Wave transmission lines and networks – Wave-shaping
Patent
1983-05-09
1986-03-11
Zazworsky, John
Wave transmission lines and networks
Wave-shaping
307268, 328 67, 328 74, 333 23, H04B 304, H03K 507
Patent
active
045756937
ABSTRACT:
A pulse modulator including a pulse forming network comprising a multiple section ladder network of series inductors and shunt capacitors. The series inductors are flat, spiral inductors etched on microstrip. The pulse forming network is charged negatively through an IMPATT diode, and is switched to ground by a set of p-channel VMOS power FETs. By switching off the FET switches before the pulse forming network is completely dicharged, the fall time of the current pulse is reduced. The shape of the current pulse can be adjusted by varying the impedance of the section or sections of the pulse forming network whose position in the network corresponds to the position in the current pulse which it is desired to change. The variation in impedance is realized by bringing metallic slugs, mounted in the housing of the pulse forming network, into proximity with the flat, spiral inductors.
REFERENCES:
patent: 2947884 (1960-08-01), Horodyski
patent: 3737679 (1973-06-01), Cooper
patent: 3832568 (1974-08-01), Wang
patent: 3881120 (1975-04-01), Osterwalder
patent: 4099128 (1978-07-01), Hooper
patent: 4115708 (1978-09-01), Liv
patent: 4328470 (1982-05-01), Bumgardner
de La Chapelle Michael
Wilhelmi Frank A.
Brown Charles D.
Hughes Aircraft Company
Karambelas A. W.
Zazworsky John
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