SRR having ground plane or not??????????

i designed CSRR, in my design i used substrate(FR4-epoxy),strip line(copper) and ground plane(copper).i etched the rings structers from the ground plane(copper).
now iam designing the SRR,first i took one substrate(FR4-epoxy) after this idesigned rings(copper) structer on the substrae my doubt is ground plane is requred or not at the other side of substrate.please help me asap..
thankyou....

Dear,
There is no need for Ground Plane for an SRR.
SRR in principle working in magnetic field , and it show some inductance , while the capacitance is formulated between the gap edge.

best regards