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Printed-circuit crossed-slot antenna

  • US 4,916,457 A
  • Filed: 06/13/1988
  • Issued: 04/10/1990
  • Est. Priority Date: 06/13/1988
  • Status: Expired due to Term
First Claim
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1. An antenna connectable to a radio communication device for transmitting or receiving a radio frequency signal, said antenna consisting of:

  • a first printed circuit board including a first non-conductive substrate and a conductive layer electro-deposited on a first face of the first non-conductive substrate, said conductive layer having first and second symmetrical slots cross-intersecting at right angles through their centers, each slot having equal leg portions on either side of the other slot;

    a second printed circuit board commensurate with said first printed circuit board, said second printed circuit board having a first side mounted against a second face of said first circuit board;

    an array of four symmetrical stripline feeders electrodeposited on said first side, one end of each feeder being positioned under one of said leg portions distally from said centers to electro-magnetically couple to said leg portion;

    printed circuit means for supplying quadrature phases of the signal to the stripline feeders;

    a conductive grounding layer coupled to said stripline feeders;

    means for holding said first and second printed circuit board, said means for supplying, and said ground layer in a stacked-layered configuration; and

    a conductive cage structure on the periphery of said first and second circuit boards.

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