A radio-frequency identification device for identifying a tubular element is provided that includes a radio-frequency identification chip connected to at least one antenna having two conductive strands and a flexible envelope enveloping the radio-frequency identification chip and strands. The envelope is a silicone material and includes a central portion overmolding the radio-frequency identification chip, and two strips extend on either side of the central portion and each strip overmolds at least one strand. Each of the two strips has a free end with a pierced boss capable of cooperating with a hose clamp. The two strips are thermoformed in a twisted configuration around a common twisting axis.

In a wireless IC device, a columnar body includes a metal body with an insulating film. A loop-shaped antenna conductor is provided on an upper surface of the columnar body via an insulating pedestal. The loop surface of the antenna conductor is parallel or substantially parallel to the upper surface of the columnar body. On the lower surface of a RFIC element, two terminal electrodes are provided. The RFIC element is mounted on the antenna conductor such that the two terminal electrodes are connected to both ends of the antenna conductor, respectively. One end of the connecting conductor is connected to the vicinity of one end of the antenna conductor, and the other end of the connecting conductor is connected to the upper surface of the columnar body.

In an aspect, the present invention provides a document having a first page and a second page connected by a hinge portion. In illustrative embodiments, the document comprises an RF chip module, a first antenna portion formed on the first page, a second antenna portion formed on the second page, and at least one foldable bridge formed on the hinge portion, wherein the at least one foldable bridge electrically connects endings of the first and second antenna portions such that the first and second antenna portions have a first inductance adapted to provide the document with a first resonance frequency in a closed condition of the document in which the first page is placed on the second page, while the first and second antenna portions have a second inductance adapted to provide the document with a second resonance frequency different from the first resonance frequency in an open condition of the document in which the first page is removed from closed condition.

An RFID tag includes: a base portion in a plate shape made of dielectric material; a loop antenna formed by etching and including a first antenna element and a second antenna element disposed in a loop shape along an outer periphery of the base portion; and an IC chip inserted to the loop antenna in series and including a first electrode and a second electrode.

An RF tag that includes an inlay (made of an IC chip and an antenna); an auxiliary antenna laminated on the inlay in an insulated state; and a housing that houses the inlay having the auxiliary antenna laminated thereon. Furthermore, the antenna of the inlay forms a loop circuit adjacent to the IC chip, and the auxiliary antenna overlaps part of the loop circuit and is arranged along a longitudinal direction of the inlay such that at least a part of the antenna of the inlay is exposed.

A method for producing a radio frequency transmitting/receiving element comprising at least one radio frequency antenna and at least one radio frequency chip, and to a corresponding radio frequency transmitting/receiving element made by the method. The method comprises the following steps: providing a temporary rigid carrier; applying a conductor pattern structure comprising the antenna structure of the at least one radio frequency antenna and connection contactsconnected thereto via leadsfor the at least one radio frequency chip; arranging the at least one radio frequency chip on the connection contacts of the conductor pattern structure; applying an electrically insulating layer on the conductor pattern structure, such that the at least one radio frequency chip is surrounded by the electrically insulating layer; and removing the temporary rigid carrier.

A patch radiofrequency identification (RFID) device for tires comprises: a substrate; a first insulating layer covering part of the substrate; an RFID chip and first antenna connected to each other and arranged on the first insulating layer; a second antenna electromagnetically coupled with the first antenna and extending, at least partially, on the first insulating layer. Part of the second antenna extends around the first antenna and includes two ends located at opposite sides thereof, and another part includes one or more arms extending in opposite directions from the first antenna, the arms being respectively formed by meander-line-shaped and/or spiral-line-shaped wire. The RFID chip, the first antenna, and the second antenna lie on a same plane. The second antenna is a parasitic radiator. A second insulating layer covers the first insulating layer, the RFID chip, the first antenna and, at least partially, the second antenna.

A product such as a tire includes a radio frequency identification device (RFID) assembly located along an outer sidewall. The RFID assembly has a thin, flexible, substantially planar, elongated non-conductive rubber, elastomer, or polymer substrate. First and second thin, flexible, elongated, substantially planar first antenna portions formed at least in part of the same conductive rubber, elastomer, or polymer are provided on the substrate. Opposite first and second ends of the first antenna portion have different first and second widths. A chip has opposite first and second ends in operative electrical connection with the first and second antenna portions, respectively, and is located between the outer sidewall and the substrate.

A radio frequency identification (RFID) tag, includes: a substrate; an antenna formed on a first surface of the substrate; an IC chip electrically coupled to the antenna; an adhesive applied to a first area of the substrate to fix the IC chip and the antenna to each other, and a first laminate layer formed on a second surface of the substrate opposite to the first surface thereof, wherein at least a part of the first laminate layer is missing within a second area, which corresponds to the first area, on the second surface.

A product such as a tire includes a radio frequency identification device (RFID) assembly located along an outer sidewalk The RFID assembly has a thin, flexible, substantially planar, elongated non-conductive rubber, elastomer, or polymer substrate. First and second thin, flexible, elongated, substantially planar first antenna portions formed at least in part of the same conductive rubber, elastomer, or polymer are provided on the substrate. Opposite first and second ends of the first antenna portion have different first and second widths. A chip has opposite first and second ends in operative electrical connection with the first and second antenna portions, respectively, and is located between the outer sidewall and the substrate.