A card-type electronic device capable of suppressing a rise in the temperature of signal lines for high-speed communication requiring impedance control while ensuring sufficient thermal connection and electrical connection. A connector is fixed to a substrate on which electronic components that generate heat are mounted, and includes electrical contacts electrically connected to an external apparatus and a thermal contact thermally connected to the external apparatus. A cutout is formed in the substrate between a portion to which the thermal contact is fixed and a portion to which the electrical contacts are fixed.

An RFID tag is provided as a wireless communication device for transmitting and receiving a communication signal. The RFID tag includes a base material, antenna patterns formed on the base material, and an RFIC package that is a feeder circuit connected to the antenna patterns. In the antenna patterns, a line width at a harmonic current concentration portion where a current is strong at a frequency of harmonic resonance higher than a resonance frequency at a frequency of the communication signal is narrower than a line width at another portion of the antenna pattern.

A radio frequency identification (RFID) system. An RFID tag may include multiple antennas connected with associated circuitry. An RFID tag's multiple antennas and associated circuitry are connected in parallel, and output power of the multiple associated circuitry can be combined. Each of the multiple antennas can be tuned for a different operating property or region. An RFID reader can include multiple antennas connected with associated circuitry. RFID reader's multiple antenna interfaces connect with a baseband processor, which can integrate resources of the reader's multiple antennas and associated circuitry. RFID tag and/or reader can be configured to support wireless channel diversity in enhancing at least one of power delivery and communication link budget.

RFID plugs and methods of installing the same within a rubber article. When included in the rubber article, the RFID plugs maintain operability pre-vulcanization, during vulcanization, and post-vulcanization to identify, track, and/or sense conditions of the rubber article. The RFID plugs are adapted to be affixed to the rubber article and include, for example, an elongate stem; a head disposed at a first end of the stem, the head containing an RFID device; and a retention feature disposed at a second end of the stem opposite the first end, the retention feature configured to resist pulling forces on the head and the stem.

This disclosure describes RFID tags configured to fracture when heated, such as when exposed to threshold levels of electromagnetic energy. In some instances, the RFID tags include materials that expand when heated for the purpose of stressing metal antenna traces of the RFID tags. When under stress from these expansion materials that bond to the antennas (e.g., thermoplastics), these antennas may fracture, thus lessening the risk that the dangerous arcing will occur from the electromagnetic energy, such as when an item and corresponding tag are placed in a microwave oven.

A card-type electronic device capable of suppressing a rise in the temperature of signal lines for high-speed communication requiring impedance control while ensuring sufficient thermal connection and electrical connection. A connector is fixed to a substrate on which electronic components that generate heat are mounted, and includes electrical contacts electrically connected to an external apparatus and a thermal contact thermally connected to the external apparatus. A cutout is formed in the substrate between a portion to which the thermal contact is fixed and a portion to which the electrical contacts are fixed.

A radio frequency identification (RFID) system. An RFID tag may include multiple antennas connected with associated circuitry. An RFID tag's multiple antennas and associated circuitry are connected in parallel, and output power of the multiple associated circuitry can be combined. Each of the multiple antennas can be tuned for a different operating property or region. An RFID reader can include multiple antennas connected with associated circuitry. RFID reader's multiple antenna interfaces connect with a baseband processor, which can integrate resources of the reader's multiple antennas and associated circuitry. RFID tag and/or reader can be configured to support wireless channel diversity in enhancing at least one of power delivery and communication link budget.

A method of manufacturing a smartcard may include providing a flexible smartcard circuit, forming conductive extension members on and extend away from the flexible circuit from a high melting point solder material, and laminating the flexible circuit to form a smartcard body. A cavity is then milled in the smartcard body to expose the ends of the extension members, and a contact pad is inserted into the cavity and electrically connected to extension members using a low melting temperature tin-bismuth solder using ultrasonically soldering, so as to avoid heat damage to the card body.

High temperature radio frequency identification (RFID) tags are formed from nesting insulative ceramic structures with a woven cladding provided around an RFID tag. Additional interstitial woven cladding may be positioned between the ceramic structures. The layered approach provides sufficient insulation that allows sustained operation at temperatures above 500-600 degrees centigrade (500-600 C.) while being sufficiently transparent to radio frequency (RF) signals to allow interrogation and response for track and trace purposes even at such elevated temperatures.

A temperature-sensing RFID device includes an RFID chip and an antenna electrically coupled thereto. The RFID chip includes a temperature sensor, while the antenna is adapted to receive energy from an RF field and produce a signal. A shielding structure and/or a thermally conductive or absorbent structure may be associated with the RFID chip. The shielding structure is oriented so as to be positioned between at least a portion of the RFID chip and an outside environment and configured to shield the temperature sensor from at least one environmental factor capable of affecting a temperature sensed by the temperature sensor of an article to which the RFID device is secured. The thermally conductive or absorbent structure is oriented so as to be positioned between at least a portion of the RFID chip and the article and configured to enhance thermal coupling between the temperature sensor and the article.