Telecommunications – Transmitter – Mobile or portable
Patent
1990-05-09
1992-06-23
Blum, Theodore M.
Telecommunications
Transmitter
Mobile or portable
102209, H04B 1034
Patent
active
051251043
ABSTRACT:
A compact transmitting device located in an exploding projectile transmits an RF pulse upon explosion of the projectile. Receipt of the RF pulse, through triangulation or equivalent techniques, identifies the burst point of the projectile. The transmitting device comprises a magnetic circuit that includes a permanent magnet, a ferromagnetic core having an air gap some distance from the permanent magnet, and a coil in the air gap. Stored energy in the permanent magnet is converted into a high power electrical pulse when the permanent magnet is destroyed. Prior to destruction of the magnet, a constant high magnetic flux exists in the air gap, but induces no current in the coil because it is a constant flux. Upon destruction of the permanent magnet, the magnetic flux changes rapidly, causing a high power electrical pulse to be generated. This high power electrical pulse may be used in a broad band spark transmitter or used to power a narrow band transmitter, causing the location-identifying RF pulse to be generated. In one embodiment, the power of the electrical pulse is increased by charging a capacitor, followed by a very short discharge of the capacitor.
REFERENCES:
patent: 2889776 (1959-06-01), Gunther
patent: 3335239 (1967-08-01), Fey
patent: 4335655 (1982-06-01), Lofgren
Blum Theodore M.
General Atomics
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