Conventional radar pulses spread so that the energy reaching a reflecting target at range r decreases as r-2. The energy echoed from the target also decreases as r-2, so that the energy backscattered to the transmitter is proportional to the product, i.e., to r-4. Pulses of finite total energy that satisfy Maxwell's equations need not decrease as r-2, but can instead decrease much more slowly, for instance as r-epsilon where epsilon is a positive number that can be chosen as small as one pleases. Such pulses are referred to as electromagnetic missiles. We report here on the echo backscattered when an electromagnetic missile encounters a plate target. By analogy with conventional radar, one might expect the energy of the echo to be proportional to r-2 epsilon. Instead, the reflected energy decreases even slower, proportional to r-epsilon, so that no squaring occurs, resulting in a larger than expected radar return.
Backscattering of electromagnetic missiles
Rückwärtsstreuung von elektromagnetischen Flugkörpern
Proceedings of SPIE, Intense Microwave and Particle Beams ; 1226 ; 290-301
1990
12 Seiten, 5 Bilder, 3 Quellen
Conference paper
English
Online Contents | 1994
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MISSILES - Mésentente cordiale dans les missiles.
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