Radio frequency power amplifying device and analog predistortion correction method thereof
A technology of pre-distortion correction and radio frequency power, which is applied in the direction of power amplifiers, high frequency amplifiers, negative feedback circuit layout, etc., can solve the problems of poor applicability and limited improvement of the linearity of radio frequency power amplifiers, and achieve good applicability , Reduce the cost of calibration and improve the effect of accuracy
Inactive Publication Date: 2012-08-08
SHENZHEN WINHAP COMM
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[0004] The purpose of the embodiments of the present invention is to provide a radio frequency power amplifier, which aims to solve the problem of applying open-loop control to the radio frequency power amplifier provided by the prior art to generate a distorted signal to offset the distortion of the radio frequency power amplifier, and the linearity of the radio frequency power amplifier The improvement effect is limited and the applicability is not good
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] figure 1 It is a block diagram of the principle structure of the radio frequency power amplification device provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.
[0026] The radio frequency power amplifying device provided by the embodiment of the present invention includes: a radio frequency power amplifier 18; an analog predistortion correction system 11; a first coupler 12 and a first balun 13; A part of the input signal is coupled into the analog predistortion correction syst...
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The invention is suitable for the technical field of the power amplifier design and provides a radio frequency power amplifying device and an analog predistortion correction method thereof. The device comprises an analog predistortion correction system, a first coupler, a third coupler, wherein the analog predistortion correction system divides an input signal of a radio frequency power amplifier, which is coupled by the first coupler, into a first signal and a second signal; the first signal is used for counteracting a main signal of an output signal of the radio frequency power amplifier toobtain a distortion signal; the predistortion processing with the corresponding strength is carried out on the second signal according to the distortion signal; and a second coupler couples and inputs the processed second signal and the rest part of the input signal of the radio frequency power amplifier into the radio frequency power amplifier. Due to adoption of the closed-loop control, the invention improves the improving effect on the linearity of the radio frequency power amplifier and has very good applicability.
Description
technical field [0001] The invention belongs to the technical field of power amplifier design, in particular to a radio frequency power amplifier and an analog predistortion correction method thereof. Background technique [0002] With the official commercialization of the third-generation mobile communication technology (3G) in my country, higher requirements are put forward for the working bandwidth and linearity of communication equipment. [0003] The traditional RF power amplifier meets the linearity requirements of the system through the power back-off method. This method is easy to implement, but the efficiency of the system is greatly reduced. Therefore, the RF power amplifier provided by the prior art uses a nonlinear The device predistorts the RF threshold analog signal directly to generate a distorted signal to offset the distortion of the RF power amplifier. However, since the radio frequency power amplifier provided by the prior art uses open-loop control, the ...
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IPC IPC(8): H03F3/189H03F3/20H03F1/34
Inventor 丁志佳刘义
Owner SHENZHEN WINHAP COMM