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Undersampled microstrip array using multilevel and space-filling shaped elements

  • US 7,310,065 B2
  • Filed: 01/12/2005
  • Issued: 12/18/2007
  • Est. Priority Date: 07/15/2002
  • Status: Expired due to Term
First Claim
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1. An antenna array comprising:

  • patch antenna elements having one of the following shapes;

    multilevel, space-fillings, or multilevel and space-filling;

    the patch antenna elements being adapted to operate at a superior frequency mode, the superior frequency mode being at a frequency of a fundamental mode of the patch antenna elements;

    the patch antenna elements featuring a higher directivity when operating at the superior frequency mode than the directivity obtained when the patch antenna elements operate at the fundamental mode;

    the patch antenna elements being larger than half of a wavelength,the wavelength being an operating wavelength of the antenna as measured in a dielectric located between at least one patch antenna element and its compounding groundplane; and

    the patch antenna elements being spaced in at least one direction at a distance larger than λ

    from closest neighbors, λ

    being a free-space operating wavelength of the antenna array.

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