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Locator for source of electromagnetic radiation having unknown structure or orientation

  • US 4,328,548 A
  • Filed: 04/04/1980
  • Issued: 05/04/1982
  • Est. Priority Date: 04/04/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for determining the position of a source of electromagnetic radiation relative to a remote object and the orientation of the remote object relative to the position of the source comprising:

  • a multicomponent radiating means of unknown orientation and structure identifying the origin of said source;

    transmitter means for applying to said multicomponent radiating means electrical signals which generate a plurality of electromagnetic fields, said plurality of electromagnetic fields being distinguishable from one another;

    a plurality of receiving means disposed on said remote object, said receiving means having at least three orthogonal components for detecting and measuring components of said electromagnetic fields;

    said radiating means and said receiving means being adapted for operation at a separation distance sufficient to insure that the far-field components of said electromagnetic fields are substantially greater in magnitude than the near-field components of said electromagnetic fields; and

    analyzing means associated with said receiving means for converting the components of said electromagnetic fields received by said plurality of receiving means into source position relative to said remote object without a priori knowledge of the orientation of said source or the relative orientation of its components with at least one ambiguous combination of orientation or position, said analyzing means comprising means for operating open loop with respect to said radiating means.

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