A dual band transponder comprises a carrier substrate having at least one planar substrate layer. An ultra-high frequency loop antenna is mounted on a first surface of one of the planar substrate layers of the carrier substrate. A high frequency loop antenna is mounted on two opposite surfaces of one of the planar substrate layers of the carrier substrate. The ultra-high frequency loop antenna encloses the high frequency loop antenna in a plane parallel to the at least one planar substrate layer entirely. A textile label includes a textile label substrate and a corresponding dual band transponder mounted onto the textile label substrate.

A device for measuring a physical quantity, including at least a transceiver unit for electromagnetic waves, an antenna-sensor including a sensor integrated into a target antenna having at least one excitation port, the antenna-sensor having a variable impedance with electromagnetic transduction, the measuring device being configured, per predetermined frequency band and independently of the angular difference between the transmission and reception of waves, for measuring the electromagnetic response of the antenna-sensor at least from an ellipticity rate of an electromagnetic field backscattered by the antenna-sensor, the ellipticity rate characterizing the polarization of the electromagnetic field configured to be measured by the transceiver unit, the electromagnetic response being representative, by electromagnetic transduction, of the at least one physical quantity to be measured.

An integrated radio frequency identification tag and tire pressure monitoring system sensor includes a radio frequency identification tag. The radio frequency identification tag includes an integrated circuit, and a printed circuit board carries the integrated circuit. A tire pressure monitoring system sensor is mounted on the radio frequency identification tag. An antenna includes at least one coil antenna wire. The antenna wire is formed in a helical shape and is electrically connected to the integrated circuit. A first end of the antenna wire is mounted to the printed circuit board. A mechanical interlock between the first end of the antenna wire and the printed circuit board includes features that secure the first end of the antenna wire to the printed circuit board.

An RFID includes a first conductive layer; a second conductive layer in which an antenna is formed; an insulating layer; and an IC chip. The antenna includes a first slot; a second slot facing the first slot; a coupling slot to couple the first slot with the second slot; a first adjustment slot coupled with one end of the first slot, and being wider than the first slot; a second adjustment slot coupled with another end of the first slot, and being wider than the first slot; a third adjustment slot coupled with one end of the second slot, and being wider than the second slot; a fourth adjustment slot coupled with another end of the second slot, and being wider than the second slot.

Example embodiments relate to radio-frequency identification (RFID) tags for liquid monitoring. An example RFID tag includes an antenna configured to communicate with an RFID reader. The antenna includes a radiating plane. The antenna also includes a ground plane. The RFID tag is attachable to a container. A reactance associated with the antenna is modifiable based on a temperature and a volume of a liquid within the container and adjacent to the ground plane. The RFID tag also includes an integrated circuit that includes a memory. The integrated circuit is configured to modulate the antenna in response to an RFID signal from the RFID reader based on the reactance associated with the antenna.

A RFID tag for placement on a surface of a container that contains a liquid is provided. The RFID tag includes an IC chip configured to store identification information, a loop conductor connected to the IC chip, and an antenna unit that includes two conductor units connected to the loop conductor and extending away from each other from the loop conductor.

An RFID tag is provided that includes an RFIC module with a base substrate and an RFIC chip, and an antenna element. A principal surface of the base substrate is provided with a first chip connection terminal connected to a first input/output terminal of the RFIC chip, a second chip connection terminal connected to a second input/output terminal, a first module-side terminal connected by direct current or capacitively coupled to a first antenna-side terminal of the antenna element, a second module-side terminal connected by direct current or capacitively coupled to a second antenna-side terminal, a first wiring pattern connecting the first chip connection terminal and the first module-side terminal, a second wiring pattern connecting the second chip connection terminal and the second module-side terminal, and a third wiring pattern connecting the first module-side terminal and the second module-side terminal.

Systems and methods for operating a tag system. The methods comprising: emitting a wireless signal from an antenna of the tag with a first signal characteristic when the tag is proximate to an active antenna modulation marker; changing an impedance of a sensor from a first impedance value to a second impedance value when the active antenna modulation marker is exposed to a stimulus; and emitting a wireless signal from the antenna of the tag with a second signal characteristic when the tag is proximate to the active antenna modulation marker and the sensor has the second impedance value.

An assembly and method of manufacture of a radio frequency identification (RFID) assembly having a passive RFID semiconductor chip and a two sided planar antenna and a spacer composed of an electrically non-conducting foam material that is configured for non-absorbing of a substantial amount of energy at the predetermined operating frequency, the spacer having a predetermined thickness and that is configured for non-absorbing of a substantial amount of radio frequency energy at the predetermined operating frequency wherein the RFID tag assembly is configured to receive at a first side of the two sided planar antenna a first portion of the radio frequency energy as direct energy and is configured to receive at a second side of the planar antenna a second portion of the radio frequency energy as indirect energy responsive to the absorbing by the absorbing material body.

An RFID system includes an RFID antenna assembly configured to be positioned on a product module assembly of a processing system. The product module assembly is configured to releasably engage at least one product container. A first RFID tag assembly configured to be positioned on the at least one product container. The at least one product container is configured to position the first RFID tag assembly within a detection zone of the RFID antenna assembly whenever the product module assembly releasably engages the at least one product container.