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US 7,009,571 B2Granted
Method and apparatus for forming symmetrical energy patterns in beam forming antennas
AssigneeBWA Technology, Inc.
InventorJay McCandless
Life of this patent
Estimating the term…
Abstract
A method and apparatus by which electromagnetic wave energy is passed through a beam-forming antenna thereby forming a capacitive surface reactance which eliminates E-plane edge currents on the antenna and balances hybrid electromagnetic energy modes resulting in symmetrical electromagnetic wave patterns.
Claims26
An antenna comprising:
- a plate having forward facing and reverse facing flat surfaces;
- each of said surfaces defining a centrally located generally rectangular opening forming a passage through said plate, said passage having substantially constant dimensions;
- said forward facing surface having a slot adjacent to each elongated side of said generally rectangular opening;
- and
- said slots being disposed an equal distance from said rectangular opening,
- whereby a capacitive surface reactance is formed when electromagnetic wave energy is passed through said passage.
3 more elements
An antenna for radiating an electromagnetic signal with a symmetrical radiation pattern at a predetermined wavelength and at a predetermined beamwidth, comprising:
- a plate having forward facing and reverse facing flat surfaces wherein said plate defines a centrally located, generally rectangular opening forming a passage having substantially constant dimensions though said plate wherein said opening has:
- a width that is a function of said wavelength, and
- a length that is a function of said beamwidth;
- and,
- said forward facing surface having a slot adjacent to but spaced apart from each elongated side of said opening, wherein each of said slots has:
- a width that is a function of said wavelength,
- a length that is a function of at least said beamwidth,
- a depth that is a function of said wavelength, and,
- a spacing apart from said opening that is a function of said wavelength,
- whereby a capacitive surface reactance is formed when electromagnetic wave energy is passed through said opening to thereby radiate an electromagnetic signal with a symmetrical radiation pattern.
7 more elements
Dependencies are inferred from the claim text.