Passive RF path diverter
AssigneeMotorola, Inc.
InventorsCharles R. Bitter, Jr., Raymond M. Cripps
Life of this patent
Estimating the term…
Abstract
A passive device is taught which diverts radio-frequency electromagnetic energy from an original path to a new path at a 90.degree. angle. The device eliminates the large reflective sheets which characterize prior art devices for the same purpose. The device utilizes a modified Yagii-Uda parasitic array to excite a cross-dipole element which reradiates the energy along the new direction. A particular application is shown for placing the device in or on a wall or the like for unobtrusive diversion of energy.
Claims8
Apparatus for diverting RF energy of a predetermined wavelength comprising:
- a first substantially linear passive element;
- a second substantially linear passive element, said second passive element being parallel to said first passive element and at a distance of approximately one wavelength therefrom, said first and second passive elements lying in a plane of the apparatus;
- at least one additional substantially linear passive element, said at least one additional passive element being parallel to said first and second passive elements and lying in said plane of the apparatus, said at least one additional passive element being placed approximately one-quarter wavelength beyond said second passive element;
- a first dipole having two colinear portions lying in the plane of the apparatus and being approximately centered between said first passive element and said second passive element, said colinear portions being parallel to said passive elements;
- and
- a second dipole having two non-colinear portions connected to said first dipole portions, said second dipole portions lying in said plane of the apparatus and being perpendicular to said passive elements.
A passive RF path diverter comprising:
- at least one reflector element;
- at least one director element;
- and
- a cross-dipole element, all said elements being substantially coplanar, said cross-dipole element being disposed between said at least one reflector element and said at least one director element.
A passive apparatus for diverting RF energy from an original direction of propagation comprising:
- means for radiating RF energy in a direction approximately 90 degrees from said original direction of propagation;
- means for responding to RF energy propagating in said original direction and for driving said radiating means, said responding means and said radiating means lying substantially in a plane containing said original direction of propagation.
Dependencies are inferred from the claim text.