Inksure Rf Inc.

Kromotek, Ltd.

Yaron Meerfeld

Shlomo Dukler

Semion Kofman

Maya Sandler

Victor Alchanatis

Jacob Hassan

A system and method for reading an RFID data tag comprising a plurality of diffractive elements being indicative of machine-readable data carried by the tag are provided. The diffractive elements have such shape that the dimension of the diffractive elements along one axis is substantially different than the dimension of the elements along the perpendicular axis. Each diffractive element is oriented in a direction other than the direction of its neighboring elements. The system comprises a transmitting antenna configured for emitting an RF radiation signal at a predetermined polarization towards the tag; and a receiving antenna configured for collecting re-radiated RF radiation produced by the tag in response to the RF radiation signal at a polarization orthogonal to the polarization of the transmitting antenna and generating electromagnetic signals indicative of the data carried by the tag. The system also includes an interrogator unit configured for generating the transmitted RF radiation signal and processing the electromagnetic signals produced by the receiving antenna for determining the data carried by the tag.

Radio frequency identification system and data reading method

A radio frequency identification data tag, a system and a method for reading the tag are described. The tag comprises a plurality of diffractive elements which are indicative of data carried by the tag. The diffractive elements have such shape that the dimension of the diffractive elements along one axis is substantially different than the dimension of the elements along the perpendicular axis. The diffractive elements are arranged in columns and rows in accordance with a predetermined layout scheme. In each column, the diffractive element is oriented in a direction other than the direction of the elements in the neighboring columns. The system for reading the tag comprises an array of transmitting (Tx) antennas for emitting an RF transmitted radiation signal at a predetermined polarization towards the tag, and an array of receiving (Rx) antennas configured for collecting re-radiated RF radiation produced by the tag at a polarization orthogonal to the polarization of the transmitting antenna. The system also includes an interrogator unit configured for generating the RF transmitted signal, and processing the RF received signal for reading the data carried tag. The reading is carried out by using amplitude information of SAR images based on the received signal for determining the arrangement of symbol elements in columns and phase information of the SAR images for determining the arrangement of the symbol elements in rows.

Method and apparatus for identification of radio frequency tag

A method of marking an article to enable its identification, by applying to the article a conductive path, which is at least partially coated with a dye layer of at least one compound selected from voltage sensitive fluorescent dye (VSFD), mixture of such dyes, electro luminescent (EL) compound, OLED compound or mixtures thereof, the dye layer being excitable to emit fluorescent radiation, which serves to identify the article.

Chipless RF tags

Photographic process, in which a substrate comprising a plurality of superimposed layers of photochromic materials sensitive to different light wavelengths is provided. The object to be photographed is scanned and a digital file defining the image of the object is generated from the scanning. A plurality of sources of laser light having different wavelengths, each of which is the wavelength to which one of the photochromic materials is sensitive is provided and the layers of photochromic materials are irradiated by means of the laser beams produced by the sources, according to a program determined by the digital file, whereby to develop in each pixel of the substrate the color that it has in the image. The colors thus generated in the pixels of the substrate layers; and the background areas of the substrate layers are set.

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Ramat Gan, Israel

Yaron Meerfeld