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Multilevel antennae

  • US 8,154,462 B2
  • Filed: 02/28/2011
  • Issued: 04/10/2012
  • Est. Priority Date: 09/20/1999
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • 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 that operates in two or more frequency bands;

    wherein said passive antenna set comprises at least one antenna element, a feeding point to said antenna element, and a ground plane;

    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 anda second level of detail defined by a subset of the plurality of geometric elements forming said overall structure;

    wherein said structure does not define a self-similar fractal 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;

    wherein said plurality of generally identifiable geometric elements are electromagnetically coupled to each other such that said at least one antenna element is not composed of a plurality of substantially isolated single band antenna elements, each of said single band antenna elements operating in one of said two or more frequency bands;

    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 said two or more frequency bands such that the passive antenna set transmits and receives 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;

    wherein said wireless communications device is a handset;

    wherein said internal antenna system includes an interconnection circuit that links the antenna element to the input/output port, and which is used to incorporate adaptation networks for impedances; and

    wherein said wireless communication device operates at multiple frequency bands, and wherein at least one of said frequency bands is operating within the 800 MHz-3600 MHz frequency range.

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