Abstract:
An antenna module includes an antenna element including coil patterns and via conductors coupling together two adjacent two coil patterns. At least one of the coil patterns has a spiral shape, is wound three or more turns parallel or substantially parallel to an outer edge of a principal surface of a multilayer body, includes a first partial pattern including an outer end portion, a second partial pattern extending parallel or substantially parallel with the first partial pattern and being adjacent to the first partial pattern with a first gap provided therebetween, and a third partial pattern extending parallel or substantially parallel with the second partial pattern and being adjacent to the second partial pattern with a second gap provided therebetween, the second gap being smaller than the first gap.
Abstract:
An antenna module includes a base including two opposing mounting surfaces, an antenna coil provided on or in the base so as to define an opening, the antenna coil having a shape that is symmetrical or substantially symmetrical with respect to a reference plane, and an IC chip and a plurality of electronic components mounted on one of the mounting surfaces and electrically coupled to the antenna coil, the IC chip and the electronic components being arranged inside the opening when viewed in plan from a normal direction of the mounting surface. At least two of the plurality of electronic components are arranged so as to be symmetrical or substantially symmetrical to each other with respect to the reference plane when viewed in plan from the normal direction.
Abstract:
An antenna module includes an antenna element including coil patterns and via conductors coupling together two adjacent two coil patterns. At least one of the coil patterns has a spiral shape, is wound three or more turns parallel or substantially parallel to an outer edge of a principal surface of a multilayer body, includes a first partial pattern including an outer end portion, a second partial pattern extending parallel or substantially parallel with the first partial pattern and being adjacent to the first partial pattern with a first gap provided therebetween, and a third partial pattern extending parallel or substantially parallel with the second partial pattern and being adjacent to the second partial pattern with a second gap provided therebetween, the second gap being smaller than the first gap.
Abstract:
An antenna module includes a base including two opposing mounting surfaces, an antenna coil provided on or in the base so as to define an opening, the antenna coil having a shape that is symmetrical or substantially symmetrical with respect to a reference plane, and an IC chip and a plurality of electronic components mounted on one of the mounting surfaces and electrically coupled to the antenna coil, the IC chip and the electronic components being arranged inside the opening when viewed in plan from a normal direction of the mounting surface. At least two of the plurality of electronic components are arranged so as to be symmetrical or substantially symmetrical to each other with respect to the reference plane when viewed in plan from the normal direction.
Abstract:
A chip component includes external terminals on a mounting surface thereof at positions that are rotationally symmetric to each other by 180 degrees with respect to a center of the mounting surface. A substrate includes first and second mounting terminals on the mounting surface of the substrate at first diagonal positions of a square indicated by a two dot chain line, and third and fourth mounting terminals on the surface of the substrate at second diagonal positions of the square. The first and fourth mounting terminals are connected by a first terminal connecting portion, and the second and third mounting terminals are connected by a second terminal connecting portion. The chip component is configured to be mounted in any of four directions obtained by rotating the chip component every 90 degrees and achieves the same electrical characteristics.
Abstract:
A wireless communication system includes a mobile terminal that performs a one-time password generating function, a fixed terminal capable of activating a necessary operation in response to authentication of an entered one-time password, and a server connected to the fixed terminal. The fixed terminal includes an RFID tag. The mobile terminal includes an RFID reader/writer capable of performing RFID communication with the tag, and a first generator that is connected to the reader/writer and that generates a first one-time password based on ID information of the tag. The server includes a second generator that generates a second one-time password based on the ID information of the tag, and an authenticator that checks and authenticates the first one-time password and the second one-time password. The first and second generators generate the first and second one-time passwords, respectively, from the ID information of the tag based on a rule common to both generators.
Abstract:
An antenna module includes an antenna element including coil patterns and via conductors coupling together two adjacent two coil patterns. At least one of the coil patterns has a spiral shape, is wound three or more turns parallel or substantially parallel to an outer edge of a principal surface of a multilayer body, includes a first partial pattern including an outer end portion, a second partial pattern extending parallel or substantially parallel with the first partial pattern and being adjacent to the first partial pattern with a first gap provided therebetween, and a third partial pattern extending parallel or substantially parallel with the second partial pattern and being adjacent to the second partial pattern with a second gap provided therebetween, the second gap being smaller than the first gap.