Abstract:
A Radio Frequency Identification (RFID) device can comprise a dielectric separator and a RFID antenna with a RFID chip region. The antenna can have a main section and at least two tuning stubs that fold back from areas on the main section of the RFID antenna which are away from the RFID chip connection region back towards the RFID chip antenna region. The tuning stubs can be spaced away from the main section.
Abstract:
A RFID-based identification device comprising a first RFID antenna; and a second RFID antenna, wherein the first and second RFID antennas are in a first arrangement, the resonant frequencies of the antennas are away from an interrogation frequency such that no identification information is transferred, and wherein when the first and second RFID antennas are in a second arrangement, the resonant frequency of the identification device shifts such that identification information is transferred.
Abstract:
A tool tray can comprise a body with tool shaped recesses. A Radio Frequency Identification (RFID) tag can be positioned in one of the recesses. The RFID tag can be such that when no tool is placed in the one of the recesses, the tag is not detectable at a reading distance; but, when a corresponding tool is placed into the one of the recesses, the RFID tag is detectable from a reading distance.
Abstract:
A RFID-based identification device comprising a first RFID antenna; and a second RFID antenna, wherein the first and second RFID antennas are in a first arrangement, the resonant frequencies of the antennas are away from an interrogation frequency such that no identification information is transferred, and wherein when the first and second RFID antennas are in a second arrangement, the resonant frequency of the identification device shifts such that identification information is transferred.
Abstract:
A method of constructing an RFID unit can include using a protective layer to hold an integrated circuit chip module to a substrate layer with an antenna unit while a conductive adhesive has not yet fully set.
Abstract:
An RFID device can comprise a flexible substrate and an RFID tag formed on the flexible substrate. The flexible substrate can be folded over to encapsulate and protect the RFID tag.
Abstract:
A sensor can detect the presence of fluid by the changing of the response characteristics of an RLC circuit. A window in the sensor is used to position a short caused by the fluid.
Abstract:
An RFID keyboard comprising a base with a first antenna and; keys with secondary antennas wherein a key is normally in a first position such that the resonant frequency is away from an interrogation frequency and no signal for the key is detected and wherein when the key is depressed, the secondary antenna for the key and the first antenna become adjacent such that the resonant frequency shifts such that information identifying the key is transferred.
Abstract:
A Radio Frequency Identification (RFID)-based identification device can comprise first and second RFID antennas. When first and second RFID antennas are in a first arrangement, the resonant frequencies of the antennas can be away from an interrogation frequency such that no identification information is transferred. When the first and second RFID antennas are in a second arrangement, the resonant frequency of the identification device shifts such that identification information, including biometric data, is transferred.
Abstract:
An RFID antenna can include a shunt across a connector region of a length in a range of 1/6 to 1/3 of the operating wavelength of the RFID antenna. This can improve the operating characteristics of the RFID antenna.