Annular slot patch excited array

An antenna for transmitting and receiving a plurality of wavelengths of electromagnetic radiation comprising;

• a ground plane;
• a plurality of arrays of radiating/receiving elements disposed in said ground plane, each array of said plurality being adapted to radiate/receive a selected wavelength of electromagnetic radiation;
• and
• a first dielectric core disposed on over said ground plane, said first dielectric core having a first bottom, a first top and a first thickness, a first patterned reflective surface on said first bottom and a second patterned reflective surface on said first top, said first patterned reflective surface being positioned one-half of a first selected wavelength above said ground plane, said first thickness being adapted so that said second patterned reflective surface is one-half of a second selected wavelength above said ground plane, wherein each of said first patterned reflective surface and said second patterned reflective surface comprises a plurality of conductive elements having a length, a width and a spacing corresponding to said first selected wavelength and said second selected wavelength, respectively.

A method for making an antenna for transmitting or receiving a plurality of wavelengths of electromagnetic radiation which comprises:

• forming a plurality of arrays for radiating/receiving elements in a ground plane;
• selecting a first dielectric core with a thickness equal to the difference between one-half of a first selected wavelength and one-half of a second selected wavelength;
• forming a first patterned reflective surface on a bottom of said first dielectric core, wherein said first patterned reflective surface comprises a plurality of conductive elements having a length, a width and a spacing corresponding to said first selected wavelength;
• forming a second patterned reflective surface on a top of said dielectric core, wherein said second patterned reflective surface comprises a plurality of conductive elements having a length, a width and a spacing corresponding to said second selected wavelength;
• and
• attaching said first dielectric core with said bottom one-half of said first selected wavelength above said ground plane.