Patent ID: 8818301
Filing Date: 2014-08-26
Classification: H04B

Abstract:
1. A transmission device in which a plurality of transmitting units are adjacently disposed, comprising: the transmitting units having; first and second rectangular printed circuit boards disposed so that surfaces thereof are mutually parallel and surfaces on one side of each of the first and second printed circuit boards are in mutual opposition; a plurality of columnar connecting conductors furnished between the first printed circuit board and the second printed circuit board, the columnar connecting conductors being adapted for affixing one of the printed circuit boards to the other of the printed circuit boards with a predetermined interval therebetween, and conductively connecting a printed wiring of one of the printed circuit boards and a printed wiring of the other of the printed circuit boards; an electronic component forming a transmission circuit being mounted at one end portions of the first and second printed circuit boards in a lengthwise direction; a coil-shaped antenna that has a center axis extending in a width direction of the first and second printed circuit boards at the other end portions of the first and second printed circuit boards in the lengthwise direction; and a planar conductor plate affixed to the first printed circuit board, parallel to the other surface of the first printed circuit board at the other end portion thereof, each of the transmitting units having the planar conductor plate, wherein in an xyz orthogonal coordinate system, only two of the transmitting units are disposed so as to be adjacent in a z axis direction, and so that the planar conductor plates are opposed to each other, two of the transmitting units that are adjacent in an x axis direction being disposed so that the one end portion of one of the transmitting units and the other end portion of the other of the transmitting units are adjacent, and two of the transmitting units that are adjacent in a y axis direction being disposed so that the one end portion of one of the transmitting units and the other end portion of the other of the transmitting units are adjacent.