An antenna assembly is mountable to a craft. The craft has a power source. The antenna assembly includes a base securable to the craft. A monopole post extends out from the base. A plurality of voltage lines extend through the base and the monopole post. The antenna assembly also includes a plurality of capacitors operatively connected to the monopole post. Each of the capacitors is electrically connected to each of the plurality of voltage lines. The plurality of capacitors extend through serpentine paths distributing electrical charge across the plurality of capacitors to vary reactance properties of the antenna assembly.