Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1989-05-18
1990-12-25
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
H01Q 322, H01Q 324, H01Q 326
Patent
active
049806912
ABSTRACT:
A distributed parallel processing architecture for electronically steerable multi-element RF array antennas provides real time rapid array updates with decreased hardware cost and complexity. The array is subdivided into plural sub-arrays (each sub-array has more than one RF radiating element) and a phase shift interface electronics ("PIE") device is provided for each sub-array. Parameters specific to the RF elements within the sub-arrays are preloaded into the corresponding PIE. Pointing angle and rotational orientation parameters are broadcasted to the PIEs, which then calculate, in parallel and in a distributed processing manner, the phase shifts associated with the various elements in their corresponding sub-arrays. Linearization, phase compensation for various factors (e.g., operating frequency, measured characteristics of individual RF elements, feed line delay to individual elements, etc.), and the initial phase shift calculations themselves are thus performed on essentially an element-by-element basis without requiring individual calculation hardware for each element. Array spoiling in response to real time array rotational orientation is provided. Update rates of greater than 10 kHz are attainable.
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patent: 4315262 (1982-02-01), Acampora et al.
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patent: 4445119 (1984-04-01), Works
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patent: 4733240 (1988-03-01), Bradley
Waldron et al., "Distributed Beamsteering Control of Distributed Phased Array Radars", 29 Microwave Journal, No. 9, pp. 133-146 (Sep. 1986).
Johnson Norman E.
Leddy Jeffrey A.
Rigg Steven H.
Blum Theodore M.
Electromagnetic Sciences, Inc.
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