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Antenna having elements with programmable digitally generated time delays

  • US 5,130,717 A
  • Filed: 04/29/1991
  • Issued: 07/14/1992
  • Est. Priority Date: 04/29/1991
  • Status: Expired due to Term
First Claim
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1. In an antenna array having a plurality of antenna elements, an elemental signal processor for association with one of said antenna elements and for inserting a programmable delay into an information signal passed through said one element, said element signal processor comprising:

  • means for providing a digitized waveform corresponding to said information signal, said digitized waveform comprising a sequence of samples exhibiting a predetermined period between adjacent ones of said samples;

    means for supplying first and second delay values wherein said first and second delay values together specify a total relative delay to apply to said information signal in said one element;

    first means, coupled to said providing means and to said supplying means, for delaying said digitized waveform by a first duration which is responsive to said first delay value, said first duration being substantially an integral number of said predetermined periods; and

    second means, coupled to said supplying means, for delaying said digitized waveform by a second duration which is responsive to said second delay value, said second duration being less than said predetermined period.

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