Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By simulation
Patent
1986-01-10
1987-07-28
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By simulation
342 15, G01S 740
Patent
active
046834737
ABSTRACT:
A device for imparting a selected delay to a pulse emanating from a transmitter before the pulse is returned as a simulated radar echo to a radar altimeter receiver. The selected delay is obtained by recirculating the transmitted pulse through a fixed delay element a prescribed number of times. The system includes a control circuit, including a single-pole, double-throw electronic switch coupled to a presettable counter which may be preloaded with a count value corresponding to the number of iterations of the transmitted pulse through a closed loop including the delay elements. Upon each such traversal, the counter is decremented and when the counter generates a borrow signal, the electronic switch diverts the pulse to the altimeter's receiver. The recirculation loop also includes pulse amplifying and shaping circuitry for compensating for attenuation and distortion of the recirculating pulse.
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Gregory Bernarr Earl
Honeywell Inc.
Leone, Sr. George A.
Tubbesing T. H.
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