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Doherty power amplification circuit

A technology of power amplifier circuit and circuit, which is applied in power amplifiers, improved amplifiers to expand bandwidth, improved amplifiers to improve efficiency, etc., and can solve problems such as limited bandwidth

Active Publication Date: 2014-10-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a Doherty power amplifier circuit to solve the problem of limited bandwidth due to the presence of λ / 4 impedance transformation lines in traditional Doherty circuit structures

Method used

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Embodiment Construction

[0017] An embodiment of the present invention provides a Doherty power amplifying circuit, the main power amplifier branch includes a main power amplifier, an input matching circuit and an output matching circuit of the main power amplifier, and a circuit between the output matching circuit of the main power amplifier and the power combiner A first compensation circuit; wherein, the output matching circuit of the main power amplifier uses the minimum phase allowed by the main power amplifier branch. Since the output matching circuit of the main power amplifier branch uses the minimum phase allowed by the main power amplifier branch, the λ / 4 impedance transformation line does not need to be used on the main branch, thereby improving the system bandwidth.

[0018] In order to make the purpose, technical solutions and beneficial effects of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompan...

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Abstract

The embodiment of the invention relates to the technical field of mobile communication, in particular to a Doherty power amplification circuit. The Doherty power amplification circuit is used for solving the problem that the bandwidth of a traditional power amplification circuit structure is limited because a quarter-wave impedance transformation line exists. According to the method, a main power amplifier branch comprises a main power amplifier, an input matching circuit of the main power amplifier, an output matching circuit of the main power amplifier and a first compensating circuit located between the output matching circuit of the main power amplifier and a power combiner, wherein the minimum phase allowed by the main power amplifier branch is used for the output matching circuit of the main power amplifier. As the minimum phase allowed by the main power amplifier branch is used for the output matching circuit of the main power amplifier, the main branch does not need to use the lamda / 4 impedance transformation line, and then the system bandwidth is increased.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a Doherty power amplifying circuit. Background technique [0002] With the continuous development of communication technology, 2G, 3G and 4G communication standards coexist. Both equipment suppliers and network operators expect to realize communication equipment that can support multi-band and multi-standard work at the same time, so as to reduce equipment production and Network operation and maintenance costs. In addition, from the perspective of energy saving and emission reduction and green communication, while supporting multi-band and multi-standard work, communication equipment is also required to be highly efficient. As the most severely bandwidth-limited high-energy-consuming component in communication equipment, power amplifiers inevitably face the design challenges of broadband and high efficiency. [0003] Most of the existing amplifiers are realized by ...

Claims

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Application Information

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IPC IPC(8): H03F1/07H03F1/42H03F3/20
Inventor 艾宝强杨世民李昕
Owner DATANG MOBILE COMM EQUIP CO LTD
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