Phase array calibration orthogonal phase sequence

Details Phase array calibration orthogonal phase sequence Phase array calibration orthogonal phase sequence

1997-12-23

1999-01-19

Tarcza, Thomas

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

Directive

Including a steerable array

342174, 342373, 342374, H01Q 324

Patent

active

058618430

ABSTRACT:
Methods and systems for calibrating an array antenna are described. The array antenna has a plurality of antenna elements each having a signal with a phase and an amplitude forming an array antenna signal. For calibration, the phase of each element signal is sequentially switched one at a time through four orthogonal phase states. At each orthogonal phase state, the power of the array antenna signal is measured. A phase and an amplitude error for each of the element signals is determined based on the power of the array antenna signal at each of the four orthogonal phase states. The phase and amplitude of each of the element signals is then adjusted by the corresponding phase and amplitude errors.

REFERENCES:
patent: 5063529 (1991-11-01), Chapoton
patent: 5248982 (1993-09-01), Reinhardt
patent: 5455592 (1995-10-01), Huddle
patent: 5530445 (1996-06-01), Wachs et al.
patent: 5677696 (1997-10-01), Silverstein et al.

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