
Accession Number : AD0664217
Title : A MATHEMATICAL MODEL OF A ROTATIONAL FREQUENCY TRANSLATION DEVICE,
Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C
Personal Author(s) : Sachs,D.
Report Date : 12 DEC 1967
Pagination or Media Count : 28
Abstract : An analysis was made which provides a theoretical explanation of a unique radiation torque experiment performed by Allen, in which circularly polarized (cp) microwave power was used to impart continuous rotary motion to an object supported within a circular waveguide. Under the action of the cp wave, an oscillating current was set up in a rod dipole resulting in an oscillating dipole moment. Part of the energy scattered by the rotating dipole is frequency shifted. Torques arise from the interactions between the Efield of the wave and the induced dipole moment, and between the oscillating current in the dipole and the longitudinal Hfield in the waveguide. The magnitudes of these torques were derived for two cases of interest; the open waveguide and the shorted waveguide. The magnitudes of the spectral components of the radiation scattered by the dipole were also derived along with their characteristic polarizations. A cursory analysis shows that photons are conserved in such an experiment. (Author)
Descriptors : (*ELECTROMAGNETIC RADIATION, INTERACTIONS), (*DIPOLE MOMENTS, MOMENTUM), MICROWAVES, POLARIZATION, TORQUE, MATHEMATICAL ANALYSIS, INTERACTIONS, PHOTONS, MATHEMATICAL MODELS, ROTATION
Subject Categories : Electricity and Magnetism
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE