Fujitsu Labs announced earlier today the development of a GaN  HEMT power amplifier for use in W-band (75-110 GHz) transmissions. To realize long-distance, high-capacity wireless communications, a promising approach is to utilize the W-band and other high frequency bands that encompass a broad range of usable frequencies, and increase output with a transmission power amplifier. ...

This story continues at Fujitsu GaN-HEMT PA achieves world’s highest output density

Or just read more coverage at Electronics Weekly