Design and Test of Q/V Band TWT Linearizer

Based on analog predistortion technology, a broadband linearizer covering Q/V band is designed to linearize folded waveguide TWT amplifiers. The goal is to achieve amplitude expansion and phase expansion at 47GHz to 51GHz. It has the characteristics of miniaturization and integration, and has a certain gain control and nonlinear adjustment range in the band to meet the requirements of testing. According to the design results, the linearizer is developed and tested. Within the working bandwidth, the amplitude expansion is greater than 4 dB, the phase expansion is greater than 60 °, and the output gain equalization is greater than 7 dB. The development of Q/V broadband TWT linearizer provides strong technical support for LEO satellites.