A method and structure for a radio frequency identification (RFID) system including an RFID tag. The RFID tag can include a dampener configured to dampen a resonation of a resonator. Prior to dampening the resonation of the resonator using the dampener, the RFID tag may be configured to transmit a first response signal from a transmit antenna. Subsequent to dampening of the resonation of the resonator using the dampener, the RFID tag may be configured to transmit a second response signal that is different from the first response signal. The dampener may include a chemical agent or a fusible link.

Embodiments of the invention include delay line circuitry that is integrated with an organic substrate. Organic dielectric material and a plurality of conductive layers form the organic substrate. The delay line circuitry includes a piezoelectric transducer to receive a guided electromagnetic wave signal and to generate an acoustic wave signal to be transmitted with an acoustic transmission medium. An acoustic reflector is communicatively coupled to the acoustic transmission medium. The acoustic reflector receives a plurality of acoustic wave signals from the acoustic transmission medium and reflects acoustic wave signals to the piezoelectric transducer using the acoustic transmission medium. The transducer converts the reflected acoustic signals into electromagnetic waves which are then transmitted back through the antenna and decoded by the reader.

An article, system and method related to a magnetomechanical marker used to mark stationary assets. Magnetomechanical markers can be arranged in clusters and associated with stationary assets, including assets buried underground. Markers can be associated with an asset by being attached to the asset, arranged in a particular spatial relationship with the asset, or in any other appropriate way. A portable locating device can be used to generate an alternating magnetic field to activate the magnetomechanical marker and thus locate the asset.

A chipless RFID transponder is disclosed. The transponder comprises an antenna and a plurality of resonant structures that together define a spectral signature of the RFID transponder. Each of the resonant structures comprises conductive portions separated by interstitial regions. A photo-polymerizable filler is disposed in the interstitial regions of the resonant structures between the conductive portions. The photo-polymerizable filler is positioned so as to shift the spectral signature of the RFID when exposed to radiation.

A mm-wave RFID tag interrogation apparatus includes multiple transmitting antennas, and multiple receiving antennas. The transmitting and receiving antennas are spatially distributed and oriented in orthogonal polarisation states. A transmitter is coupled to the transmitting antennas, and transmits a corresponding multiple number of separable mm-wave signals. A receiver coupled to the receiving antennas is configured to extract separable components of received mm-wave signals. A processing unit processes the extracted signal components using a synthetic aperture algorithm. An RFID tag, readable by the interrogation apparatus, includes meander-line conductive elements arranged to encode information spatially on a substrate.

One embodiment is a flat card that includes an electrically non-conductive substrate and a plurality of electrical conductors disposed on a surface of the non-conductive substrate. The conductors are connected together to form patterns of conductive lines connected to conductive geometric shapes located at ends of the conductive lines. A switch is positioned between two of the conductive geometric shapes and switchable between an open state and a closed state.

According to embodiments of the present invention, a device releasably couplable to an electric asset is provided. The device includes a sensor configured to detect partial discharge from the electric asset and generate a pulsed signal representative of a presence or absence of the detected partial discharge; and a time-domain based RFID tag electrically coupled to the sensor. The time domain-based RFID tag is configured to provide an ID code uniquely representative of a location of the device when coupled to the electric asset. The device is configured to generate, upon interrogation by an external interrogator, a backscattered signal including the ID code and the pulsed signal. The generated backscattered signal is to be read by an external reader. According to further embodiments, a method for obtaining identification of at least one electric asset and information on partial discharge experienced by the at least one electric asset is also provided.

Methods, systems, and apparatus, including computer programs encoded on a storage medium, for integrating components into objects that are to be 3D printed. One of the methods includes obtaining a three-dimensional model of a first object; receiving an input identifying an additional component; generating a digital representation of the additional component; integrating the digital representation of the additional component with the three-dimensional model; and providing the three-dimensional model with the integrated digital representation to a 3D printer for fabrication.

Inductive identification systems and methods are described. The system may include an inductive detector configured to identify objects having inductive identifiers. An inductive detector may include conductive coils and inductance readout circuitry for measuring an inductance of each coil. An inductive identifier may include a conductive pattern configured to induce a desired inductance in the coils of the inductive detector. An inductive identifier may include a film having openings, each opening configured to be disposed over a corresponding coil to induce differing inductance changes in the corresponding coils. A pattern of inductance values may be determined and used to identify the object. The detector may be implemented in a cassette recess of an infusion pump system. The inductive identifier may be disposed on a pump cassette configured to be received in the cassette recess and identified based on an inductive interaction between the inductive detector coils and the inductive identifier.

Chipless RFID tags and a tag system are provided, wherein the stepped impedance higher-order mode resonator includes two sets of composite transmission lines each set having an equal line length and including a plurality of transmission lines each having a plurality of specific levels to which the transmission line characteristic impedance is assigned, the two sets of composite transmission lines each connected in series, the sets being connected at the center to form an electrically symmetrical configuration and wherein the chipless RFID tags and the tag system allow each of the codes to be assigned to each of the structures of the stepped impedance higher-order mode resonator, and allow each of those codes to be identified by detecting each of the combinations of the higher-order mode resonance frequencies that may be produced from each the structures of the resonator that corresponds to each of the codes that have been assigned.