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Electric adjusting Doherty power amplifier

A technology for power amplifiers and peak amplifiers, applied in the field of electronically adjustable Doherty power amplifiers, can solve the problems of not being optimal, the power distribution of Doherty power amplifiers is not flexible enough, and the power distribution ratio is no longer adjustable, so as to achieve efficiency loss Reduced effect

Inactive Publication Date: 2012-07-18
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the large gap between the model of active power devices and the actual device, the optimal value obtained by simulation is often not optimal in the actual circuit, and the distribution parameters are not equal. Once the power divider is designed, its power distribution ratio No longer adjustable, resulting in less flexible distribution of Doherty PA power

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. While illustrations of parameters containing particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0021] The electrical regulation structure of the present invention can use the bias voltage to adjust the driving power distribution ratio and combined phase of the Doherty power amplifier. This method has no damage to the circuit itself, and improves the rationality of the power distribution ratio.

[0022] In an exemplary embodiment of the present invention, an electrically tunable Doherty power amplifier is provided. figure ...

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Abstract

The invention discloses an electric adjusting Doherty power amplifier, which is applied to the fields of mobile base station power amplification and satellite communication and the like. In the electric adjusting Doherty power amplifier, driving power splitting ratio of a carrier amplifier and a peak amplifier and a synthetic phase of two branches of amplifiers can be adjusted electrically, therefore a best driving power splitting ratio of the Doherty power amplifier and a best synthetic phase are guaranteed.

Description

technical field [0001] The invention relates to the technical field of power amplifiers in the communication electronics industry, in particular to an electronically adjustable Doherty power amplifier. Background technique [0002] Doherty technology is a hot topic in the field of mobile communication power amplifiers today. The Doherty scheme was first proposed in 1936, and has been widely used and developed rapidly in recent years. [0003] Doherty Power Amplifiers are the only widely available high efficiency solutions for wireless communications amplifiers today. Since Doherty technology is a combined amplification scheme of Class AB power amplifier and Class C power amplifier, it brings certain difficulties to the design of the power amplifier. First, the combined efficiency of output power is difficult to achieve the best. It is difficult to improve the linearity. In order to improve the performance of the Doherty power amplifier, a series of new technical solutions...

Claims

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Application Information

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IPC IPC(8): H03F1/07
Inventor 向永波阎跃鹏彭军陈立平
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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