Size Reduction of Microstrip Patch Antennas Using Slotted Complementary Split-Ring Resonators

In this paper, a novel design for miniaturization of microstrip patch antennas is proposed. The technique is based on etching out two Complementary Split-Ring Resonators (CSRRs) from the metallic ground plane beneath two non-radiating edges of the patch antenna. Numerical simulations are presented for a patch antenna with and without the CSRRs. The proposed design is cost effective and useful for miniaturization of patch antennas. Furthermore, unlike other miniaturization techniques that rely on either trial-and-error, optimization or randomly orienting the CSRRs beneath the patch antenna, the proposed approach serves as an effective design technique for size reduction of microstrip patch antennas.