Abstract A wideband planar antenna. which is composed of a ground plate and a strip surrounding the plate. is proposed. Wideband impedance matching with fractional bandwidth over 130% is achieved by making the distance between the strip and the ground plate stepwise so that the distance becomes wider in the tip side. https://www.bekindtopets.com/hot-mega-Swish-Supreme-Glide-Track-White-great-pick/