Accession Number : ADD012365

Title :   Temperature and Frequency Compensated Array Beam Steering Unit.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Claborn,Kenneth D ; Bailey,William C

Report Date : 30 Apr 1986

Pagination or Media Count : 18

Abstract : Beam pointing errors and sidelobes resulting from temperature variations on the aperture and power divider of a series phased array antenna operating at a plurality of selected operating channel frequencies and having uniformly spaced elements are compensated for by placing a temperature sensor on both the aperture and power divider and converting the respective temperature outputs to digital signals which are fed to a digital beam steering unit. A pair of programmed memories are included in the beam steering unit which respond to an address or pointer corresponding to the digitized temperature values and the selected operating frequency to read out stored digitized beam steering phase gradients and feed phase correction which are combined and sequentially applied at regular intervals to symmetrically located phase shifter pairs. A uniformly compensated beam is thereafter radiated at a predetermined phase angle.

Descriptors :   *PATENT APPLICATIONS, *BEAM STEERING, *SIDELOBES, *POWER DIVIDERS, ERRORS, CHANNELS, FREQUENCY, CORRECTIONS, FEEDING, PHASE SHIFT CIRCUITS, TEMPERATURE, VARIATIONS, DIGITAL SYSTEMS, OUTPUT, SIGNALS, ANGLES, PHASE, DETECTORS, TEMPERATURE SENSITIVE ELEMENTS

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE