An antenna for supporting a wireless system, which can in one example, be operable in two industrial, scientific and medical (“ISM”) bands, may include a first radiator and a second radiator, and a single feed transmission section coupled to the first radiator and the second radiator. The antenna can, for example, be formed of a unitary planar structure. The antenna may be configured to fit within a chassis, which in one example, can be a chassis for a wireless receiver in a microphone.