An electronic package is provided, which includes: a substrate, an electronic element disposed on the substrate, and an antenna structure disposed on the substrate. The antenna structure has a base portion and at least a support portion, the base portion including a plurality of openings and a frame separating the openings from one another, and the support portion supporting the base portion over the substrate. Therefore, no additional area is required to be defined on a surface of the substrate, and the miniaturization requirement of the electronic package is thus met.

A radio frequency identification (RFID) transponder tag is contained in and electrically connected to a mechanically rugged metallic tag housing slotted to define a radio frequency antenna, such as a half turn antenna, and sealed with an epoxy filling.

A transaction card having an opening in a metal card body, a booster antenna in the opening, and a molding material about the booster antenna. A process for manufacturing the transaction card includes forming an opening in a card body, inserting a booster antenna into the opening, and molding a molding material about the booster antenna.

The present invention disclosed a radio-frequency identification (RFID) device. The RFID device comprises a protective body and a RFID circuit unit located inside the protective body. The RFID circuit unit comprises a printed circuit board (PCB), a RFID chip and an antenna disposed thereon. A front surface of the PCB faces a top surface of the protective body; a rear surface of the PCB faces a bottom surface of the protective body.

This disclosure describes techniques for operating an inductive coupling reader. The techniques include operations comprising: applying an excitation frequency to a resonance circuit of the inductive coupling reader; detecting a change to a resonance frequency of the resonance circuit of the inductive coupling reader; and in response to detecting the change to the resonance frequency of the inductive coupling reader, adjusting the excitation frequency being applied to the resonance circuit.

A smart card inlay comprising an inductive antenna and a DC-DC converter. The inductive antenna is configured to (i) communicate wirelessly with a card terminal, and (ii) power card circuitry via inductive coupling to the card terminal. The DC-DC converter has an input coupled to the inductive antenna and an output connectable to card circuitry. The DC-DC converter is configured to receive an input power signal from the inductive antenna and convert that input power signal to an output power signal to send to the card circuitry, the output power signal matching the operating current and/or operating voltage of the card circuitry.

A transaction card for dual interface communication of a transaction includes a card body, a chip opening, a discontinuity, and a transponder chip. The card body includes a first metal layer having an outer peripheral edge, a first metal face, and a second metal face. The chip opening includes a first chip hole transversely extending from the first metal face toward the second metal face thereby defining a first metal edge surrounding a predetermined hole shape. The discontinuity extends from the outer peripheral edge to the first metal edge. The transponder chip module has a module antenna and is configured to be received within the chip opening. The module antenna defines an outer antenna edge surrounding a predetermined antenna shape such that the predetermined antenna shape is the same as the predetermined hole shape for improved inductive coupling via the discontinuity during use.

A smart card inlay comprising an inductive antenna and a DC-DC converter. The inductive antenna is configured to (i) communicate wirelessly with a card terminal, and (ii) power card circuitry via inductive coupling to the card terminal. The DC-DC converter has an input coupled to the inductive antenna and an output connectable to card circuitry. The DC-DC converter is configured to receive an input power signal from the inductive antenna and convert that input power signal to an output power signal to send to the card circuitry, the output power signal matching the operating current and/or operating voltage of the card circuitry.

RFID devices are provided for use in combination with a food item or other temperature-sensitive item. The RFID devices include an RFID chip and an antenna electrically coupled to the RFID chip, along with a temperature-sensitive member. The temperature-sensitive member is configured to be in a first condition below a selected temperature and a second condition above the selected temperature to signify that the RFID device and associated food item or other temperature-sensitive item have been exposed to a temperature above the selected temperature. The temperature-sensitive member may be incorporated into the antenna to render the antenna at least partially inoperative above the selected temperature. The temperature-sensitive member may instead be configured to exhibit different colors below and above the selected temperature, or a single RFID device may include both types of temperature-sensitive members. Such RFID devices may also incorporate tamper-resistant features and/or accommodate human- and/or machine-readable printed symbols.

The present invention disclosed a radio-frequency identification (RFID) device. The RFID device comprises a protective body and a RFID circuit unit located inside the protective body. The RFID circuit unit comprises a printed circuit board (PCB), a RFID chip and an antenna disposed thereon. A front surface of the PCB faces a top surface of the protective body; a rear surface of the PCB faces a bottom surface of the protective body.