Corresponding measured results for these findings are shown in Fig. 10. The optimized is approximately 7.5% higher than the original value. The feedthrough of the input signal is also
significant when V. The optimized signal dynamic range of % extends from 22.7 to 31.96 dB (counting up to the output power at 20 V ) and 9.26-dB improvements are obtained. The measurements verify that the methodof decreasing can be beneficial for efficiency enhancement at a low power mode. In practical designs, though, the components and circuits used for gate dc bias adjustment also consumepower and may decrease the system’s overall efficiency. This factor limits the application of this method. The efficiency enhancement method assisted by decreasing the input power, the second method mentioned in Section III, can be used to improve PAE, and thus, reduce the feedthrough of the input drive.