Electronic device with foot antenna

Abstract

An electronic device may include a housing and wireless circuitry. The housing may include a conductive body mounted to a dielectric foot. The wireless circuitry may include wedge-shaped cavity-backed antennas mounted within the dielectric foot. Each antenna may include a dielectric wall, a conductive plate, and a conductive cavity mounted to the conductive plate. The conductive cavity and the conductive plate may define edges of an antenna cavity. The dielectric wall may be mounted to the conductive plate and the conductive cavity overlapping the antenna cavity. The dielectric wall may have an outer surface with a continuous curvature that matches a curvature of the dielectric foot. The dielectric wall may have an inner surface facing the antenna cavity. An antenna resonating element may be mounted to the inner surface. The antenna resonating element may include planar segments separated by folds to help approximate the continuous curvature of the outer surface.