| 摘要 |
PURPOSE:To synthesize a fanned beam having a large angle and excellent radiation characteristics by constituting one reflecting mirror system by using three parabolic cylinder reflecting mirrors in combination, and by feeding it by >=1 primary radiator. CONSTITUTION:A radio wave radiated by a primary radiator 9 and reflected by a parabolic cylinder reflecting mirror 1 has maximum radiation in a Z-axial direction and changes into a fanned beam having a fanned expansion in a Y-Z plane. Similarly, radio waves radiated by the primary radiator 9 and reflected by parabolic cylinder reflecting mirrors 2 and 3 change into fanned beams having fanned expansions respectively. The energy of a leakage radio wave among the radio waves radiated from the primary radiator 9 is radiated collectively to the circumference of a main beam and utilized effectively to synthesize the main beam. Therefore, unnecessary radiation power having a large angle is reduced by the decrement of a leakage current. |
