For example: Agilent E4440A or Anritsu 68369
Amplifiers
RF Amplifiers
Varian(CPI) VZX-6981K4
TWT Amplifier, 8 GHz TO 12.4 GHz, 20 Watt, 40 dB Gain
Manufacturer: Varian(CPI)
Keysight / Agilent Z5623AK03
Distribution Amplifier, 250 MHz - 4 GHz
Manufacturer: Keysight / Agilent