Split ring resonator-based miniaturized antennas

Two miniaturized microstrip-fed antennas composed of broadside coupled split ring resonators and excitation arc-shaped monopoles are presented. Numerical and experimental results are presented for an antenna configuration of 1/28 wavelength in diameter (ka∼0.1125). The antenna size including the ground plane is 60×38.5 mm2 for both antennas while their operating frequencies are 200 MHz and 179 MHz. The resonant frequency can be tuned over a good range of frequency without changing the antenna size, which can increase its usable bandwidth using reconfigurable antenna techniques.