| 摘要 |
PURPOSE:To facilitate the construction and maintenance of an antenna and to minimize interference between transmitter by supporting a pole body grounded at its base with stays having no insulator interposed, by insulating some apex stays from the ground at their lower ends, and by using those ends as energizing points for respective waves. CONSTITUTION:Pole H which is lower than a half the shortest wavelength among those of waves to be shared and is grounded at its base is supported with stays G1'-G1''' extended in respective directions with no insulator interposed. Then, lower ends of apex stays G1' and G1'' as many as said waves among those stays are insulated from the ground and those lower ends are used as energizing points A1 and A2 for individual waves. Further, circuits Q1 2 and Q2 1 which have infinite impedance to corresponding waves and zero impedance to the other waves are interposed between those energizing points A1 and A2 and the ground. |
