SECTOR BEAM ANTENNA DEVICE WITH SCATTERING BODY

Japanese Patent JP3470657

B2

PROBLEM TO BE SOLVED: To obtain a sector beam antenna device having a scattering body which obtain desired wide sector beams.
SOLUTION: This device has parallel flat plates 1 composed of the combination of two parallelly arranged conductor flat plates 1a and 1b of which interval ranges between the half-wave length of a used wavelength and one wavelength, a primary radiator block 2 including an H bend function inserted between the two parallel flat plates, an input opening 3 opened in the plate 1a for feeding power to the block 2 and a scattering body 5 composed of a conductor provided parallelly to an opening 4 with a fixed distance apart from the opening 4 corresponding to the open end of the plates 1, and is constructed by providing the body 5 parallelly with the opening separated from the opening of an antenna composed of the plates 1 by a prescribed distance. It is possible to freely form the beam shape (radiation directivity) of radio waves radiated from an open part in a face perpendicular to the parallel plates by providing the body 5 composed of a bar-shaped or plate-shaped conductor in parallel with the opening in the vicinity of the opening to be the open part of the parallel flat plates.

Norihiko Omuro

JP29705999A

November 25, 2003

October 19, 1999

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NEC

H01Q19/18; H01Q3/14; H01Q13/22; H01Q13/28; H01Q15/18; H01Q17/00; H01Q19/185; H01Q19/28; (IPC1-7): H01Q19/18; H01Q13/22; H01Q15/18

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【文献】米国特許2825062(US,A)

Takao Maruyama

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