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Vertical multiple-input multiple-output wireless antennas

  • US 9,577,346 B2
  • Filed: 09/18/2008
  • Issued: 02/21/2017
  • Est. Priority Date: 06/24/2005
  • Status: Expired due to Fees
First Claim
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1. A multiple-input multiple-output (MIMO) antenna system, comprising:

  • a data encoder that encodes data to be transmitted to a receiving node via radio transmission;

    a plurality of parallel radios coupled to the data encoder, wherein each of the plurality of parallel radios up-converts the data from the encoders into RF signals;

    a MIMO antenna apparatus including a first plurality of antenna elements that each generate a horizontal radiation pattern when selectively coupled to the plurality of parallel radios and a second plurality of antenna elements that each generate a vertical radiation pattern when selectively coupled to the plurality of parallel radios, wherein the plurality set of antenna elements disposed separately from the second plurality of antenna elements, wherein the first plurality of antenna elements are formed as slots on a printed circuit board (PCB), each slot including a plurality of fingers to change resonance and reduce a size of said each slot, and wherein the second plurality of antenna elements are formed as dipoles on the PCB; and

    a controller for selectively coupling each of the first and second plurality of antenna elements to one or more of the parallel radios, wherein when two or more of the first plurality of antenna elements are selected, the MIMO antenna apparatus forms a substantially omnidirectional radiation pattern with horizontal polarization, and when two or more of the second plurality of antenna elements are selected, the MIMO antenna apparatus forms a substantially omnidirectional radiation pattern with vertical polarization.

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