PLATE TYPE MICROWAVE ANTENNA

摘要

PURPOSE: To prevent a measurement error by making radiation output inside a plane perpendicular to the surface of an antenna far smaller than the radiation output inside the plane passed through two beams. CONSTITUTION: This antenna is constituted of plural mutually parallel linear sub gratings a1-a4 or only one linear sub grating, the respective sub gratings are constituted of plural radiation bodies bi arranged on the left and right of a sub grating power feeder (d), the sub gratings a1-a4 are common-mode power fed and the length of a power feeder (f) between the two adjacent radiation bodies b1 and b'1 of the sub gratings a1-a4 is the integral multiple of a guiding wavelength at the using frequency of the antenna on the substrate of a printed circuit board where the radiation bodies are printed. At least one bend part is provided on the sub grating power feeder (d) between the two adjacent radiation bodies of the same one sub grating and a projection distance to an axis parallel to the short direction of the sub grating between the two adjacent radiation bodies of the same one sub grating is smaller than the dimension of the radiation bodies in the short direction.