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Novel combined broadband Doherty power amplifier and design method thereof

A technology for power amplifiers and amplifiers, which is applied in the direction of amplifiers, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., can solve the problem of high requirements for the main and auxiliary power amplifier matching circuits by the dual impedance matching method, and achieve the expansion of working bandwidth. Reduce the Impedance Transformation Ratio and Simplify the Effect of Real Frequency Technology

Pending Publication Date: 2020-04-17
HANGZHOU DIANZI UNIV FUYANG ELECTRONIC INFORMATION RES INST CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the dual impedance matching method brings extremely high requirements to the matching circuit of the main and auxiliary power amplifiers.

Method used

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  • Novel combined broadband Doherty power amplifier and design method thereof
  • Novel combined broadband Doherty power amplifier and design method thereof
  • Novel combined broadband Doherty power amplifier and design method thereof

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Embodiment 1

[0044] see figure 1 , shows a new combined broadband Doherty power amplifier according to an embodiment of the present invention, including a Wilkinson power divider 10, a carrier power amplifier circuit, a peak power amplifier circuit, a load modulation network 60 and a post-matching network 70, wherein,

[0045] The Wilkinson power divider 10 divides the input power into equal parts and outputs them to the carrier power amplifier circuit and the peak power amplifier circuit respectively, the output end of the carrier power amplifier circuit and the output end of the peak power amplifier circuit are connected to the load modulation network 60, The load modulation network 60 is connected to the rear matching network 70, the power is output to the rear matching network 70 through the load modulation network 60, and the power is output to the load through the rear matching network 70;

[0046]The carrier power amplifying circuit includes a carrier input matching circuit 31, a ca...

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Abstract

The invention discloses a novel combined broadband Doherty power amplifier and a design method thereof. The power amplifier comprises a Wilkinson power divider, a carrier power amplification circuit,a peak power amplification circuit, a load modulation network and a rear matching network, wherein the Wilkinson power divider equally divides input power and then outputs the 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 is connected with the rear matching network, power is output to the rear matching network through the load modulation network, and the poweris output to a load through the rear matching network. The impedance conversion ratio of the impedance conversion line at the output end of the carrier power amplifier is reduced; and a post-matchingnetwork optimized by a simplified real-frequency method is used at a combining end to replace a quarter-wavelength line to realize broadband matching to a load, so that the working bandwidth of the Doherty power amplifier is expanded.

Description

technical field [0001] The invention belongs to the technical field of power amplifiers, and relates to a novel combining broadband Doherty power amplifier and a design method thereof. Background technique [0002] With the rapid development of communication technology, my country has officially entered the era of 5G commercial use. In the 5G era, a very important technical feature is the ability to connect everything that may be calculated in tens of billions with high bandwidth and low latency. The fifth-generation mobile communication also needs to meet high mobility, seamless roaming and seamless coverage. In principle, it is difficult to realize broadband high-speed data rate and high mobility, and the performance largely depends on the frequency band. This puts higher demands on the power amplifier. [0003] The power amplifier is one of the most important devices in the transmitter of the wireless communication system, and its linearity, efficiency, bandwidth, stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/217
CPCH03F3/217
Inventor 刘国华周国祥程知群郭灿天赐王涛
Owner HANGZHOU DIANZI UNIV FUYANG ELECTRONIC INFORMATION RES INST CO LTD
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