A new topology for the design of wide-beamwidth planar antennas is proposed in this paper. This new geometry uses conformal patches inserted in a machine ground plane. The two equivalent slotline apertures of this low Q-factor resonator are located on the ground plane level, with a horizontal orientation of radiating E-fields. This contributes to minimize the parasitic coupling effects when implementing a complete antenna array with such new basic element. In the same time, a significant size reduction of the patch is performed through the elongation path due to the geometry shape. The design methodology is presented as well as a comparison between a regular patch antenna and the proposed design. Technological orientations are discussed and validated through experiments.