Study of Miniature Ku-Band Multiple-Beam Klystron with Built-in Shadow Grid of High-Density Pyrolytic Graphite

The results of experimental studies of multiple-beam Ku-band klystron with a pyrolytic graphite shadow grid and klystron of the same type with a hafnium shadow grid are presented. The high antiemissive properties of pyrolytic graphite give a decrease in the thermionic current from 15–30 mA to zero compared to the hafnium grid. This allowed for stable operation of the klystron at lower values of the off-duty ratio compared to the klystron with a hafnium shadow grid.