Multilevel antennae

  • US 7,528,782 B2
  • Filed: 07/20/2007
  • Issued: 05/05/2009
  • Est. Priority Date: 09/20/1999
  • Status: Expired due to Fees
First Claim
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1. An apparatus including a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set comprising;

  • at least one antenna element, wherein said at least one antenna element comprises a structure including at least two levels of detail, a first level of detail for an overall structure defined by a plurality of generally identifiable geometric elements and a second level of detail defined by a subset of the plurality of geometric elements forming said overall structure;

    wherein at least one of either a perimeter of contact or an area of overlap between said geometric elements is only a fraction of a total perimeter or a total area of the geometric elements, respectively, for a majority of said geometric elements such that it is possible to generally identify the majority of said plurality of geometric elements within said structure;

    a feeding point to said antenna element;

    a ground plane;

    wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands.

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