Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines

Abstract From the Canadian patent

A printed-circuit antenna array having broadband linear polarization, and circular polarization with high polarization purity, feedlines of the array being capacitively coupled to feeding elements at a single feedpoint or at multiple feedpoints, the feeding elements in turn being electromagnetically coupled to corresponding radiating elements. The radiating elements may be patches, disposed on a dielectric board which is contactlessly coupled to another board containing the feeding elements, in accordance with a first embodiment of the invention. Alternatively the, radiating elements may be slots, formed by an absence of material in ground planes which are formed on the same dielectric …