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Rotatable contactless antenna coupler and antenna

  • US 5,014,346 A
  • Filed: 01/04/1988
  • Issued: 05/07/1991
  • Est. Priority Date: 01/04/1988
  • Status: Expired due to Term
First Claim
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1. A portable radio comprising:

  • a housing;

    a hinged flip portion attached to said housing by hinge means for permitting rotation about an axis formed by said hinge means and said housing;

    signal processing means for processing RF signals disposed within said housing;

    a first antenna disposed within said hinged flip portion; and

    coupling means for coupling R.F. signal between said first antenna and said signal processing means partially disposed coaxially within said hinge means, said coupling means comprising a first transformer having a primary coil means and secondary coil means, said primary coil means coupled to said signal processing means, said secondary coil means coupled to said first antenna, said primary coil means and said secondary coil means being positioned coaixally with said hinge means such that substantially constant inductive coupling there between is maintain over a range of rotation and substantially constant signal coupling between said fist antenna and said signal processing means occurs regardless of rotation.

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