Doherty power amplifier

A technology of power amplifier and broadband power amplification, applied in the field of communication, can solve the problem that the Doherty power amplifier is difficult to achieve high-efficiency working state in multiple frequency bands, and achieve the effect of easy broadband, high efficiency and simple realization.

Active Publication Date: 2011-08-03
HUAWEI TECH CO LTD
View PDF7 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a Doherty power amplifier to solve the problem that the Doherty power amplifier in the prior art is difficult to achieve high-efficiency working conditions in multiple frequency bands at the same time, and proposes a Doherty power amplifier that can simultaneously meet high-efficiency working conditions in multiple frequency bands. power amplifier

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
  • Doherty power amplifier
  • Doherty power amplifier
  • Doherty power amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0094] The nonlinear phase network in the Doherty power amplifier provided in Embodiment 2 of the present invention may be composed of a distributed parameter network and / or a lumped parameter network. Wherein, the distributed parameter network may include a transmission line network, and the lumped parameter network may include an inductor-capacitor resonant network. Specifically, the transmission line can be equivalently changed into a capacitance value and an inductance value. For example, assuming that the impedance of the nonlinear phase network is ZL and the impedance of the transmission line is Z2, the equivalent relationship between the terminal short-circuit transmission line and the inductance L connected in parallel to the ground conforms to the formula (2 -1):

[0095] ZL = jZ 2 · tan ( 2 π λ · L ...

example 1

[0100] Example 1, then the transmission line network may include at least two transmission lines TL0, one end of the parallel connection of the at least two transmission lines TL0 is connected to the isolated end of the broadband combining bridge 25, and the other end of the at least two transmission lines TL0 is open or short circuit, Figure 4a Shown is a schematic diagram of two open transmission lines in the Doherty power amplifier provided by Embodiment 2 of the present invention, Figure 4b Shown is a schematic diagram of a short circuit between two transmission lines in the Doherty power amplifier provided by Embodiment 2 of the present invention, Figure 4c Shown is a schematic diagram of one short-circuit and one open-circuit transmission line in the Doherty power amplifier provided by Embodiment 2 of the present invention.

example 2

[0101] Example 2: The transmission line network includes a first transmission line TL1, a second transmission line TL2, and a third transmission line TL3, and one end of the parallel connection of the second transmission line TL2 and the third transmission line TL3 is connected to the broadband combining bridge through the first transmission line TL1 25, the second transmission line TL2 and the third transmission line TL3 are open or short-circuited, Figure 5a Shown is a schematic diagram of a network of three transmission lines in the Doherty power amplifier provided in Embodiment 2 of the present invention, the second transmission line TL2 and the third transmission line TL3 are respectively open; Figure 5b Shown is another schematic diagram of the three transmission line networks in the Doherty power amplifier provided in Embodiment 2 of the present invention, the second transmission line TL2 and the third transmission line TL3 are short-circuited; Figure 5c Shown is ano...

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 invention discloses a Doherty power amplifier which comprises a wideband shunt, a wideband power amplifying circuit, a wideband combining electric bridge and a nonlinear phase network, wherein the wideband power amplifying circuit comprises a wideband main power amplifier and a wideband auxiliary power amplifier; the wideband shunt is respectively connected with the input end of the wideband main power amplifier and the input end of the wideband auxiliary power amplifier, the output end of the wideband main power amplifier and the output end of the wideband auxiliary power amplifier are respectively connected with the input end of the wideband combing electric bridge, the isolation end of the wideband combining electric bridge is connected with the nonlinear phase network, and the output end of the wideband combining electric bridge is used for connecting with a load; and the nonlinear phase network is used for regulating a reflection phase angle of the isolation end of the wideband combining electric bridge at more than one working frequency band of the Doherty power amplifier. The Doherty power amplifier can reach an optimal working state at a plurality of working frequency band and has high wideband efficiency.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a Doherty power amplifier. Background technique [0002] In order to improve the utilization rate of the limited frequency bandwidth, modern communication technology adopts peak average ratio (PAR) complex modulation signal. The PAR complex modulation signal has amplitude information, and a linear power amplifier is required, and the linear power amplifier must meet the peak If the power is not compressed, it needs to be used back (Back off). The efficiency of conventional Class AB (Class AB) power amplifiers is reduced after the fallback, and it is difficult to meet the requirements of system power consumption, volume, and heat dissipation. Compared with ordinary Class AB power amplifiers, Doherty power amplifiers are characterized by maintaining high efficiency under back-off power, and are suitable for high-efficiency amplification of signal...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/07
CPCH03F1/0288
Inventor 苏永革焦留彦王来清杨磊张顺忠
Owner HUAWEI TECH CO LTD
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