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Network-fed phased array antenna system with intrinsic RF phase shift capability

  • US 3,969,729 A
  • Filed: 03/17/1975
  • Issued: 07/13/1976
  • Est. Priority Date: 03/17/1975
  • Status: Expired due to Term
First Claim
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1. An integral antenna element and RF phase shifter particularly for use as a controllable element in a phase scanned array fed from an RF transmission line of a type selected from a group including waveguide and stripline, said transmission line having longitudinal conductive outer walls through which RF energy may be coupled by means of slots, comprising:

  • means including a pair of slot patterns through one of said outer walls, the slots of said patterns being placed symmetrically about the longitudinal centerline of said one outer wall, each of said slot patterns thereby capable of providing coupling on both sides of said longitudinal centerline of said outer wall;

    and means including at least four RF devices each of a type capable of providing a controlled RF admittance path for providing admittance ranging at least between discrete minimum and maximum values as a function of a corresponding control signal applied thereto, at least two of said RF devices being placed to control corresonding admittance paths within one of said slot patterns with one of said RF devices on each side of said longitudinal centerline of said outer wall.

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