The present invention relates to a transponder tag (10) that is operable by a mobile telephone, a mobile telephone for operating such a transponder tag (10), a method of operating the transponder tag (10), and a method for detecting the presence of a portable object. The transponder tag comprises a receiving unit (20) for receiving a wireless input signal. The transponder tag (10) is configured to obtain energy (EG) from the received input signal and to use the energy (EG) obtained from the input signal for transmitting by way of a wireless short-range connection a wireless output signal (SSR) that corresponds to a tag information (ITG) of the transponder tag (10). The receiving unit (20) is configured to receive a wireless input signal (STUP) at a frequency of at least one uplink band of a mobile telephone network. In this way, radiation energy of the mobile phone is used to achieve an energy-efficient and reliable operation of the transponder tag as long as the latter is located within a short distance of the mobile phone. This is useful for numerous applications. For example a person may use his/her mobile telephone to obtain a quick overview and/or a reliable confirmation that all his/her personnel belongings, e.g. keys or medical box, are “on board” at the moment the person leaves home.

An RFID tag board includes an insulating substrate provided with a first surface conductor, a second surface conductor, a short-circuit part through conductor, a capacitance conductor, a capacitance part through conductor, a first electrode and a second electrode. The short-circuit part through conductor electrically connects the first surface conductor and the second surface conductor. The capacitance conductor faces at least part of one of the first and second surface conductors to form a capacitance element. The capacitance part through conductor electrically connects the capacitance conductor and the other one of the first and second surface conductors. First and second conductors of the capacitance element are electrically connected to the first and second electrodes, respectively, not via the short-circuit part through conductor. A distance from the first electrode to the short-circuit part through conductor is shorter than a distance from the second electrode to the short-circuit part through conductor.

A method for manufacturing an antenna for an RFID device includes providing a conductive material on a substrate and performing a first cutting process on the conductive material to define an initial antenna. Additional cutting processes are performed on the initial antenna to define a final antenna, with the first and any subsequent cutting processes being different. The subsequent cutting processes are capable of more finely defining regions of the antenna, such as in some embodiments when the first cutting process is a die cutting process and a second cutting process is a laser cutting process. While the subsequent cutting processes are capable of more finely defining regions of the antenna than the first cutting process. By combining multiple cutting processes, a final antenna equivalent to one made using only one or more of the subsequent cutting processes may be created at a lower cost.

Systems and methods for integrating tags with items. The methods comprise: dynamically determining a length of each metal thread to be incorporated into or trace to be disposed on a item to optimize tag performance in view of dielectric and tuning properties of the item. In the metal thread scenarios, the methods also involve: creating a metal thread having the length that was dynamically determined; and sewing the metal thread into the item being produced to form an antenna for a first tag. In the trace scenarios, the methods also involve forming the trace on the item being produced to form an antenna for a first tag. Next, at least a communications enabled device is attached to the item so as to form an electrical coupling or connection between the communications enabled device and the at least one antenna.

Wireless sensing units, methods, systems, and processor-readable media for obtaining pressure data relating to one or more pressure locations of a surface area are described. A wireless sensing system includes a pressure monitoring device communicating with modular wireless smart floor tiles using RFID, either using an RFID reader or wireless network interface (e.g., 802.11). The tiles incorporate passive or active RFID tags. The tiles can be powered wirelessly, e.g. by a built-in piezoelectric power unit or by a wireless power source using magnetic resonance. A data capture circuit in each tile collects and saves the data for transmission to the floor pressure monitoring device. Various software applications can be enabled by the smart floor system, including fall detection and prediction, gesture input, intrusion detection, and user location tracking for smart home automation.

Described examples relate to a radio frequency identification (RFID) device configured to be detachably coupled to an object. The RFID device may include a first RFID tag comprising a first antenna, the first antenna comprising a first arcuate element and a second arcuate element, wherein the first accurate element and second arcuate element are arranged in a semicircle. The RFID device may also include a second RFID tag comprising a second antenna.

The present invention relates to a document comprising at least one RFID transponder, the RFID transponder comprising an antenna (3, 23) and an integrated circuit (4, 24) electrically coupled to the antenna (3, 23). The document comprises at least one detachable detuning element (7, 27) electrically coupled to the antenna (3, 23). The in-vention also relates to a method for manufacturing a document comprising an RFID transponder.

A RFID tag that includes a first RF chip, a second RF chip, a first wiring and a second wiring is provided. The first RF chip and the second RF chip are adjacent and connected to each other, and each of the first RF chip and the second RF chip has two pads. Said two pads of the first RF chip and said two pads of the second RF chip are connected to two complementary antennas. The first wiring conducts said two pads of the first RF chip to one of said two complementary antennas. The second wiring conducts said two pads of the second RF chip to the other of said two complementary antennas.

Aspects of the present disclosure relate to methods and systems for laser turning and attaching RFID tags to products. Such methods and systems may include a memory and a processor coupled to the memory. The methods and systems may include determining a characteristic of a conductive trace on a substrate to be incorporated into an item to configure a tag performance in view of at least one of a dielectric property or a tuning property of the item. The methods and systems may further include a laser to alter the conductive trace on the substrate to have the characteristic to define an antenna for the tag. The methods and systems may further include an attaching device configured to attach a communications enabled device to the substrate so as to form an electrical connection between the communications enabled device and the antenna to form the tag.

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.