A paste composition for an electrode of a solar cell according to the present invention comprises a conductive powder, an organic vehicle, and a glass frit, and the glass frit includes a first glass frit having a first glass transition temperature and a second glass frit having a second glass frit temperature lower than the first glass transition temperature. The method is applicable for a variety of alloys including, but not limited to, copper-based, iron-based, nickel-based, other metallic-based alloys, and their combinations. The floating coupling element is electrically isolated from the resonant structure; its presence provides an improved impedance match to the RFID load element.