Multi -frequency antenna device

The utility model discloses a multi -frequency antenna device sets up an at least first electrode layer and an at least the second electrode lay on an insulating body's first surface, the second electrode lay lies in the periphery on first electrode layer. Set up an at least the third electrode layer on insulating body's second surface, the first surface is separating two surfaces that this insulating body is relative with the second surface. A conductive element pierces through insulating body to connect the first electrode layer. An at least recess setting overlaps with the second electrodelay totally or partially in the projection of first surface at insulating body's side surface and / or second surface, recess. The first electrode layer can form different resonance frequency with thesecond electrode lay, and the setting through the recess can change the effective dielectric constant between the second electrode lay and the third electrode layer to the produced resonance frequency of adjustment the second