On-chip integrated broadband linearizer based on variable capacitor
A technology of variable capacitance and linearizer, applied in improving amplifiers to reduce nonlinear distortion, power amplifiers, improving amplifiers to expand bandwidth, etc., can solve problems such as narrow application bandwidth and poor adjustability of analog predistorters, and achieve Broaden the bandwidth, improve the standing wave of the port, and facilitate the adjustment
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[0042] In order to verify the effect of the present invention, based on Wenmao PE15 technology, utilize software ADS simulation software to design two power amplifiers of Ka frequency band (24GHz-28GHz), one of them is the AB class power amplifier without integrated linearizer, and the other is in the A class AB power amplifier of the present invention is added on the basis of a power amplifier. Carry out two-tone signal (interval 100MHz) simulation on two power amplifiers, the working frequency is 24-28GHz, the result is as follows Figure 4(a)-Figure 4(e) The resulting figure is shown. From the figure, we can find that the third-order intermodulation (IMD3) of the traditional class AB power amplifier is compared with the third-order intermodulation (IMD3) of the class AB power amplifier with integrated linearizer. The third-order intermodulation (IMD3) of the linearizer is greatly improved, and the maximum improvement can reach 25dB. The operating bandwidth of the prior ar...
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