Linear efficient multi-body power amplifier based on harmonic impedance matching
A power amplifier and harmonic impedance technology, which is applied in the field of linear high-efficiency symmetrical multi-integrated (Doherty) power amplifiers, can solve the problems that the performance of the Doherty power amplifier cannot be optimized, affect the Doherty power amplifier, and the saturated output current is low. Reduce the range, good linearity, and improve the effect of saturated output current
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[0053] This patent provides a linear high-efficiency Doherty power amplifier circuit structure based on harmonic matching. In order to illustrate the circuit structure of the present invention more clearly, a detailed description will be given below in conjunction with the schematic diagram of the circuit.
[0054] Figure 5 It is the circuit schematic diagram used by the carrier power amplifier and the peak power amplifier in the Doherty power amplifier. Here, it is explained that the carrier power amplifier and the peak power amplifier adopt the same circuit structure, so a circuit schematic diagram is used to explain the principle and the best implementation of the carrier power amplifier and the peak power amplifier. For the carrier power amplifier, it works in class AB. By matching the fundamental wave impedance, the second harmonic impedance and the third harmonic impedance of the input / output end, the efficiency can be improved, and it has a certain linearity; for the p...
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