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CN110504926A 一种多带Doherty功率放大器 有权 转让

一种多带Doherty功率放大器
摘要：
一种Doherty功率放大器，包括功分器、第一输入匹配网络、第二输入匹配网络、相位补偿器、第一功率放大器CG1、第二功率放大器CG2、第一阻抗逆变器、第二阻抗逆变器和后匹配网络。设置第一阻抗逆变器的特征阻抗ZT1为Ropt，相移为θ，设置第二阻抗逆变器特征阻抗ZT2为Ropt，相移为2θ。通过将第二阻抗逆变器的相移设置为第一阻抗逆变器相移的两倍，能够通过交换第一功率放大器和第二功率放大器栅极偏置电压使得本发明工作在两种工作模式下。该两种模式可以工作于多频段，且在这些频段上实现高效率、高增益。
摘要（英）：

The Doherty power amplifier comprises a power divider, a first input matching network, a second input matching network, a phase compensator, a first power amplifier CG1, a second power amplifier CG2,a first impedance inverter, a second impedance inverter and a rear matching network. The characteristic impedance ZT1 of the first impedance inverter is set to be Ropt, the phase shift is set to be theta, and the characteristic impedance ZT2 of the second impedance inverter is set to be Ropt, and the phase shift is set to be 2theta. The phase shift of the second impedance inverter is set to be twice the phase shift of the first impedance inverter, so that the amplifier can work in two working modes by exchanging the grid bias voltage of the first power amplifier and the grid bias voltage of the second power amplifier. The two modes can work in multiple frequency bands, and high efficiency and high gain are realized on the frequency bands.

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