Patent ID: 7893385

Claim:
A method for enhancing the gain and range of RFID antennas and facilitating the production of RFID antennas that do not detune in the presence of other antennas said system comprising: providing sheets of metal base material suitable for manufacture into radio frequency identification antennas; employing a laser pulse with sufficient fluence to ablate a metal base sheet with a pulse of sharply focused femtosecond laser ablation energy to create three dimensional nano structures on the metal base material to increase the radiation sensitivity of the base metal sheet material; performing reflectance measurements of the metal base material, subsequent to the laser ablation process, through the use of ellipsometry and integrating sphere as well as Energy Dispersive X rays, X ray Photoelectron Spectroscopy and Augur Emission Spectroscopy techniques to analyze the surface properties of the metal base material to determine the parameters of the reflectance values of the laser machined metal base material for the purpose of verifying the presence of sufficient three dimensional nano structures to adequately increase the sensitivity of the antenna metal base material.