二層の膜面からなる伝送線路の折り畳みによる機械的・電気的特性の影響

抄録

This research aims to clarify the effects of folding on the mechanical and electrical characteristics of a transmission line consisting of two membrane layers. To realize a lightweight and compact membrane antenna, it is essential to clarify the transmission characteristics of a transmission line when it is folded. In this research, we investigated (1) the geometry of a transmission line with a folding habit, (2) the series impedance and parallel admittance of a transmission line when it is deformed, and (3) the relationship between the folding habit and the reflection coefficient. First, for (1), the tension and initial deflection angle effects on the membrane were significant, while the impact of spring stiffness on the membrane shape was small. Next, for (2), it becomes clear that the same theory of inhomogeneous transmission lines can be used for lines with varying widths, such as tapered transmission lines, and lines with different thicknesses in a distributed manner, such as two membrane layer transmission lines. Finally, for (3), it becomes clear that the reflection coefficient approaches zero when the tension is strong, the folding habit is weak, and the reflection coefficient increases when the tension is weak or the folding habit is strong.