Nonlinearity extractor of ultra-wideband radio-frequency power amplifier
A technology of radio frequency power and ultra-wideband, which is applied in the field of nonlinear characteristic extraction devices, can solve the problems that the nonlinear characteristics of ultra-wideband radio frequency power amplifiers cannot be extracted, the development of broadband wireless communication technology is limited, and the conversion accuracy is difficult to achieve. Achieve high-precision extraction, offset undistorted signals, and accurate error extraction
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Embodiment 1
[0025] Embodiment one: if figure 2As shown, a device for extracting nonlinear characteristics of an ultra-wideband RF power amplifier includes a first coupler 1, a second coupler 2, a first mixer 3, a second mixer 4, a first attenuator 5, The first analog-to-digital converter 6, the second analog-to-digital converter 7 and the error separation module 9, the input end of the first coupler 1 is used to access the radio frequency input signal RF1, and the output end of the first coupler 1 is used to connect the radio frequency The signal input end of power amplifier 10 (being the ultra-wideband radio frequency power amplifier), the coupling end of the first coupler 1 is connected with the input end of the first mixer 3, and the output end of the first mixer 3 is connected with the first modulus The input end of the converter 6 is connected, the input end of the second coupler 2 is used to connect the signal output end of the radio frequency power amplifier 10, the coupling end o...
Embodiment 2
[0029] Embodiment two: if image 3 As shown, this embodiment is basically the same as Embodiment 1, the only difference is that the input end of the phase shifter 91 is connected to the coupling end of the first coupler 1 through the second attenuator 93, when the second attenuator 93 is added , the amplitude balance between the signals coupled from the signal input end and the signal output end of the radio frequency power amplifier 10 can be adjusted more precisely, so that the error extraction is more accurate.
[0030] In the above specific embodiments, both the first attenuator 5 and the second attenuator 93 may be variable attenuators, and the phase shifter 91 may be an adjustable phase shifter.
[0031] The second technical solution of the present invention is an intermediate frequency cancellation scheme: as Figure 4 As shown, a device for extracting nonlinear characteristics of an ultra-wideband RF power amplifier includes a first coupler 1, a second coupler 2, a fi...
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