Patent ID: 7132985

Claim:
An ultra wideband planar printed volcano antenna comprising a printed circuit board with an antenna unit formed on one surface thereof and a grounding unit formed on the opposing surface thereof, wherein the antenna unit includes an electrically conductive radiating element and the rest of the surface of the printed circuit board where the antenna unit is located forms a first electrically nonconductive open area with a first contour formed between the first open area and the radiating element, and the grounding unit includes an electrically conductive grounding element and the rest of the surface of the printed circuit board, where the grounding unit is located forms a second electrically nonconductive open area with a second contour formed between the second open area and the radiating element and extending upward to the two sides of the printed circuit board without fully enclosing said antenna unit, and wherein the first and the second open areas overlap to each other to have a gradually narrowing adjustable space formed between the radiating element and the grounding element.