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US 6,864,852 B2Granted
High gain antenna for wireless applications
AssigneeIPR Licensing, Inc.
InventorsBing Chiang, Michael James Lynch, Douglas Harold Wood
Life of this patent
Estimating the term…
Abstract
An antenna having a central active element and a plurality of passive dipoles surrounding the active element is disclosed. The passive dipoles increase the antenna gain by increasing the radiated energy in the azimuth direction. In another embodiment a plurality of parasitic directing elements extend radially outward from the passive dipoles.
Claims34
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.
4 more elements
An antenna comprising:
- an active element;
- a plurality of passive dipoles spaced apart from and circumscribing said active element;
- a plurality of first parasitic gratings spaced apart from and circumscribing said active element, with each first parasitic grating being disposed between two adjacent passive dipoles;
- and
- a controller for selectably controlling said plurality of passive dipoles to operate in a reflective or a directive mode.
2 more elements
An antenna comprising:
- a ground plane;
- a dielectric substrate adjacent said ground plane;
- an active element adjacent said dielectric substrate;
- a plurality of passive dipoles adjacent said dielectric substrate and being 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
- a first load,
- a second load, and
- a switch for connecting said first load to the upper segment so that said passive dipole operates in a reflective mode, and for connecting said second load to the upper segment so that said passive dipole operates in a directive mode.
6 more elements
Dependencies are inferred from the claim text.