Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna pattern plotting
Patent
1999-07-12
2000-07-04
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna pattern plotting
342174, 342374, H01Q 300
Patent
active
060845457
ABSTRACT:
A near-field calibration arrangement for a phased-array antenna determines the phase shifts or attenuation of the elemental control elements of the array. The calibration system includes a probe located in the near field, and a calibration tone generator. The tone generator is coupled to the probe in the case of calibration of a receive antenna, and to the signal port of the array in the case of calibration of a transmit antenna. A code generator generates sets of values, with each set being orthogonal to the others. The codes are applied to the control input port of the array antenna, so that the codes encode the tone passing through the antenna. The encoded tones are applied to a decoder and processor, which processes the signals to determine the phase shift or attenuation associated with each bit of the control signal.
REFERENCES:
patent: 5160933 (1992-11-01), Hager
patent: 5248982 (1993-09-01), Reinhardt et al.
patent: 5530449 (1996-06-01), Wachs et al.
patent: 5790071 (1998-08-01), Silverstein et al.
Ashe Jeffrey Michael
Jacomb-Hood Anthony Wykeham
Lier Erik
Purdy Daniel Sanford
Volman Vladimir
Lockheed Martin Corporation
Meise W. H.
Phan Dao L.
Tarcza Thomas H.
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