Spherical resonator frequency selective surface

A method of forming a frequency selective surface comprising:

• arranging a plurality of spherically shaped conductive resonators to form a periodic array of rows and columns;
• conforming the periodic array to a non-planar surface which has at least one surface contour;
• selecting a diameter of the spherically shaped conductive resonators and a spacing between adjacent ones of the spherically shaped conductive resonators in forming the array to obtain a predetermined frequency response for the frequency selective surface;
• and
• maintaining a positional relationship among the spherically shaped conductive resonators in the rows and columns by securing the plurality of spherically shaped conductive resonators using a registration structure.