Low profile, Wideband Crossed Dipole Antenna Utilizing Parasitic Helical Arms

This paper proposed a crossed dipole antenna with wide axial ratio bandwidth (ARBW), which combines a couple of crossed dipole and four parasitic helical arms (PHAs). In contrast to the previous planar parasitic elements, the PHAs parasitised in vertical contributes a compact size, 0.51×0.51×0.23λ
³
. Meanwhile, the PHAs produce three CP modes working with different mechanisms. The simulation shows this work obtains a 57.4% impedance matching bandwidth (IMBW), VSWR≤2: 1.68 GHz - 3.03 GHz, a 51.9% ARBW ranging from 1.85 GHz to 3.07 GHz, and an average gain of about 6 dBic.