Harmonic control based efficient Doherty power amplifier

A power amplifier and harmonic control technology, applied in the field of radio frequency communication, can solve the problem that the improvement of harmonic control efficiency is not considered, only the fundamental wave matching is considered, the maximum saturation efficiency and back-off efficiency of Doherty power amplifier can only reach 78.5 % and other problems to achieve the effect of low switching voltage

Active Publication Date: 2016-08-24
HANGZHOU DIANZI UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional Doherty power amplifier carrier power amplifier is biased in class AB working mode, and the peak power amplifier is biased in class C working mode, so the maximum saturation efficiency and fallback efficiency of traditional Doherty power amplifier can only reach 78.5%.
At the same time, t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Harmonic control based efficient Doherty power amplifier
  • Harmonic control based efficient Doherty power amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] In view of the defects existing in the prior art, the applicant conducted in-depth research on the structure of the Doherty power amplifier in the prior art, and the applicant found that the carrier power amplifier bias of the Doherty power amplifier in the prior art is a Class AB working mode, and the peak power amplifier bias In the class C working mode, and only considering the influence of the fundamental wave matching on the efficiency, the maximum saturation efficiency and fallback efficiency of the traditional Doherty power amplifier can only reach a maximum of 78.5%.

[0023] In order to overcome the defects of the prior art, the application adopts the class E power amplifier to replace the traditional class AB pow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides a harmonic control based efficient Doherty power amplifier. The harmonic control based efficient Doherty power amplifier includes an equal Wilkinson power splitter, a carrier power amplification circuit, a peak power amplification circuit, and a load modulation network. The equal Wilkinson power splitter is used for equally dividing an input power and then outputting the equally divided input power to the carrier power amplification circuit and the peak power amplification circuit. The output end of the carrier power amplification circuit and the output end of the peak power amplification circuit are connected with the load modulation network. The load modulation network outputs the power to a load. Compared with the prior art, a harmonic control circuit is used in an class E power amplifier to control a high-order harmonic, a load impedance is converted to a required fundamental wave impedance by a harmonic control network, an open circuit is on odd harmonic frequency, and short circuit is on even-number harmonic frequency, so that waveform shaping is realized, theoretically, a power amplification transistor has no power loss, and ideal drain efficiency of the power amplifier can reach 100%.

Description

technical field [0001] The invention relates to the technical field of radio frequency communication, in particular to a high-efficiency Doherty power amplifier based on harmonic control. Background technique [0002] In recent years, wireless communication technology has been greatly developed, and the modulation methods are becoming more and more complex. The power amplifier, as the final module in the transmitter, is the component with the largest power consumption in the entire radio frequency system. Its main function is to amplify the power of the signal output by the previous stage, and then send the amplified signal to the antenna for transmission. Since the power amplifier consumes a lot of DC power, the efficiency is the first important index to be considered in the design of the power amplifier, and the linearity is also a key index of the power amplifier. This is mainly reflected in the following aspects: (1) The linearity of the power amplifier. Since the late...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H03F1/07H03F3/19H03F3/217H03F3/24
CPCH03F1/07H03F3/19H03F3/217H03F3/2176H03F3/245
Inventor 程知群张明李江舟刘国华董志华柯华杰周涛
Owner HANGZHOU DIANZI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap