Boots – shoes – and leggings
Patent
1989-12-29
1991-11-05
Cangialosi, Salvatore
Boots, shoes, and leggings
342174, G01S 740
Patent
active
050635298
ABSTRACT:
A calibration method for a phased array antenna uses automated signal processing techniques to compute calibration coefficients, and can be performed while the antenna is on-line. The calibration method is based on a generalized model in which the array is characterized by a phase-state control function. The calibration coefficients for a phase shift element are computed using phase response measurements derived from an estimation of the residual aperture response attributable to the other elements. For each element of the array, a first set of I Q aperture response measurements is used to estimate (FIG. 1a, 10) the R.sub.I and R.sub.Q residual components of the total I Q aperture response attributable to the other elements. Using these residual components, a second set Y of I Q aperture response measurements is converted (FIG. 1b, 20) to measurements of the phase response attributable to the selected element. From these phase response measurements, the calibration coefficients .phi..sub.i can be computed (FIG. 1c, 30) using the phase-state control function.
REFERENCES:
patent: 4488155 (1984-12-01), Wu
patent: 4520361 (1985-05-01), Frgzitg
patent: 4864315 (1989-09-01), Mohuohy
patent: 4926186 (1990-05-01), Kelley et al.
Cangialosi Salvatore
Grossman Rene E.
Sharp Melvin
Texas Instruments Incorporated
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