Ferdinand-Braun-Institut Develops 4 GHz Digital Class-E Outphasing PA for Highly Efficient 5G Base Stations

Ferdinand-Braun-Institut (FBH) has developed the first GaN-based digital class-E outphasing power amplifier module for 5G base station applications in the 4 - 6 GHz range. This amplifier consists of two digital GaN PA MMICs with a 4:1 size ratio between the final-stage transistor gate-widths. The amplifier chips follow a compact digital layout approach without any reactive matching to provide broadband operation and flexibility in terms of signal frequency.
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