase compensation line, a carrier power amplifier module, a peak power amplifier module, a post-matching network and a load impedor; the output end of the post-matching network is connected with the load impedance through a stepped impedance conversion line structure, and the peak power amplifier module suppresses second harmonics; a peak power amplifier compensation line of a traditional post-matching Doherty power amplifier is omitted, saturation power and high efficiency of a peak power amplifier module are achieved, the problem that the power consumption of the power amplifier is large is further solved, the output end of the post-matching network is connected with the load impedance through a stepped impedance conversion line structure, and the Doherty power amplifier is simple in structure and easy to design.

Description

technical field [0001] The invention relates to the field of microwave power amplifiers, in particular to an asymmetrical Doherty power amplifier based on large power back-off. Background technique [0002] With the rapid development of modern wireless communication technology, the peak-to-average ratio of modulated signals is getting higher and higher. In this context, Doherty power amplifiers have attracted extensive attention and research because they can effectively improve the efficiency of back-off work. [0003] Due to the bandwidth limitation brought by the quarter-wavelength line of the traditional Doherty power amplifier, the designed Doherty power amplifier can only work in a narrow bandwidth range, which does not meet the broadband development of our current wireless communication technology need. In recent years, post-matching Doherty power amplifiers have been proposed. This post-matching Doherty power amplifier not only omits the traditional quarter-wavelengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/07
CPCH03F1/07
Inventor 房少军张珅刘宏梅宋春水王庆祥
Owner DALIAN MARITIME UNIVERSITY
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