Development of a miniaturized Dynatron THz-Oscillator with a FEBIP system

A FEBIP-(Focused Electron Beam Induced Processing) - System is used to develop a novel miniaturized tunable, portable THz source for 0.1 to 6 THz. The control voltage with the high frequency is generated using a miniaturized Dynatron oscillator. An oscillator is connected to the anode of the Dynatron triode which modulates the anode voltage due to self excited oscillations. The modulated anode voltage is used to control the emission of two miniaturized electron beams, which emit in phase shifted powerful electron pulses in coaxial and opposite direction. As the charges flow in an antenna wire the free flying electron beam pulses emit dipole radiation into a resonator which is adapted in its dimensions to the expected wavelength of the emitted dipole radiation. Like in Klystrons up to 47 % of the power in the free beams is emitted into the THz radiation. Unlike as in transmitter antennas the oscillation charges are flying here in free space. This avoids additional power loss by Joules heating of the resistive wire. We expect a source power of up to 0.1 Watt for such a sources.