Dual band frequency selective radiator array

A dual band frequency selective radiator array for transmitting and receiving radar signals comprising:

• a high band radiator array disposed on a dielectric layer for transmitting and receiving high band radar signals;
• a low band radiator array disposed on a front side of the high band radiator array for transmitting and receiving low band radar signals;
• a frequency selective surface (FSS) tuned to the high band radar signals forming a surface of the low band radiator array that passes the high band radar signals to the high band radiator array;
• and
• a single aperture disposed in front of the low band radiator array, the high band radiator array and the FSS for both the low band radiator array and the high band radiator array for transmitting and receiving the radar signals, wherein
• the low band radiator array includes a plurality of tuning stubs tuned to high band frequencies to make the low band radiator array transparent to the high band radiator array.