noun
reflection coefficient
Technical term in physics and engineering, especially in optics, electromagnetics, and transmission line theory. Describes the ratio of reflected wave amplitude to incident wave amplitude.
このアンテナの反射係数は0.2以下に抑えられている。
The reflection coefficient of this antenna is kept below 0.2.
反射係数が大きいと、信号の反射が強くなる。
When the reflection coefficient is large, signal reflection becomes strong.
Compound of 反射 (reflection) and 係数 (coefficient). A straightforward technical term with no special historical derivation.