| 摘要 |
PURPOSE:To improve both the cross polarized wave characteristic and the beam shaping by combining beams in a horizontal plane with an array antenna and combining beams in a vertical plane by means of a main reflecting board comprising plural conductor plane boards. CONSTITUTION:The array antenna 40 as a radiator consists of a waveguide slot antenna and the main reflecting board consists of a reflecting board comprising partial reflecting boards 50, 51, 52 being conductor plane boards. The reflecting axis of each partial reflecting board is arranged in parallel with the Y axis and the entire reflecting board is symmetrical with respect to the XZ plane. The slot of the antenna 40 is excited by a current of the waveguide, the amplitude is adjusted mainly by the dimension S and the relative exciting phase among slots is adjusted mainly by the dimension L. Thus, no cross polarized component is included basically in the wave source by using an element having excellent cross polarized wave identification as each radiation element and the beam shaping is attained. Thus, the excellent cross polarized wave characteristic is obtained without cancelling the cross polarized wave component included in the wave source. |
