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Defense Intelligence Reference Document Pulsed High-Power Microwave Source Technology
Defense Intelligence Agency · 37 pages · text from the file's own layer
This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 28 January 2010, surveys pulsed high-power microwave (HPM) source technology. It was produced under the Advanced Aerospace Weapon System Applications (AAWSA) program. It covers insulation, cathode materials, high-voltage switching, pulse generators, microwave sources such as magnetrons, gyrotrons and the Phoenix and Jolt sources, and antennas. The document concludes that progress depends on advances in cathodes, switching and insulation. It says compact ultrawideband antennas will remain difficult to build.
“BEAMS”14 pages
- p. 4 …17
Pulsed Electron Beam Sources ......................................................................... 17
BWOs, TWTs, and RKAs .................................................................................... 17
Split-Cavity Oscillators ..................................................................................... 18
Virtual…
- p. 15 …CATHODE MATERIALS
This area of research is vitally important to any HPM source requiring electron beam…
- p. 18 …hybrids," which utilize multiple emission mechanisms in
beam generation. The cathodes developed by these programs are…
- p. 22 …The array can then be phased in time to allow steering of the
beam. GaAs switches…
- p. 25 …PULSED ELECTRON BEAM SOURCES
In pulsed electron beam sources, the RF source includes an electron beam…
- p. 26 …r,u, 8FFIIItliL ~81!! SHLY
ray production, and beam breakup. The combination of x-rays and…
- p. 27 …The antenna
produces a 7 x 15 meter elliptical beam spot at a distance of 100…
- p. 28 …The system uses an
innovative flat parabolic surface (FLAPS)
antenna to radiate a focused beam in…
- p. 32 …By timing the switching sequence of each BASS module, the beam
was steerable up to 30…
- p. 33 …The beam width is approximately 2;.JL, and
the gain is L2/), 2 . Also of importance…
- p. 34 …It can be fed with a TM01 mode and produce a directed beam with
a nearly…
- p. 35 …Thus, if the
frequency chirps during the RF pulse,
then the beam direction will sweep. The…
- p. 36 …Parameters such as gain and beam width for UWB antennas are
difficult to define because these…
- p. 37 …Advanced cathode materials, computer codes
for more predictive ability in electron beam generation and propagation, high…
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Figure 10. Jolt Hyperband HPM Source ................................................................. 24
Figure 11. Jolt Radiated Electric Field Waveform at 85 Meters ............................. 24
Figure 12. FLAPS Antenna With a Cross-Shorted Dipole Array ............................. 26
Figure 13. Mode Converter Vlasov Antenna and Vlasov Antenna Attached to a
Coaxial MILO ....................................................................................... 27
Tables
Table 1. Dielectric Properties of Some HPM Plastics ............................................... 3
Table 2. Relative Spark Breakdown Strength of Gases ........................................... 5
Table 3. Cathode Study Findings .......................................................................... 11
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 37 pages are in the text index: search them above, or from the library's search.