A Fully Planar Near-Field Resonant Parasitic Antenna

Abstract

Abstract-A near-field resonant parasitic (NFRP) antenna is presented. Unlike the conventional NFRP antenna, which is fed by coaxial cables, the topology is driven by a planar "monopole". In this way, the antenna and the front end circuit can be designed in a single plane, which is crucial for system integration. The radiator is electrically small (λ 0 /19.3 × λ 0 /10.47 × λ 0 /76.4) while reaching a high efficiency (94%) and a good bandwidth (85 MHz). The operating frequency and input impedance are easily tailored. Measured results verify the working mechanism.