High power RF amplifiers for UHF and higher frequencies for example still use vacuum tubes, be they specialised planar tubes or slightly more exotic fare such as klystrons.

UK made: RF amplifiers and power amplifiers from 860MHz to 28GHz CML Microcircuits has announced a range of high frequency, high bandwidth RFICS and MMICs aimed at RF and mmWave applications from ...

By expanding its high-power RF amplifier technology offerings, Frontgrade is taking action to enhance its capabilities and address the complex and evolving challenges faced by the aerospace and ...