Low-Profile Dual Circularly Polarized Antenna Array Element

In this paper presents a design and characteristics of a low-profile dual circularly polarized antenna array element. The antenna array element is a square strips with the cutouts and fed by two coaxial cables. The operation frequency range on the level of the VSWR less than 3 and S(1,2) less than −10 dB is from 1.84 to 3.40 GHz (~85% relative to 3.40 GHz) with a radiated power is more than 0.7 W (the input power is equal to 1 W) and an axial ratio is less than 1.89. The antenna array element is the low-profile (height is equal to 10 mm or
$0.12\lambda$
at 3.40 GHz). In the frequency range from 2.18 to 2.44 GHz the VSWR is less than 1.86, an axial ratio is less than 1.2, S(1,2) is less than −13.5 dB and the radiated power is more than 0.89 W.