The invention relates to an improved structure of a
chip antenna. The improved structure comprises a substrate, at least one matching element, a
radiation monomer and a
frequency modulation element, wherein the substrate is provided with a first
ground plane, a first clearance zone and a
signal feed-in unit, and the other side of the substrate is provided with a second
ground plane corresponding to the first
ground plane, a second clearance zone corresponding to the first clearance zone, a third ground plane arranged in the second clearance zone, and a plurality of through substrates electrically connected with the first ground plane and the second ground plane. The matching element is electrically connected between the
signal feed-in unit and the first ground plane. One end of the
radiation unit is electrically connected with the
signal feed-in unit through the via hole, and the other end of the
radiation unit is electrically connected with the third ground plane. The
frequency modulation element is electrically connected between the second ground plane and the third ground plane so as to adjust the
frequency modulation element, i.e., the transceiving frequency of the antenna canbe adjusted.