Patent ID: 8125391

Claim:
A patch antenna for a small size, low-power device adapted for transmitting or receiving electromagnetic radiation in a predefined frequency range, comprising: at least one patch comprising an electrically conductive material and having an upper and lower face, the at least one patch being supported on its lower face by an intermediate material including first and second different materials, at least one being a material having a negative magnetic permeability μ and/or a negative electrical permittivity ∈, at least over a part of the predefined frequency range, wherein the patch antenna has a first resonance frequency and a second resonance frequency, the first resonance frequency is governed by the form and size of the at least one patch, the second resonance frequency is based on geometrical relations between the first and second different materials, and the second resonance frequency is in a frequency range where the magnetic permeability μ or electrical permittivity ∈, or both, of the intermediate material are negative.