Multi-path asymmetrical Doherty power amplifier

A technology of power amplifier and power amplifier circuit, applied in the field of multi-channel asymmetric Doherty power amplifier, can solve the problems of complex structure, low stability and poor compatibility of power amplifier circuit, and achieves simple structure, good compatibility and improved stability. Effect

Active Publication Date: 2012-02-15
SHENZHEN UNIV
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Problems solved by technology

[0007] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a multi-channel asymmetrical Doherty power amplifier to solve the problems of complex structure, low stability and poor compatibility of the existing power amplifier circuit

Method used

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  • Multi-path asymmetrical Doherty power amplifier

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Embodiment Construction

[0034] The present invention provides a multi-channel asymmetrical Doherty power amplifier. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] Doherty power amplifier has simple structure, low cost, high efficiency, stable circuit, and can be conveniently used in combination with various linearization techniques. However, the requirements for the internal circuit of multi-channel asymmetric Doherty power amplifier are relatively strict, including several factor:

[0036] 1. Compared with the traditional Doherty power amplifier, the new Doherty power amplifier has great advantages in terms of efficiency and power. However, due to the particulari...

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Abstract

The invention discloses a multi-path asymmetrical Doherty power amplifier, which comprises a first coupler, a second coupler, a carrier amplifier, a first 1/4 wavelength impedance conversion microstrip transmission line, a second 1/4 wavelength impedance conversion microstrip transmission line, a first peak amplifier and a second peak amplifier, wherein the first output end of the first coupler is connected with the first 1/4 wavelength impedance conversion microstrip transmission line sequentially by the second peak amplifier and the second 1/4 wavelength impedance conversion microstrip transmission line; the second output end of the first coupler is connected with a carrier amplifier and the input end of the first peak amplifier by the second coupler respectively; the output end of the carrier amplifier is connected with the first 1/4 wavelength impedance conversion microstrip transmission line; and the output end of the first peak amplifier is connected with the first 1/4 wavelength impedance conversion microstrip transmission line by the second 1/4 wavelength impedance conversion microstrip transmission line. The multi-path asymmetrical Doherty power amplifier has the advantages of high integration level, low cost, high efficiency, circuit stability and the like.

Description

technical field [0001] The invention relates to the technical field of power amplifiers in communication systems, in particular to a multi-channel asymmetrical Doherty power amplifier. Background technique [0002] RF power amplifiers are widely used in various wireless communication transmission equipment. The cost ratio of the linear power amplifier in the base station accounts for about 1 / 3, how to solve the linearization problem of the power amplifier effectively and at low cost is very important. Due to the requirements of resource conservation and environmental protection in modern society, Doherty technology, as an efficient power amplifier efficiency improvement technology, has a promising application prospect in the industry. Most communication enterprises and scientific research institutes at home and abroad have invested a lot of money and manpower in the research of Doherty technology. [0003] Traditional Doherty power amplifier structures include symmetrical ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/07
CPCH03F1/0288
Inventor 何业军李健锋章颖
Owner SHENZHEN UNIV
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