A field emission RF amplifier. The field emission RF amplifier includes
one or more RF amplification units on a substrate and held in a vacuum
state and facing a reflection electrode. The RF amplification unit
includes a cathode electrode, gate electrode, and an anode electrode all
formed on the same substrate. The cathode electrode has a CNT emitter. A
DC voltages are applied to the cathode and anode electrodes. An RF signal
is input at the cathode electrode and is amplified and output at the
anode electrode. Capacitors and inductors are arranged to filter out AC
and DC components where needed. An improved amplification of RF signals
with high electron mobility and good impedance matching abilities result.