| 摘要 |
PURPOSE:To radiate radio waves in a direction parallel to a printed board and opposed to a power supply circuit side by making the end surface opposed to the power supply circuit side of a wide thin film conductor close to the end surface of the printed board and short-circuiting the power supply circuit side with an earth conductor. CONSTITUTION:The earth conductor 3 consisting of a thin film conductor is formed on one surface of the printed board 1, a wide thin film conductor 2 is formed on the other surface and a power supply line 4 consisting of a strip line is formed on one end of the conductor 2. An end surface P on the opposite side of the power supply line 4 of the wide thin film conductor 2 is formed so as to be close to the end surface Q of the printed board 1 and galvanized through holes 8 are formed on the power supply circuit side. The printed board 1 is short-circuited with the earth conductor 3 through said through holes 8 and the end surface P of the wide thin film conductor 2 almost coincides with the end surface Q of the printed board 1, so that the electric field shown as 5 in the figure is formed and radio waves are radiated in the direction of (x). |
