These original Kirt's Cogitations™
may be reproduced (no more than 5, please) provided proper credit is given to me, Kirt
– noun: Concerted thought or reflection; meditation; contemplation.
Kirt [kert] – proper noun: RF Cafe webmaster.
The Doppler Toppler
- that's what it's discoverers are calling it. Physicists in England
have demonstrated a form of motion-induced frequency shift that is opposite
of Doppler. This inverse Doppler was first predicted in the 1940s, and
produces a frequency shift 100k times greater than Doppler. A contraption
comprised of a bank of capacitors and inductors is pulsed with up to
100 A of current, which sets up the necessary conditions for Doppler
inversion. What basically is a case of really bad VSWR creates a series
of multiplying wavefront compressions yield frequency factors of 20
or greater during each boundary reflection. Multiple passes rapidly
generate very high shifts. The terahertz frequencies produced by this
method are planned for use in medical imaging, security scanning and
many other applications.