Active array self calibration

Details Active array self calibration Active array self calibration

1996-05-02

1997-10-28

Sotomayor, John B.

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

Testing or calibrating of radar system

By monitoring

342372, 342196, G01S 740

Patent

active

056821654

ABSTRACT:
A process for collecting phase and amplitude calibration data for an active array system without the use of external sensors. The relative phase and amplitudes of adjacent T/R modules are determined when viewed through the entire array system. The calibration process involves collecting and storing these phases and amplitudes for future use. A pulse-to-pulse phase or amplitude modulation mode is employed. An element is commanded into this mode to separate its signal (in frequency) from competing signals and leakages from the surrounding modules. A T/R inversion command allows for a single element to be switched to a transmit state while the remainder of the array is in the receive state. This provides for a reference signal during receive calibration, and for single module testing during transmit calibration.

REFERENCES:
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patent: 5093649 (1992-03-01), Johnson
patent: 5223846 (1993-06-01), Campbell
patent: 5367305 (1994-11-01), Volker et al.
patent: 5374935 (1994-12-01), Forrest
patent: 5559519 (1996-09-01), Fenner
patent: 5572219 (1996-11-01), Silverstein et al.

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