Planar scanner antenna for high frequency scanning and radar environments
View Patent ↗A planar scanning antenna is configured for scanning and tracking. In one embodiment, the planar scanning antenna may include a transducer module configured to provide an electromagnetic beam. According to another aspect of the invention, the apparatus may include a first planar dielectric element having an axis of rotation and configured to direct an electromagnetic beam. In one embodiment, a second planar dielectric element oriented adjacent to the first planar dielectric element and having the axis of rotation may be configured to direct electromagnetic energy. The apparatus may further include a mounting structure arranging the transducer module and the first and second planar dielectric elements. In yet another embodiment, the apparatus may include a drive means for positioning the first planar dielectric element independently from the second planar dielectric element.
1. A planar scanning antenna, which comprises:
a transducer module configured to provide an electromagnetic beam;
a first planar dielectric element having an axis of rotation and configured to direct said electromagnetic energy, said first planar dielectric element being coupled to an inner cylindrical drive tube; and
a second planar dielectric element oriented adjacent to said first planar dielectric element, having said axis of rotation and configured to direct said electromagnetic energy, said second planar dielectric element being coupled to an outer cylindrical drive tube;
a mounting structure positioning said first and second planar dielectric elements, said mounting structure comprising said inner drive tube and said outer drive tube, said outer drive tube concentrically overlying said inner cylindrical drive tube; and
a drive means for positioning said first planar dielectric element independently from said second planar dielectric element using said inner and outer cylindrical drive tubes.
2. The planar scanning antenna of claim 1 , wherein said transducer module comprises a collimated beam source.
3. The planar scanning antenna of claim 2 , wherein said collimated beam source comprises at least one of a slotted array, a parabolic reflector, and a micropatch array.
4. The planar scanning antenna of claim 2 , wherein said transducer module comprises a twist cassegrain configuration.
5. The planar scanning antenna of claim 1 , wherein said drive means further provides independent rotation of said first and second planar dielectric elements about an axis normal to said transducer module.
6. The planar scanning antenna of claim 1 , wherein at least one of said first and second planar dielectric elements is a stepped lens.
7. The planar scanning antenna of claim 1 , wherein said transducer module comprises an electromagnetically loading structure.
8. The planar scanning antenna of a claim 1 , wherein said mounting structure is configured to be flush mounted.
9. The planar scanning antenna of claim 1 , wherein said antenna is configured to provide an antenna scan pattern defined by
(sin(θ max ))=sin(θ element 1 )+sin(θ element 2 )),
wherein,
θ element 1 =angular offset imparted by the first planar dielectric element,
θ element 2 =angular offset imparted by the second planar dielectric element, and
θ max =resultant angular offset.
10. A mounting structure which comprises:
a transducer module comprising an electromagnetically loading structure, said transducer module configured to provide at least one of generating and receiving a beam source;
a first planar dielectric element configured to direct electromagnetic energy, said first planar dielectric element being coupled to an inner cylindrical drive tube;
a second planar dielectric element configured to direct electromagnetic energy, said second planar dielectric element being coupled to an outer cylindrical drive tube, said outer cylindrical drive tube concentrically overlying said inner cylindrical drive tube; and
a drive module configured to independently position said first planar dielectric element and said second planar dielectric element using said inner and outer cylindrical drive tubes such that said first and second planar dielectric elements direct said beam source.
11. The mounting structure of claim 10 , wherein said beam source is at least one a slotted array, a parabolic reflector, a collimated beam source, and a micropatch array.
12. The mounting structure of claim 10 , wherein said drive module provides independent rotation of said first and second planar dielectric elements.
13. The mounting structure of claim 10 , wherein at least one of said first and second planar dielectric elements comprises a stepped lens.
14. The mounting structure of claim 10 , wherein said beam source comprises a FLAPS technology surface.
15. The mounting structure of claim 10 , wherein said beam source comprises a foam spacer.
16. The mounting structure of claim 10 , wherein said beam source is a twist cassegrain configuration.
17. The mounting structure of claim 10 , wherein said mounting structure is configured to be flush mounted.
18. The mounting structure of claim 10 , wherein said first and second planar dielectric elements are configured to provide an antenna scan pattern defined by
(sin(θ max ))=sin(θ element 1 )+sin(θ element 2 )),
wherein,
θ element 1 =angular offset imparted by the first planar dielectric element,
θ element 2 =angular offset imparted by the second planar dielectric element, and
θ max =resultant angular offset.