Circularly polarized loop and helix panel antennas
OwnerRaymond H. DuHamelinventor
Life of this patent
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Abstract
An antenna including a conductive support for supporting a plurality of radiating elements in line next to one another above the conductive support and transmission lines serially connecting the radiating elements. The radiating elements of the loop or helix type with a turn length of substantially one wavelength at the operating frequency and configured to support the equivalent of a ring of current with a traveling wave to radiate circularly polarized radiation.
Claims34
A circularly polarized antenna assembly comprising a conductive plane, a plurality of adjacent radiating elements each comprising at least one open radiating loop all portions which lie substantially in a plane, means for supporting each of said radiating elements above said conducting plane in line next to one another with the plane of said at least one loop being substantially parallel to the conducting plane, transmission line means connecting said radiating elements in series from one opened end of the loop to an adjacent loop and means for feeding one end of said series of radiating elements, the impedance of said transmission lines and radiating elements selected so that the radiating elements each support a traveling electrical wave equivalent to a traveling wave on a ring to produce circularly polarized radiation.
A circularly polarized antenna assembly including two antenna assemblies as in cliam 1 extending in line away from one another and common means for feeding the said two antenna assemblies.
A circularly polarized antenna assembly comprising a conductive plane, two series of radiating elements, each series including radiating elements supported above said conductive plane in line next to one another, each of said radiating elements comprising a loop lying in a plane which is substantially parallel to the conductive plane, said two series of radiating elements having one end adjacent to one another with the other end of each series extending away from said adjacent ends, said radiating elements being at increased heights away from said adjacent ends, transmission line means connected to feed one end of the first of said radiating elements at said one end of each series and transmission line means interconnecting the loops in each series so that the radiating elements are connected in series along the transmission lines, said transmission line means and radiating elements selected so that the impedance of said transmission line means and radiating elements support selected so that the radiating loops support a traveling wave to produce circularly polarized radiation.
Dependencies are inferred from the claim text.