Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1990-03-21
1991-10-01
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
G01S 740
Patent
active
050537776
ABSTRACT:
The measurement of the stability of a radar in transmission/reception includes two steps. During a first step, video voltage signals leaving a phase detector of the radar receiver are measured at significant instants where said signals are capable of undergoing fluctuations. These signals come from a signal reflected by a fixed target and received by the radar. During a second step, an additional signal with pre-determined phase and amplitude is superimposed on the received signal in the receiver, in order to substantially cancel the stable parts of the voltage signals and to measure the fluctuations of the voltage signals thus obtained at said significant instants. The instrument to measure these fluctuations advantageously includes analog/digital converters with a small number of bits.
REFERENCES:
patent: 3950750 (1976-04-01), Churchill et al.
patent: 4003054 (1977-01-01), Goldstone
patent: 4626856 (1986-12-01), Pierson et al.
The Following is a list of pending applications and registrations by applicant: U.S. Pat. No. 3,984,788, granted 10/15/76; and U.S. appln. Ser. No. 06/503,601, filed 6/13/83.
"Thomson-CSF"
Hellner Mark
Plottel Roland
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