| 摘要 |
PURPOSE:To reduce lengthwise variations in level when synthesizing and receiving signals from two couples of induction lines by an inductive radio communication system. CONSTITUTION:Couples 5 and 6 of lines each have an l-length open part 7 and a closed part 8, which is provided with a cross part 9 to obtain a structure which hardly has the evil influence of a noise and seldom sends a disturbing wave. With regard to length, l1<=l2, and a difference in signal level between the center of a part where the closed parts 8 of couples 5 and 6 of lines coincide mutually and that where open parts 7 of them coincides mutually is set to about 3dB. Then, signals transmitted from the antenna 4 of a moving body 3 are supplies to those couples of lines with a phase difference pi/2 and synthesized, so that the level of the composite signal is constant without reference to a (z)-directional shift is position. |
