Abstract:
The present invention relates to a method of manufacturing an antenna for a radio frequency (RFID) tag. A web of material is provided to at least one cutting station in which a first pattern is generated in the web of material. A further cutting may occur to create additional modifications in order to provide a microchip attachment location and to selectively tune an antenna for a particular end use application. The cutting may be performed by a laser, die cutting, stamping or combinations thereof.
Abstract:
The present invention relates to an advertising system (50) and method of using the same. The advertising system includes a light source (54) which may be activated by near field communication devices in order to extract information from the system.
Abstract:
A system for monitoring compliance with a medication regimen comprises a patch. The patch includes an RFID apparatus and a sensor. The patch is configured to be removably securable to a body of a biological organism. The sensor is in electrical communication with the RFID apparatus and is configured to inspect a biological material of a biological organism for the presence of a detectable agent. The RFID apparatus is configured to communicate a result of the inspection to an RFID transceiver and/or a communication device. Methods are also provided.
Abstract:
A radio frequency identification (RFID) device (10) includes a conductive loop shield (26) for a loop antenna (12). The shield may overlap the conductive loop antenna. The preferred frequency of operation may be a frequency or rang of frequencies within the ultra high frequency (UHF) range of frequencies. The conductive loop shield provides a distributed capacitance to the loop antenna which brings the inductance of the combined system of the loop antenna and th conductive shield down to an inductance level that allows impedance matching with the RFID chip (at the desired impedance or range of impedances). The use of the conductive loop allows the RFID device to function as a near-field magnetic communication device, utilizing a loop antenna having a larger area than would normally be possible for impedance matching with RFID chip. The loop antenna and the conductive shield loop may be on opposed major surfaces of a dielectric material layer (24).
Abstract:
Readability of overlapping radio frequency identification (RFID) devices on overlapping objects, such as RFID labels on stacked garments, is improved by having different antenna configurations for the overlapped RFID devices. Each pair of closest overlapped RFID devices may have different respective antenna configurations. The different respective antenna configurations may be mirror images of one another, or may have the same shape, with a relative rotation between the two. The different antenna configurations may substantially fill an antenna-receiving portion that is located in the same relative location in each of the RFID devices, with the antenna-receiving portion covering most of an area of the RFID devices. Feedpoints of the different antenna configurations, for receiving a strap or interposer for coupling to the antenna configurations, may be in the same relative location.
Abstract:
A hybrid sensor/communication device includes a radio frequency identification (RFID) communication device coupled to a sensor device that includes organic and/or amorphous semiconductor material. The organic and/or amorphous semiconductor material may be printed atop a substrate of the device, the same substrate upon which antenna elements of the RFID device are located. The organic and/or amorphous semiconductor material may form an organic/amorphous semiconductor material processor that is coupled to sensor pads of the sensor device. An integrated circuit of the RFID device, which may be a part of an interposer or strap, and which may utilize an inorganic crystalline semiconductor material such as crystalline silicon, is coupled to the organic/amorphous semiconductor material processor. The RFID device provides power to the sensor device, and allows communication between the sensor device and external devices outside of the hybrid sensor/communication device.
Abstract:
An RFID device (10), such as an RFID tag or label, includes a magnetic coupler (12) between an interposer or strap (16), and an antenna (20). The interposer or strap includes a transponder chip (26), and an interposer magnetic coupling element (28) that is operatively coupled to the transponder. An antenna portion magnetic coupling element (22) is operatively coupled to the antenna. The magnetic coupling elements together constitute a magnetic coupler that is used to magnetically couple the transponder chip of the interposer to the RFID antenna. A high permeability material (30) may be used to enhance the magnetic coupling between the magnetic coupling elements. The magnetic coupling elements single-turn conductive loops or multiple-turn coils. The magnetic coupler may function as a transformer, with the voltage across the antenna transformed to a different voltage across the transponder chip, and vice versa.
Abstract:
A method of coupling an RFID chip to an antenna includes the steps of, iteratively until a test criterion is met, positioning an RFID chip relative to an antenna and testing the RFID chip and antenna. Once the test criterion is met, the RFID chip is coupled with the antenna. A method of coupling an RFID chip to one of a plurality of various antennas is also provided. A method of coupling an RFID chip to an antenna on an object is also provided.
Abstract:
A web of radio frequency identification (RFID) devices includes a conductive layer atop an insulating layer, the conductive layer having one or more apertures therein. Alternatively, the web may not include an insulating layer. RFID chips or straps are electrically coupled to portions of the conductive layer on either side of an aperture, for use as antennas when the RFID devices are separated from one another, as by cutting. The apertures may be formed by creasing portions of the web, and removing parts of the creased portion. There may be one or more apertures in a longitudinal or transverse direction of the web. The antenna shapes of various of the RFID devices may be tessellated, nesting within one another or having the same boundary, thereby improving efficiency by using substantially all of the conductive material. The RFID devices may be tested and/or programmed while remaining in the web format.
Abstract:
A radio frequency identification (RFID) system includes an RFID device, and a conductive material that cooperates with the RFID device to enhance performance of the RFID device. The RFID device and the conductive material may be within a distance of about one-quarter of a wavelength of energy most preferentially received by the RFID device. The RFID device may be mounted at an angle to the conductive material. Alternatively, or in addition, the RFID device may be partially overlapped by the conductive material. The RFID device may include a conductive antenna structure having an aperture therein.