A planar conductor device and RFID chip are folded to create a coil to form an RFID tag. The result is the formation of a solenoid coil, not planar, which allows the device to be placed against metal. Specifically, the planar structure is folded into a concertina fold. After folding, a spiral conductor is formed in the Z direction, forming a coil with the RFID chip connected to both ends. This structure operates as a resonant RFID tag.

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.

Ingestible radio frequency identification (RFID) tags are disclosed. A system embodiment includes, but is not limited to, an RFID tag including a flexible substrate foldable between a planar configuration and a tubular configuration, a conductive element disposed on the flexible substrate, and an RFID tag chip electrically coupled with the conductive element; a capsule structured and dimensioned for ingestion by a biological subject, the capsule including a shell structured and dimensioned to enclose a medication for the biological subject simultaneously with the RFID tag when the flexible substrate is in the tubular configuration, but not when the flexible substrate is in the planar configuration; and a pH switch structure coupled to an exterior surface of the capsule, the pH switch configured to deactivate the RFID tag in a first configuration and to permit activation of the RFID tag in a second configuration within the biological subject.

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.

A combined EAS and RFID circuit includes an HF coil antenna, a UHF tuning loop, and an RFID chip coupled to a strap that includes a first coupling area and a second coupling area. The coil ends of the HF coil antenna are configured to capacitively and/or conductively couple to one or both of the first coupling area or second coupling area of the strap. The HF coil antenna can include a gap between turns for non-interfering placement of the UHF tuning loop. The EAS circuit can be deactivating upon application of a field at the resonant frequency of sufficient intensity to cause the breakdown voltage to be exceeded between a coil end and coupling area. The threshold breakdown voltage between a coil end and a coupling area can be reduced by laser ablation treatment of a conductive surface of one or both of the coil end or coupling area.

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 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 RFID signal repeater system includes a RFID repeater circuit and a housing body. The repeater circuit has a first RFID antenna and a second RFID antenna being connected by an electrical path. A RFID signal captured at one of the antennas is repeated at the other antenna. The housing body includes a first housing portion housing the first antenna and supporting a RFID reader device, whereby the RFID device is in RFID communication with the first antenna when supported by the first housing portion. The body also includes a second housing portion mechanically connected to the first housing portion and configured to support the second antenna and a programmable RFID device, whereby the programmable RFID device is in RFID communication with the second antenna when supported by the second housing portion. The housing body can have various form factors. A power repeater enabling wireless charging can also be provided.

A container is provided that includes an RFID module, and further includes an insulating base material that forms an outer shape of the container; a metal film formed on a first main surface of the insulating base material; and a slit formed in the metal film. Moreover, the RFID module includes an RFIC element, a filter circuit that transmits a current caused by an electromagnetic wave at a unique resonance frequency serving as a communication frequency to the RFIC element, and first and second electrodes connected to the filter circuit. The metal film is formed to wrap around an outer periphery of the container in a direction intersecting the slit, and the first and second electrodes of the RFID module are electrically connected to the metal film across the slit formed between the first electrode and the second electrode.

A radio-frequency identification (RFID) tag for semi-permanent insertion into a gap in a storage grid includes an RFID antenna; a storage medium configured to store identification data, the storage medium being connected to the RFID antenna; and a case configured to house the RFID antenna and the storage medium. The case includes: an internal surface configured to support one or both of the RFID antenna and the storage medium; one or more feet configured to limit insertion of the case into the gap in the storage grid; and one or more protrusions configured to provide resistance to case movement relative the gap.