Antenna device and manufacturing method for the same
First Claim
Patent Images
1. An antenna device, comprising:
- a plurality of rod-like cores arranged in series in an axial direction, the plurality of rod-like cores including first and second rod-like cores that are arranged directly adjacent to each other via a gap;
a first coil formed by winding a conductive wire around part of the plurality of rod-like cores; and
a capacitor electrically connected to the first coil,wherein a first end surface of the first rod-like core directly faces a second end surface of the second rod-like core via the gap, and at least one of the first end surface and the second end surface is located on an inner peripheral side of the first coil, anda length of the first coil in the axial direction is shorter than each of the first and second rod-like cores in the axial direction.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna device includes: a plurality of cores arranged in series; a coil; and a capacitor connected to the coil, in which a first core, which is selected from the plurality of cores, and a second core, which is selected from the plurality of cores and is arranged on any one end portion side of the first core, are arranged apart from each other, and in which at least one end surface, which is selected from an end surface of the first core on a side on which the second core is arranged and an end surface of the second core on a side on which the first core is arranged, is located on an inner peripheral side of the coil.
3 Citations
20 Claims
-
1. An antenna device, comprising:
-
a plurality of rod-like cores arranged in series in an axial direction, the plurality of rod-like cores including first and second rod-like cores that are arranged directly adjacent to each other via a gap; a first coil formed by winding a conductive wire around part of the plurality of rod-like cores; and a capacitor electrically connected to the first coil, wherein a first end surface of the first rod-like core directly faces a second end surface of the second rod-like core via the gap, and at least one of the first end surface and the second end surface is located on an inner peripheral side of the first coil, and a length of the first coil in the axial direction is shorter than each of the first and second rod-like cores in the axial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A manufacturing method for an antenna device, comprising:
-
classifying a plurality of capacitors of the same type used for manufacture of an antenna device into one of two ranks and three ranks in accordance with capacitances of the plurality of capacitors; arranging a plurality of rod-like cores in series in an axial direction, the plurality of rod-like cores including first and second rod-like cores that are arranged directly adjacent to each other via a gap; forming a first coil by winding a conductive wire around part of the plurality of rod-like cores, a number of the windings being set according to the classified capacitor that is electrically connected to the first coil, wherein a first end surface of the first rod-like core directly faces a second end surface of the second rod-like core via the cap, and at least one of the first end surface and the second end surface is located on an inner peripheral side of the first coil and a length of the first coil in the axial direction is shorter than each of the first, and second rod-like cores in the axial direction.
-
-
20. A manufacturing method for an antenna device, comprising:
-
arranging a plurality of rod-like cores in series in an axial direction, the plurality of rod-like cores having first and second rod-like cores that are arranged directly adjacent to each other via a gap; and forming a first coil by winding a conductive wire around part of the plurality of rod-like cores, a number of the windings of the conductive wire being always set to a constant value regardless of a capacitance of a capacitor that is electrically connected to the first coil, wherein a first end surface of the first rod-like core directly faces a second end surface of the second rod-like core via the gap, and at least one of the first end surface and the second end surface is located on an inner peripheral side of the first coil, and a length of the first coil in the axial direction is shorter than each of the first and second rod-like cores in the axial direction.
-
Specification