| 摘要 |
PURPOSE:To make it possible to easily detect the arrival directions of radio waves in all azimuths, by such a simple structure that a spherical lens for converging arrival electromagnetic waves to the surfaces of an incident side and an opposite side is provided and a thermal change display member for detecging said electromagnetic waves is mounted to the converging region. CONSTITUTION:A spherical Luneberg radio wave lens 14 made of a dielectric body for converging electromagnetic waves to the surfaces of an incident side and an opposite side is used and a radio wave detection means 16 is mounted to the entire predetermined region of the electromagnetic converging part on the outer peripheral surface of said lens 14 to form an electromagnetic direction indicator 12. This radio wave detection means 16 is made of a thermal change display member for catching electromagnetic energy as heat energy to display the same as heat energy to display the same and, for example, can be formed of a laminate consisting of a resistor film for converting electromagnetic energy to heat energy and a liquid crystal film for displaying the generated heat as the change in a color. By this method, because the arrival direction and converging point of electromagnetic waves correspond to 1 : 1, the arrival direction can be easily known. |
