HPUE Envelope Tracking Power Amplifier Supporting 100 MHz 5G-NR Signal in Band n77

This paper presents a prototype power amplifier (PA) module for fifth generation (5G) mobile handset applications operating in band n77. The PA module is optimized to maintain high linearity performance even under envelope tracking (ET) mode operation. The measurement has been carried out under the ET mode operation with the modulation condition of 5G-NR (New Radio) 100 MHz signals. The result demonstrates that the prototype ET PA obtains sufficient linearity performance to meet the specifications for high-power user equipment (HPUE) without using any digital predistortion (DPD) technique, while delivering the DC power consumption lower than 2630 mW at the output power of 27.5 dBm.