Abstract: An RFID tag has an antenna element including an antenna substrate equipped with an IC chip and a conductor pattern, an artificial medium, and a first insulation layer sandwiched between the antenna element and the artificial medium. The artificial medium has a single first conductive element placed on an upper surface of a dielectric layer and a single second conductive element placed on a lower surface of the dielectric layer.

Abstract: An artificial medium includes: a dielectric layer having a front surface and a back surface; a plurality of first grid lines respectively formed on the front surface and the back surface and extending in a first direction and a plurality of second grid lines extending in a second direction different from the first direction; and electrically conductive elements respectively formed on the front surface and the back surface of the dielectric layer and located in areas where the first grid lines intersect the second grid lines, wherein when an electromagnetic wave propagated in the direction of the thickness of the dielectric layer is incident, a current excited by the electromagnetic wave is increased in a prescribed operating frequency and a current loop is formed in a plane parallel to the direction of the thickness.

Abstract: An RFID tag is characterized by including a loop feeding element formed on a base material; an IC chip that is electrically connected to the loop feeding element and that is laid on the base material; and an artificial medium that includes a dielectric layer having a first surface and a second surface, a first conductive layer laid over the first surface, and a second conductive layer laid over the second surface and on which the base material is stacked, wherein the first surface is placed closer to the loop feeding element than the second surface; and, when viewed from a stack direction in which the loop feeding element is stacked on the artificial medium, the loop feeding element is placed so as to enclose a part of an edge portion of the first conductive layer of the artificial medium.

Abstract: An RFID tag has an antenna element including an antenna substrate equipped with an IC chip and a conductor pattern, an artificial medium, and a first insulation layer sandwiched between the antenna element and the artificial medium. The artificial medium has a single first conductive element placed on an upper surface of a dielectric layer and a single second conductive element placed on a lower surface of the dielectric layer.

Abstract: An artificial medium includes: a dielectric layer having a front surface and a back surface; a plurality of first grid lines respectively formed on the front surface and the back surface and extending in a first direction and a plurality of second grid lines extending in a second direction different from the first direction; and electrically conductive elements respectively formed on the front surface and the back surface of the dielectric layer and located in areas where the first grid lines intersect the second grid lines, wherein when an electromagnetic wave propagated in the direction of the thickness of the dielectric layer is incident, a current excited by the electromagnetic wave is increased in a prescribed operating frequency and a current loop is formed in a plane parallel to the direction of the thickness.

Abstract: An artificial medium on which two or more conductive surfaces are provided in a thickness direction, the conductive surface being provided with conductive elements in a two-dimensional periodic array, wherein when an electromagnetic wave propagated in parallel to the thickness direction is incident on the artificial medium, a current excited by the electromagnetic wave increases in an operation frequency, and a current loop is formed in a surface parallel to the thickness direction is provided.

Abstract: A antenna device, which includes a first dielectric substrate having a patch conductor disposed thereon; a second dielectric substrate having a grounding conductor disposed on a confronting substrate surface confronting the patch conductor; and a conductor for electromagnetic coupling, extending from the confronting substrate surface of the second dielectric substrate toward the first dielectric substrate, is provided. The antenna device is small and is capable of being mounted to a windowpane for a vehicle since the conductor for electromagnetic coupling is not connected to the grounding conductor with respect to a direct current and since the conductor for electromagnetic coupling and the patch conductor are electromagnetically coupled each other.

Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.

Abstract: A display unit includes a conductive portion 1. When it is assumed that there is an imaginary straight line m1, which extends in a direction perpendicular to a longitudinal direction of a dipole antenna 2, passes through a center of the dipole antenna 2 and is parallel to an antenna surface of the dipole antenna 2, the dipole antenna 2 is disposed on a lateral side of the display unit so that the imaginary straight line m1 is parallel to a display screen, is parallel to an upper side 1a or a lower side 1b of a main surface of the conductive portion and passes a lateral portion of the conductive portion 1.

Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.

Abstract: A antenna device, which includes a first dielectric substrate having a patch conductor disposed thereon; a second dielectric substrate having a grounding conductor disposed on a confronting substrate surface confronting the patch conductor; and a conductor for electromagnetic coupling, extending from the confronting substrate surface of the second dielectric substrate toward the first dielectric substrate, is provided. The antenna device is small and is capable of being mounted to a windowpane for a vehicle since the conductor for electromagnetic coupling is not connected to the grounding conductor with respect to a direct current and since the conductor for electromagnetic coupling and the patch conductor are electromagnetically coupled each other.

Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.

Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.