| 摘要 |
PURPOSE:To obtain an antenna in which circularly polarized wavls can be generated in a wide band. CONSTITUTION:In the antenna equipped with a radiating face having a print pattern constituted of the two conductors of a constant angular spiral curve formed on a plane print circuit board, one end of a taper-shaped feeder whose width is narrow is connected with each of the two conductors, and the other end whose width is wide is connected with a feeder. A conical reflecting board is provided at the back face of the radiating face, and the shortest distance and the longest distance between the reflecting board and the radiating face are respectively 1/4 of the wavelength of an upper limit frequency and a lower limit frequency. |
