Polarimetric dual band radiating element for synthetic aperture radar
AssigneeEMS Technologies Canada, Ltd.
InventorPeter C. Strickland
Life of this patent
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Abstract
A dual band, dual polarized antenna comprising an array of resonators in a plane for radiating at a first frequency, a ring resonator in a plane, the array of resonators being contained within a projection of the boundary of the ring resonator, the ring resonator for radiating at a second frequency which is lower than the first frequency, apparatus for exciting the array of resonators to cause them to radiate at the first frequency with dual polarizations simultaneously, and apparatus for exciting the ring resonator to cause it to radiate at the second frequency with dual polarizations simultaneously.
Claims19
A dual band, dual polarized antenna comprising:
- (a) an array of similarly oriented resonators in a plane for radiating at a first frequency,
- (b) a ring resonator in a plane, the array of resonators being contained within a projection of the boundary or the ring resonator, the ring resonator for radiating at a second frequency which is lower than the first frequency,
- (c) means for exciting the array of resonators to cause them to radiate at the first frequency in an electrically controllable direction with dual polarizations simultaneously, and
- (d) means for exciting the ring resonator to cause it to radiate at the second frequency with dual polarizations simultaneously.
A dual band, dual polarized antenna comprising:
- (a) an array of similarly oriented resonators for radiating at a first frequency,
- (b) a ring resonator which is parallel to a rectangle surrounding the array of resonators, the ring resonator for radiating at a second frequency which is lower than the first frequency,
- (c) means for applying signals to the array of resonators to cause them to radiate in an electrically controllable direction at the first frequency with dual polarizations simultaneously,
- (d) means for applying signals to the ring resonator to cause it to radiate at the second frequency with dual polarizations simultaneously, and
- (e) a groundplane spaced from the array of resonators and the ring resonator by a dielectric.
A dual band, dual polarized antenna comprising:
- (a) an array of resonators in a plane for radiating at a second frequency which is lower than the first frequency,
- (b) a ring resonator in a plane, the array of resonators being contained within a projection of the boundary of the ring resonator, the ring resonator for radiating at a second frequency which is lower than the the first frequency,
- (c) means for exciting the array of resonators to cause them to radiate at the first frequency with dual polarizations simultaneously,
- (d) means for exciting the ring resonator to cause it to radiate at the second frequency with dual polarizations simultaneously, and
- (e) means for supporting the array of resonators in a different plane than the ring resonator.
Dependencies are inferred from the claim text.