Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1986-04-07
1987-06-02
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342408, 342 35, H01Q 322, H01Q 324, H01Q 326
Patent
active
046707565
ABSTRACT:
A scanning system for a phased array antenna for operation at a selected frequency between a first frequency and a second frequency includes the storage of phase shift command signals for each of the phase shifters coupled to radiating elements of the antenna. The memory which stores the phase shift commands is addressed sequentially to provide for a step-wise scanning of a beam of radiant energy at a first frequency of the antenna. The addressing is accomplished by incrementing a count resulting from a counting of clock pulses. Compensation for the stepped positions of the beam for the difference between the selected frequency and the first frequency is accomplished by altering the number of pulses which increment the count of the addressing. The altering is accomplished by the storing of sequences of clock pulses at varying temporal spacings which are used for gating out selected ones of the incrementing pulses.
REFERENCES:
patent: 4166274 (1979-08-01), Reudink et al.
patent: 4445119 (1984-04-01), Works
Agovino F. R.
Blum Theodore M.
Hazeltine Corporation
Onders E. A.
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