ANTENNA UNIT, TRAFFIC SIGNAL TOOL, AND TRAFFIC SIGNAL CONTROLLER

摘要

PROBLEM TO BE SOLVED: To provide a signal tool with a built-in antenna as a new technical means which never impairs the appearance of a road by dispensing with a strut for antenna setting.SOLUTION: The signal tool 1 includes an optical unit 2 and an antenna 4. The optical unit 2 includes a substrate 8 mounted with an LED 7 on the front side, and a cover member 9 having visible light permeability and covering the LED 7 from the front side. The antenna 4 is incorporated to the optical unit 2 on the rear side of the cover member 9.