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Apparatus for receiving and transmitting radio signals

  • US 6,252,549 B1
  • Filed: 02/24/1998
  • Issued: 06/26/2001
  • Est. Priority Date: 02/25/1997
  • Status: Expired due to Term
First Claim
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1. An antenna unit for transmitting and receiving radio signals, comprisinga first antenna element for transmitting and receiving in a first polarization direction with a first beam width;

  • and a second antenna element for transmitting and receiving in a second polarization direction with a second beam width, wherein the first antenna element is a single microstrip element comprising a radiating element of the type surface element, the second antenna element is a single slot in an earth plane, each of the first and second antenna elements is arranged to transmit and receive only one polarization direction, the first and second antenna elements are arranged in a one-to-one relationship, and the first and second beam widths are wider than 70 degrees.

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