Frequency Agile, Sub-wavelength, Metamaterial-inspired Huygens Dipole Antenna

Near-field resonant parasitic based Huygens sources have been of special interest in many antenna applications recently. Unidirectional patterns with high directivity, high radiation efficiencies and large front-to-back-ratio values, as well as compact dimensions, have made them an attractive choice for space-limited wireless platforms. It is demonstrated with CST simulations that the frequency of operation of a sub-wavelength, metamaterial-inspired Huygens dipole antenna and, hence, its cardioid pattern, can be easily adjusted across a broad bandwidth using tunable lumped reactive elements.