Title:
WIDE BAND DIRECTIONAL ANTENNA
Document Type and Number:
Japanese Patent JPH04352504
Kind Code:
A
Abstract:
PURPOSE: To prevent beam width from being narrowed in the high frequency band of a used band.
CONSTITUTION: Among radio waves made incident on a reflection plate 1, one part is absorbed by a radio wave absorber 3 stuck to the outer peripheral part of the reflection plate 1, and one part is reflected by the reflection plate 1 and made incident on a feeding part 2. The radio wave absorber 3 is formed by a material which radio wave absorbing rate is gradually increased with the increase of a frequency in the used band.
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Inventors:
KOBAYASHI YUKIHIKO
NAKAI MITSUHARU
NAKAI MITSUHARU
Application Number:
JP12638291A
Publication Date:
December 07, 1992
Filing Date:
May 30, 1991
Export Citation:
Assignee:
NEC CORP
International Classes:
H01Q15/16; H01Q17/00; H01Q19/12; (IPC1-7): H01Q15/16; H01Q17/00; H01Q19/12
Attorney, Agent or Firm:
Uchihara Shin