RESEARCH AND INVESTIGATION LEADING TO METHODS OF GENERATING AND DETECTING RADIATION IN THE 100 TO 1000 MICRON WAVE-LENGTH RANGE OF THE SPECTRUM. Final Report
- Author
- Hakki, B.
- Published
- United States : [publisher not identified], 1961.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1961. - Physical Description
- microopaque : positive ; 8 x 13 cm
- Summary
- A high energy, tightly bunched, beam was used to generate coherent electromagnetic radiation in the low millimeter range. The devices used to couple power out of this beam were: a high order mode right circular cylindrical cavity, a dielectric tabe resonator, a dielectric tube waveguide, a helix waveguide, and a slab of dielectric. Interaction of the beam with these devices was experimentally verified and agreement with theory is reasonable. Cherenkov radiation in the slab of dielectric was shown to yield less power than the rest of the coupling schemes; however it has no mode interference problems. The coupling schemes which were fully analyzed but not experimentally tested include: Cherenkov radiation in a gyrotropic plasma waveguide, Cherenkov radiation in a gyrotropic plasma medium, and Doppler frequency shift from high energy electron bunches. A gas discharge frequency multiplier was used to generate the l3th harmonic of the fundamental at microwave frequencies. Analysis of this device was completed and agreement between theory and experiment was excellent. The gas discharge was also used as a frequency mixer at high power levels. Frequency multiplication in ferroelectric materials was shown to be impractical, at the present, because of the lack of a material which is sufficiently lossless and nonlinear. A Doppler-Helitron microwave oscillator was proposed. The mode of operation was theoretically analyzed but no experimental verification was done. A complete line of microwave components was de veloped for the 140 to 220 kmc band. This included: crystal multipliers, waveguide flanges, crystal detectors, bolometers; tunable shorts, VSWR measuring devices, frequency meters, tapered transitions, horns, variable phase shifters, power dividers, bends and twists, terminations, attenuators, and mode converters. (auth)
- Report Numbers
- TID-12844
- Other Subject(s)
- Collection
- U.S. Atomic Energy Commission depository collection.
- Note
- DOE contract number: AT(11-1)-392
NSA number: NSA-15-027783
OSTI Identifier 4843631
Research organization: Illinois. Univ., Urbana. Electrical Engineering Research Lab.
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