Hybrid notch antenna

1. A hybrid notch antenna comprising:

a flared notch element provided from a member disposed in a first plane and having a notch therein;

at least two conductive walls disposed through, or attached to, the member on either side of the notch.

2. The antenna of claim 1 , wherein the at least two conductive walls form a transverse electromagnetic (TEM) horn structure integrated with the flared notch element.

3. The antenna of claim 2 , wherein the TEM horn structure is provided having a shape and position selected to affect an impedance of the hybrid notch antenna to extend a bandwidth of the hybrid notch antenna.

4. The antenna of claim 2 wherein a dielectric insulator is disposed in the notch of said flared notch element.

5. The antenna of claim 4 wherein said dielectric insulator encapsulates the notch of said flared notch element.

6. The antenna of claim 2 , wherein the flared notch element and the integrated TEM horn structure form a first antenna element.

7. The antenna of claim 6 further comprising additional transmit antenna elements, wherein each additional antenna element is formed from an additional flared notch element and an additional TEM horn structure.

8. The antenna of claim 6 further comprising second, third, and fourth antenna elements, wherein each of the second, third, and fourth antenna elements is formed from second, third, and fourth flared notch elements and TEM horn structures, respectively.

9. The antenna of claim 8 , wherein the first, second, third, and fourth transmit antenna elements are oriented to form a four-antenna rosette.

10. The system of claim 9 , wherein each of the plurality of hybrid TEM/notch antenna elements is configured to generate various polarizations in response to alternating amplitudes and phases.