When a conductive layer occupying a large area is provided in a coiled antenna portion, it has been difficult to supply power stably. A memory circuit portion and a coiled antenna portion are disposed by being stacked together; therefore, it is possible to prevent a current from flowing through a conductive layer occupying a large area included in the memory circuit portion, and thus, power saving can be achieved. In addition, the memory circuit portion and the coiled antenna portion are disposed by being stacked together, and thus, it is possible to use a space efficiently. Therefore, downsizing can be realized.

A noncontact communication medium includes an antenna coil that is formed on a substrate having a through-hole and induces power with application of a magnetic field from an outside, and a processing circuit that operates using the power induced by the antenna coil. The processing circuit is inserted in the middle of the antenna coil. The antenna coil is wound in a loop shape along an outer periphery of the substrate. An outer peripheral end of the antenna coil is connected to the through-hole. A portion of the antenna coil on the substrate facing a position of the through-hole has a shape recessed to an inner peripheral side of the antenna coil in a winding direction.

A noncontact communication medium comprises an antenna coil that is formed in a substrate and induces power with application of a magnetic field from an outside, and a processing circuit that operates using the power induced by the antenna coil. The substrate has a plurality of layers in a thickness direction. The antenna coil is wound in a loop shape in a first layer among the plurality of layers. One end and the other end of the antenna coil are electrically connected through an auxiliary antenna coil wound in a loop shape in a second layer different from the first layer among the plurality of layers. At least one of the first layer or the second layer is buried in the substrate.

Described is an antenna comprising two oppositely wound antenna coils, each antenna coil formed by concentric conductor coils. An outermost conductor coil of one antenna coil is conductively connected to an outermost conductor coil of the other antenna coil via a shared conductive portion. An innermost conductor coil of each antenna coil terminates in a bridge connector, and a bridge conductively links the bridge connectors.

Various embodiments provide a handheld electronic device capable of magnetic field communication. The handheld electronic device includes: a first cover, a second cover, a memory, a display, a processor, first and second antennas, and at least one sensor. The memory stores instructions that enable the processor to: store payment information in the memory; display at least one image or text related to the payment information on the display, in response to at least part of a user input; determine whether a payment process starts by using the electronic device; and transmit, according to the determination as to whether a payment process starts, a first signal related to the payment information via the first antenna, and allow an external device to read the payment information via the second antenna.

An antenna device is provided as a near-field communication antenna device that is configured by arranging a plurality of loop antennas. Each loop antenna includes a plurality of parallel circuits each having a capacitor and a resistance element; and a plurality of looped conductors in a shape of a loop that is divided. The divided looped conductors are connected to each other via the parallel circuits, and the plurality of looped conductors and the plurality of parallel circuits form a loop.

A method for manufacturing a metal card includes: a step for forming a metal card by laminating a stack of sheets in which are stacked a plurality of sheets, centered on a metal sheet, including adhesive sheets having the same size as the metal sheet, an upper inlay sheet having a first antenna, and a lower inlay sheet having a second antenna; a step for forming a COB accommodation space, which can accommodate a COB, by milling a certain area of the metal card using computerized numerical control (CNC) machining; a step for forming a through-hole, which exposes the first antenna and the second antenna, by milling a COB contact point region of the COB accommodation space down to the lower inlay sheet; a step for electrically connecting the first antenna and the second antenna by dispensing a conductive elastic liquid into the through-hole; and a step for bidirectionally connecting the first antenna and the second antenna to the COB by attaching the COB within the COB accommodation space so that the COB contact point is connected by the conductive elastic liquid.

An RFID tag including an RFIC element, a first inductor element that includes a first insulating substrate having a mounting surface on which the RFIC element is mounted, and first coil-shaped antenna internally embedded in first insulating substrate with a winding axis perpendicular to the mounting surface, and second inductor element that includes second insulating substrate mounted on the mounting surface, and second coil-shaped antenna internally embedded in second insulating substrate, electrically connected to first coil-shaped antenna, and with a winding axis parallel to the mounting surface. The first insulating substrate includes a laminate with dielectric layers or magnetic layers laminated, and the first coil-shaped antenna includes a laminate coil-shaped antenna in which conductor patterns are each formed on a corresponding one of the layers of the laminate, such that they are connected to each other through interlayer connection conductor.

An attention tag for a retail article that includes a label having an adhesive region bonded to a retail article and a protruding region that protrudes from the retail article when the label is attached thereto. Moreover, an RFID tag is disposed on the label and includes an RFIC element and an antenna pattern including first and second antenna portions that are respectively connected to first and second ends of the RFIC element. Moreover, the first antenna portion is disposed in the protruding region of the label while the second antenna portion of the RFID tag is disposed in the adhesive region of the label at a position facing a portion of the retail article.

Smartcards (SC) having a metal layer (ML) or metal card body (MCB) and a module opening (MO) for a transponder chip module (TCM). A slit (S) or notch (N) in the metal card body may extend from a peripheral edge of a metal layer or card body, without extending to the module opening. A flexible circuit (FC) with one or two patch antennae (PA) or sense coils (SeC) connected to a coupling loop structure (CLS) with an antenna structure (AS) on the same substrate may be incorporated into the card body (CB). A fingerprint sensing module comprising an electrically-conductive metal bezel housed in the card may be electrically isolated from the metal layer or metal card body by the application of coatings (DLC) or anodizing (oxidizing) the respective metal surfaces. The cards may be contactless only, contact only, or dual-interface (contact and contactless).