초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A flat antenna device comprising:a radiation element sheet including a metallic radiation element on a sheet selected from the group consisting of a film and a mesh, said radiation element sheet having a coefficient of thermal expansion;a grounding conductor sheet having

[ What is claimed is:] [1.] A flat antenna device comprising:a radiation element sheet including a metallic radiation element on a sheet selected from the group consisting of a film and a mesh, said radiation element sheet having a coefficient of thermal expansion;a grounding conductor sheet having a metallic grounding conductor and a coefficient of thermal expansion;a frame having a central opening and disposed between and joined to said radiation element sheet and said grounding conductor sheet, said frame having a coefficient of thermal expansion smaller than the coefficients of thermal expansion of said radiation sheet and said grounding conductor sheet, thereby maintaining said radiation element sheet and said grounding conductor sheet taut at temperatures lower than a temperature at which said radiation element sheet and said grounding conductor sheet are joined to said frame; andfeeder means for feeding power to said radiation element.