Harmonic Frequency-Locking In The Multi-Frequency Recirculating Planar Magnetron
ORAL
Abstract
Sources that generate high power electromagnetic radiation at multiple microwave frequencies are relevant for technologies such as counter electronics. At The University of Michigan, the Multi-Frequency Recirculating Planar Magnetron (MFRPM) [1,2] has been experimentally demonstrated to produce simultaneous oscillations at 1 GHz and 2 GHz, generating up to 32 MW and 13 MW, respectively. The MFRPM is driven by MELBA-C at -300 kV, 1-5 kA for 0.3-1.0 $\mu $s with a 0.11-0.3T magnetic field. A novel harmonic frequency-locked state was observed between the 1 GHz and 2 GHz oscillators. Simulations are being conducted to design new experiments to investigate the physics of this locking behavior. [1] G.B. Greening, Ph.D Dissertation, ``Multi-Frequency Recirculating Planar Magnetrons,'' University of Michigan, 2017, [2] G.B. Greening, N. M. Jordan, S. C. Exelby, Y. Y. Lau, and R. M. Gilgenbach, ``Multi-frequency recirculating planar magnetrons,'' Applied Physics Letters, 109, 074101 (2016).
*Supported by the Office of Naval Research under grant numbers N00014-13-1-0566 and N00014-16-1-2353, a DEPS Fellowship to GG, ATK for MAGIC, and L-3 Communications Electron Devices Division.
–