Fig. 1. Theoretical model of predistortion linearizer

Fig. 2. Relationship between third-order intermodulation degradation and gain error

Fig. 3. Curves of AM/AM characteristic of TWTA

Fig. 4. Curves of AM/AM characteristic of LTWTA when PD and TWTA is not well matched

Fig. 5. Amplitude-frequency characteristic of TWTA

Fig. 6. The amplitude-frequency and phase-frequency characteristics of PD

Fig. 7. Gain and phase characteristics of TWTA and LTWTA at there frequencies

Fig. 8. C/IM3 improvement of TWTA with predistortion linearization