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High gain antenna for wireless applications

  • US 6,864,852 B2
  • Filed: 05/23/2003
  • Issued: 03/08/2005
  • Est. Priority Date: 04/30/2001
  • Status: Expired due to Term
First Claim
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1. An antenna comprising:

  • an active element;

    a plurality of passive dipoles spaced apart from and circumscribing said active element, each passive dipole comprising an upper segment and a lower segment; and

    a controller for selectably controlling said plurality of passive dipoles for operating in a reflective mode or a directive mode, said controller comprising for each respective passive dipole an inductive load, a capacitive load, and a switch for connecting said inductive load to the upper segment so that said passive dipole operates in a reflective mode, and for connecting said capacitive load to the upper segment so that said passive dipole operates in a directive mode.

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