Light-weight flat antenna device tolerant of temperature variation

摘要

A flat antenna device is constructed such that circular patches are provided on one surface of a dielectric film, a metallic grounding conductor film is fitted to one surface of a dielectric film, a dielectric member is sandwiched between the dielectric film and the dielectric film, and an extending mechanism is provided to the periphery of the device so as to maintain the dielectric film and the dielectric film in a fully extended state. A circular microstrip patch antenna is formed by the metallic grounding conductor film and each of the circular patches.