A Low Profile Magneto-electric Dipole Antenna based on Spoof Surface Plasmon Polaritons

A novel low profile magneto-electric (ME) dipole antenna based on spoof surface plasmon polaritons (SSPPs) is proposed. The magneto and electric dipole of the ME antenna both are composed of slow-wave SSPPs structure, which effectively decrease the size of the antenna. A coplanar waveguide (CPW) is used to transform the guided wave into slow-wave to further expand the impedance bandwidth. An antenna prototype is designed and simulated. Simulated results show that the designed antenna achieves an impedance bandwidth of 22.8% for V SWR < 2 from 2.44 to 3.07 GHz and 7.8% 1-dB gain bandwidth from 2.44 to 2.65 GHz with a low profile height (0.10 lambda(0), lambda(0) is the wavelength of 2.55GHz) and high front-to-back ratios.