A circuit technique to correct Vdd/PM distortion and improve efficiency as supply modulation of cascode class-E PAs has been proposed. The experimental result shows that the phase distortion can be improved from 20 degrees to 5 degrees. Moreover, a system co-simulation result demonstrated that the EVM can be improved from-17 dB to-19 dB.
- Class-E power amplifier
- Envelope elimination and restoration (EER)
- Orthogonal frequency division multiplexing (OFDM)
- Polar system