In this abstract we present a one-dimensional leakywave antenna fed from two ports that provides a dual-polarized radiation pattern. It is the first time that dual-polarized radiation is achieved from a single one-dimensional leaky-wave radiating aperture. This simple and robust antenna provides high gain in both horizontal and vertical linear polarization with low cross-polarization levels (below -40dB) which makes it potentially suitable for applications such as polarimetric radars