Pulse or digital communications – Repeaters – Testing
Patent
1984-12-03
1987-02-03
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 23, 375115, H04B 1500, H04K 100, H04L 2730
Patent
active
046413170
ABSTRACT:
A communications system wherein an intelligence signal modulates the spacing of relatively narrow pulses of a fixed rate pulse train, and these pulses key on a transmitter which employs a pair of series connected avalanche mode operated transistors. These are repetitively powered via a charged coaxial delay line, and the output, appearing across a resistive load, is fed directly, or through a shaping filter, to a discone transmitting antenna. At a receiving location, the received signal is amplified by a wide band amplifier and fed through a reverse contoured filter (of the transmitting filter, if one is employed). The signal is detected via synchronous detection which locks onto the received pulse train, after which the modulation evidence by the pulse train is recovered by a low pass filter.
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patent: 3806795 (1974-04-01), Morey
patent: 4070550 (1978-01-01), Miller, Jr. et al.
patent: 4324002 (1982-04-01), Spilker, Jr.
patent: 4380746 (1983-04-01), Sun et al.
Bennett et al., "Time-Domain Electromagnetics and its Applications," Proceedings of the IEEE, vol. 66, No. 3, Mar. 1978.
Cook, J. C., "Monocycle Radar Pulses as Environmental Probes," Institute of Science and Technology, The University of Michigan.
Chin Stephen
Griffin Robert L.
Phillips C. A.
Phillips Charles A.
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