Angle measurement compensation technique for amplitude compariso

Details Angle measurement compensation technique for amplitude compariso Angle measurement compensation technique for amplitude compariso

1990-11-05

1991-09-24

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Determining direction

Monopulse

342174, G01S 740, G01S 1344

Patent

active

050517520

ABSTRACT:
A compensated amplitude comparison monopulse receiver (10) having an angular measurement capability substantially unaffected by mismatches in channel transient response and target range tracking inaccuracy is disclosed herein. The inventive monopulse receiver (10) includes a first receiver channel (24) for impressing a first output voltage S1 on a first output port (28) thereof in response to excitation by a sum signal. A second receiver channel (26) impresses a second output voltage S2 on a second output port (30) thereof in response to excitation by the sum and a difference signal. In a calibration mode, a calibration source (22) provides a series of calibration pulses to the first and second channels (24, 26) which induces first and second calibration voltages to appear on the first and second output ports (28, 30) thereof. Sampling gates (32, 34) sample the first and second calibration voltages subsequent to application of each calibration pulse to the first and second receiver channels (24, 26). In a tracking mode the sample gates (32, 34) are operative to sample the first and second output voltages present on the first and second output ports (28, 30). The inventive receiver 10 further includes circuitry (48, 50) for calculating the angular location of the first object from the sampled first and second output voltages. A compensation network (36) then adjusts the calculated angular location on the basis of the sampled calibration voltages.

REFERENCES:
patent: 3810177 (1974-05-01), Tabourier
patent: 4642642 (1987-02-01), Uurtamo
patent: 4994810 (1991-02-01), Sinsky

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