| 摘要 |
PURPOSE:To eliminate effectively a disturbing wave incoming from an optional angle with one set of antenna and to ensure stably a gain of a required receiving wave in the wave incoming direction, by arranging plural elements in parallel with each other and obliquely to an arm. CONSTITUTION:A reflector 11, a radiator 12 and each element of plural wave directors 13 are arranged in parallel with each other and obliquely to the arm 14. The center of the radiator 12 is taken as the original of coordinates, a line prolonged from the elements is taken as phi=90 deg. and the orthogonal direction is taken as phi=0 deg.. Further, the angle of arrangement of the elements to the arm 14 is taken as theta and the direction of main beam is taken as phi=theta-alpha. Thus, the disturbing wave is eliminated over a wide range with one set of antenna in this way and the phase of feeding is not required to be changed. Further, the drop in power gain in the direction of main beam is not much. |
