Results are presented on the development and experimental study of a reflex
triode with a new type of virtual cathode. In this device, a discharge exc
ited along a ferroelectric surface is used as a source of electrons and loo
p antennas are used for emitting radiation. Generation of broadband radio p
ulses with a central frequency of similar to 300 MHz and power of similar t
o 80 W is achieved. (C) 2000 MAIK "Nauka/Interperiodica".