The spiral antenna which possesses wide directivity beam width

摘要

Topic In order to use for the position detection system or the Distance Measuring Equipment of the high order accuracy where recently needs have increased, being small-sized, it is cheap, furthermore the circularly polarized wave directivity antenna whose directivity beam width is wide is offered.SolutionsAs for the spiral antenna which possesses wide directivity beam width, the coaxial cable from the coaxial connector 9 where is provided in the edge of one side of 8 which is jointed to the joint terminal which is unbalanced at least, balance of spiral antenna 1a, 1b and the aforementioned spiral antenna which are formed to the surface of the dielectric of the cylinder or conical condition the joint terminal which is done tip/chip balun in order to convert to the joint terminal which is unbalanced and the aforementioned tip/chip balun printed circuit board through inside 3 of the antenna apex which includes 4 and the aforementioned dielectric and the aforementioned coaxial cable or the input/output terminal and the radome which covers the whole it is constituted. Choice figure Drawing 1