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Posted to sci.electronics.design,sci.electronics.repair,sci.physics,rec.audio.pro
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Could this device be built?
In sci.physics John Larkin wrote:
On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. -- Jim Pennino Remove .spam.sux to reply. |
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