A novel compact and superdirective two elements antenna array

Abstract

In this work, the design of a superdirective and compact two elements antenna array is reported. This antenna system is based on a capacitively loaded loop (CLL) driven by an electrically small monopole antenna. This elementary antenna is then used in a two elements compact parasitic array, in order to achieve a higher directivity. The two elements of this array are identical, but only one of them is driven, the other one is used as a parasitic element. The design of the elementary antenna, its simulated radiation performance, as well as those of the parasitic array are reported. Two corresponding prototypes were fabricated and tested. The measured impedance mismatch and radiation pattern results are presented and are shown to be in good agreement with their simulated values.