RESEARCH AND DEVELOPMENT PROGRAM ON NMR-EPR COMMUNICATION RECEIVER.
Abstract
An investigation was made to determine the feasibility of developing audio frequency comb filters by utilizing spin resonance (NMR and EPR) techniques. Optically pumped vapor of 199Hg and 201Hg was selected as an investigative medium because of the narrow bandedness (1 Hz) and large signal-to-noise power ratio (60 db) of the associated NMR. An approach to the comb filter problem of utilizing the generation of multiple frequency components to the spin density matrix (sidebands) was found to be feasible (Spin Filter: Type I). Another approach to the comb filter problem (Spin Filter: Type II) similar to the one described above but involving signal input along the static magnetic field direction was also found to be feasible. More effort will be needed to develop this approach becuase of signal-to-noise difficulties. Both approaches are remarkable in their apparent, but as yet unexplored, wide range of adaptability to signal form and frequency. The principles developed are general and are applicable from the audio to the microwave and possibly higher frequencies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1967
- Accession Number
- AD0820458
Entities
People
- Glenn E. Conklin
- Joseph R. Desanto