Abstract: An antenna apparatus includes: a ground plane having a slit extending from an edge to an inside first point and extending, along the edge, to a second point; a first antenna element having a first feed point and a first open end, the first feed point being arranged at an opposite side of an area surrounded by the slit and the edge with respect to the slit, the first antennae element extending from the first feed point to a first bend part at a first height position and extending to the first open end; and a second antenna element having a second feed point, arranged in the area, and a second open end, and extending from the second feed point to a second bend part at a second height position, extending to the second open end, and crossing, at a second open end side, the slit.

Abstract: A vehicle includes a transmission including an input shaft linked to a crankshaft of an engine so that power is transmitted therebetween, and an output shaft which is able to rotate at a rotational speed lower than a rotational speed of the input shaft. The snowmobile includes a driving device linked to the output shaft so that power is transmitted therebetween to generate a driving power, a supercharger including a rotation shaft linked to the output shaft so that power is transmitted therebetween, and a centrifugal clutch located between the crankshaft and the input shaft or between the output shaft and the rotation shaft.

Abstract: An antenna apparatus includes a ground plane having an edge; a monopole type first antenna element having a first feed point and configured to communicate at a first frequency; and a monopole type second antenna element having a second feed point and configured to communicate at a second frequency, the second antenna element extending from the second feed point in a direction away from the edge. An end portion of the first antenna element is arranged closer to the ground plane than an end portion of the second antenna element is. A length of an interval between the first feed point and the second feed point is in a range of from 0.25-fold to 0.7-fold of an electrical length of a first wavelength at the first frequency. A length of the second antenna element is a length in a range of from 0.15-fold to 0.55-fold of the electrical length.

Abstract: An antenna apparatus includes a ground plane having an edge; a feed element having a feed point located close to the edge and a first open end, the feed element extending from the feed point to the first open end and serving as an inductor; a parasitic element having a second open end disposed a predetermined distance away from the first open end and a connection end connected to the edge, the parasitic element extending from the connection end to the second open end, a length from the connection end to the second open end being set to be a quarter wavelength of an electrical length of a wavelength in a communication frequency; and a metal member disposed between the first second open ends via a predetermined interval to cover the first and second open ends to constitute a predetermined capacity between the first and second open ends.

Abstract: An RFID tag includes: a base portion in a plate shape made of dielectric material; a loop antenna formed by etching and including a first antenna element and a second antenna element disposed in a loop shape along an outer periphery of the base portion; and an IC chip inserted to the loop antenna in series and including a first electrode and a second electrode.

Abstract: A planar antenna includes a substrate formed of a dielectric; a distributed constant line formed on a first surface of the substrate, the distributed constant line including a first end to which power is supplied and a second end that is an open end or is grounded; and at least one first resonator arranged on the first surface of the substrate and within a range in which the at least one first resonator is allowed to be electromagnetically coupled to the distributed constant line in a vicinity of any of nodal points of a standing wave of a current that flows through the distributed constant line in response to a radio wave having a certain design wavelength radiated from the distributed constant line or received by the distributed constant line.

Abstract: A planar antenna includes: first and second conductors each of which forms a microstrip line in combination with a ground electrode, and which are arranged in parallel with each other on a substrate; a plurality of first resonators disposed between the first conductor and the second conductor which electromagnetically couple the first conductor at one longitudinal end of each of the first resonators to generate electric fields which are in phase with each other; and at least one second resonator disposed between the first conductor and the second conductor which electromagnetically couples the second conductor at one longitudinal end of the at least one second resonator to generate an electric field which is in phase with the electric fields generated by the plurality of first resonators, wherein the at least one second resonator is arranged alternately with the plurality of first resonators.

Abstract: An RFID tag includes: a base portion in a plate shape made of dielectric material; a loop antenna formed by etching and including a first antenna element and a second antenna element disposed in a loop shape along an outer periphery of the base portion; and an IC chip inserted to the loop antenna in series and including a first electrode and a second electrode.

Abstract: A non-transitory computer-readable storage medium storing an antenna design program that causes a computer to execute a process, the process including acquiring a target characteristic value of a target antenna when a value of a structure parameter is a predetermined value, based on the predetermined value of the structure parameter, the target characteristic value, and a relation, with respect to a reference antenna, between a value of a structure parameter and a characteristic value, estimating the relation with respect to the target antenna, the reference antenna having a same shape feature as the target antenna, an antenna type of the reference antenna being different from the target antenna, determining a value of the structure parameter for the target antenna such that the characteristic value of the target antenna satisfies a demanded specification based on the estimated relation, and outputting the determined value of the structure parameter.

Abstract: An RFID tag includes a base part, a loop antenna around the base part including a first antenna element and a second antenna element, and a loop-length shorter than a wavelength of a resonant frequency, and an IC chip at a first surface side of the base part. The IC chip is connected between a first terminal disposed on a first end of the first antenna element and a second terminal disposed on a first end of the second antenna element. The loop antenna includes an overlapping part at a second surface side of the base part, and a capacitance of the overlapping part is adjusted such that a difference between an imaginary component of a first synthetic impedance and an imaginary component of a second synthetic impedance is less than or equal to a predetermined value.

Abstract: A snowmobile has a structure that reduces and minimizes adverse affects of snow on a throttle motor. The snowmobile includes a snowmobile body including an engine room therein, an engine which is disposed inside the engine room, a throttle valve arranged to adjust intake air supplied to the engine, a throttle motor arranged to drive the throttle valve and disposed ahead of the engine, and an air box arranged to pass the intake air through toward the engine, disposed ahead of the engine and including a portion located ahead of the throttle motor.

Abstract: An antenna device includes a board including an attachment face for attaching to an object, a rectangular plane antenna element arraying an layer of the board other than the attachment face, including two terminals, and having a longitudinal direction, and a planar parasitic element arraying so as to be adjacent to the plane antenna element in the longitudinal direction.

Abstract: A frequency characteristic adjusting jig attached to a loop antenna includes: a conductive first member which is located along an outer periphery of a loop for a portion of a conductor forming the loop antenna, and which is electromagnetically coupled or electrically connected to the portion of the conductor; a conductive second member which is located along the outer periphery of the loop for another portion of the conductor, and which is electromagnetically coupled or electrically connected to the other portion of the conductor; and a conductive third member which connects the first and second members together via a different path than a path formed along the loop. The first and second members are chosen to have a length along the loop such that a frequency characteristic of the loop antenna is shifted according to the length.

Abstract: An antenna apparatus includes a ground plane, a first dielectric layer disposed on the ground plane, a conductive line having a feeding point and an open end or a short end and disposed on the first dielectric layer, a second dielectric layer disposed on the first dielectric layer, a plurality of first conductive elements disposed on the second dielectric layer so that the first conductive elements intersect with the conductive line at a plurality of first positions corresponding to nodes of a standing wave of current flowing through the conductive line, and one or more second conductive elements disposed on the second dielectric layer so that the one or more second conductive elements intersect with the conductive line at second positions corresponding to antinodes of the standing wave between the second end and the first position closest to the second end among the the first positions.

Abstract: A loop antenna includes first and second conductors configured to have conductivity, the first conductor including first and second patterns, the first pattern being provided along a first surface and including a first feed point, and the second pattern being coupled to the first pattern at a first end of the first surface and being provided to oppose the first pattern; and a second conductor configured to have conductivity, the second conductor including third and fourth patterns, the third pattern being provided on the first surface with a gap generating a capacitance between the first pattern and including a second feed point, the fourth pattern being electrically coupled to the third pattern at a second end opposing the first end on the first surface, the fourth pattern overlapping the second pattern so as to cause capacitive coupling or being connected to the second pattern.

Abstract: A planar antenna includes: first and second conductors each of which forms a microstrip line in combination with a ground electrode, and which are arranged in parallel with each other on a substrate; a plurality of first resonators disposed between the first conductor and the second conductor which electromagnetically couple the first conductor at one longitudinal end of each of the first resonators to generate electric fields which are in phase with each other; and at least one second resonator disposed between the first conductor and the second conductor which electromagnetically couples the second conductor at one longitudinal end of the at least one second resonator to generate an electric field which is in phase with the electric fields generated by the plurality of first resonators, wherein the at least one second resonator is arranged alternately with the plurality of first resonators.

Abstract: A loop antenna includes first and second conductors configured to have conductivity, the first conductor including first and second patterns, the first pattern being provided along a first surface and including a first feed point, and the second pattern being coupled to the first pattern at a first end of the first surface and being provided to oppose the first pattern; and a second conductor configured to have conductivity, the second conductor including third and fourth patterns, the third pattern being provided on the first surface with a gap generating a capacitance between the first pattern and including a second feed point, the fourth pattern being electrically coupled to the third pattern at a second end opposing the first end on the first surface, the fourth pattern overlapping the second pattern so as to cause capacitive coupling or being connected to the second pattern.

Abstract: An RFID tag includes a base part, a loop antenna around the base part including a first antenna element and a second antenna element, and a loop-length shorter than a wavelength of a resonant frequency, and an IC chip at a first surface side of the base part. The IC chip is connected between a first terminal disposed on a first end of the first antenna element and a second terminal disposed on a first end of the second antenna element. The loop antenna includes an overlapping part at a second surface side of the base part, and a capacitance of the overlapping part is adjusted such that a difference between an imaginary component of a first synthetic impedance and an imaginary component of a second synthetic impedance is less than or equal to a predetermined value.

Abstract: A frequency characteristic adjusting jig attached to a loop antenna includes: a conductive first member which is located along an outer periphery of a loop for a portion of a conductor forming the loop antenna, and which is electromagnetically coupled or electrically connected to the portion of the conductor; a conductive second member which is located along the outer periphery of the loop for another portion of the conductor, and which is electromagnetically coupled or electrically connected to the other portion of the conductor; and a conductive third member which connects the first and second members together via a different path than a path formed along the loop. The first and second members are chosen to have a length along the loop such that a frequency characteristic of the loop antenna is shifted according to the length.

Abstract: A vehicle includes a transmission including an input shaft linked to a crankshaft of an engine so that power is transmitted therebetween, and an output shaft which is able to rotate at a rotational speed lower than a rotational speed of the input shaft. The snowmobile includes a driving device linked to the output shaft so that power is transmitted therebetween to generate a driving power, a supercharger including a rotation shaft linked to the output shaft so that power is transmitted therebetween, and a centrifugal clutch located between the crankshaft and the input shaft or between the output shaft and the rotation shaft.