摘要:
An antenna device includes coil antennas (100A, 100B, 100C, 100D) each including a coil conductor wound around a winding axis and a planar conductor (11) including a surface and an edge end portion, the surface extending along the winding axis of the coil conductor, the edge end portion being adjacent to a coil opening of the coil conductor. A current flowing through the coil conductor induces a current in the planar conductor (11), this current produces a magnetic flux in a direction normal to the planar conductor (11), and thus the planar conductor acts as a booster antenna. The antenna device (201) has directivity in the direction normal to the planar conductor (11) because the magnetic flux produced by the coil antennas (100A, 100B, 100C, 100D) and that produced by the planar conductor (11) are combined. This enables the antenna device to occupy a small area while achieving a predetermined communication distance.
摘要:
An antenna device includes coil antennas (100A, 100B, 100C, 100D) each including a coil conductor wound around a winding axis and a planar conductor (11) including a surface and an edge end portion, the surface extending along the winding axis of the coil conductor, the edge end portion being adjacent to a coil opening of the coil conductor. A current flowing through the coil conductor induces a current in the planar conductor (11), this current produces a magnetic flux in a direction normal to the planar conductor (11), and thus the planar conductor acts as a booster antenna. The antenna device (201) has directivity in the direction normal to the planar conductor (11) because the magnetic flux produced by the coil antennas (100A, 100B, 100C, 100D) and that produced by the planar conductor (11) are combined. This enables the antenna device to occupy a small area while achieving a predetermined communication distance.
摘要:
A multilayer electronic component that can suppress the formation of projections and depressions on a surface and an electronic component unit including the multilayer electronic component are provided. Coil electrodes (8) having a shape of ring-shaped wiring with a part removed therefrom are electrically connected to each other to constitute a coil (L). Magnetic layers (4) are stacked together with the plurality of coil electrodes (8). The coil electrodes (8a, 8c, 8e) having a radius r1 and the coil electrodes (8b, 8d) having a radius r2 that is smaller than the radius r1 are alternately arranged in a stacking direction.
摘要:
To constitute an antenna device in which characteristic fluctuations due to changes in the distance between a wireless IC device and a reader/writer are suppressed, and the wireless IC device which can perform communication with high reliability. In order to send/receive a wireless communication signal to/from an external device such as a reader/writer, an antenna resonant circuit (AR) is constituted by an antenna coil (La) and a capacitor (Ca), and an additional resonant circuit (LC1) is constituted by an inductor (L1) and a capacitor (C1). The additional resonant circuit (LC1) is connected to the antenna resonant circuit (AR), thereby constituting an antenna device (101). The antenna device (101) and a wireless IC (21) constitute a wireless IC device (201).
摘要:
There is provided at antenna apparatus capable of stably communicating with a communication partner and increasing the maximum possible communication range even when the antenna apparatus is relatively smaller than an antenna in the communication partner and the two antennas are disposed in close proximity on the same axis. A coil window (CW) of an antenna coil module (3) and a conductor aperture (CA) of a conductive layer (2) at least partly overlap. A magnetic flux (MF) passing through the coil window (CW) passes through the conductor aperture (CA). On the other hand, the magnetic flux does not pass through the conductive layer (2). Accordingly, the magnetic flux (MF) is diverted to a path in which the conductor aperture (CA) of the conductive layer (2) is the inside and the outer edge of the conductive layer (2) is the outside. As a result, the magnetic flux (MF) passing through the coil window (CW) of the antenna coil module (3) makes a relatively large loop and links the inside and the cutside of a coil conductor (41) in an antenna (4) in a reader/writer.
摘要:
There are provided a signal line and a circuit substrate that are capable of being easily inflected and reducing unnecessary radiation. A signal line (32) is a linear conductor provided within a laminated body (12). A ground conductor (30) is provided on a positive direction side in a z axis direction within the laminated body (12), compared with the signal line (32), and overlaps with the signal line (32) in planar view from the z axis direction. A ground conductor (34) is provided on a negative direction side in the z axis direction within the laminated body (12), compared with the signal line (32), and overlaps with the signal line (32) in planar view from the z axis direction. Via hole conductors (B1 to B36) connect the ground conductors (30, 34) to each other. In the ground conductor (30), a plurality of opening portions (O1 to 08) are provided so as to be arranged along the signal line (32) in planar view from the z axis direction. The via hole conductors (B1 to B36) are provided between the opening portions (O1 to 08) adjacent to one another, in an x axis direction.