Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1997-08-05
1999-03-30
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342 30, 342462, G01S 302, G01S 502
Patent
active
058894918
ABSTRACT:
A calibration system for a pilot warning system includes first and second calibration antennas spaced apart on an aircraft. The first and second calibration antennas receive the same pulsed RF signal, suitable delayed so that, after emission from the calibration antennas, the pulsed signal is received at times at antennas of the pilot warning system appropriate to indicate that a simulated target is within or outside (up or down) an elevation angular band of interest. Adjustment of relative timing is made by inducing relative transmission delays of the pulsed signal on its way to the two antennas. In one embodiment, different cable lengths produce the desired delays.
REFERENCES:
patent: 4916451 (1990-04-01), Ishita
patent: 5223847 (1993-06-01), Minter
patent: 5506590 (1996-04-01), Minter
patent: 5541608 (1996-07-01), Murphy et al.
patent: 5629692 (1997-05-01), Stayton et al.
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