Patent ID: 7821460

Claim:
A tunable planar half-wave patch antenna, comprising a plurality of layers arranged along an axis (Z) with or without a lateral offset with respect to one another, comprising: an electrically conductive ground surface, a dielectric carrier provided on the electrically conductive ground surface, said dielectric carrier having an upper side, and also having a lower side facing the ground surface, a conductive effective surface provided on the upper side of the dielectric carrier, the conductive effective surface being electrically connected to an electrically conductive feed line, an electrically conductive structure arranged, in relation to the ground surface, on the opposing side of the effective surface with a lateral spacing with respect thereto, the electrically conductive structure at least partially covering the conductive effective surface in plan view perpendicular to the effective surface, a carrying device holding the electrically conductive structure at a lateral spacing with respect to the effective surface, and the electrically conductive structure being galvanically or capacitively or serially connected, with interposition of at least one electric component, to the ground surface or a chassis located on a potential or ground, wherein the dielectric carrier occupies the space between the ground surface and the electrically conductive structure so the electrically conductive structure completely covers the effective surface and there is no air-filled cavity between the conductive effective surface and the ground surface.