Title:
ANTENNA DEVICE
Document Type and Number:
Japanese Patent JP2000137068
Kind Code:
A
Abstract:
To enhance azimuth detection performance by reducing the amount of coupling between sending and receiving sides by means of simple constitution.
Two opposed shield plates 13, 14 are provided between a sending antenna 11 and a receiving antenna 12 while being spaced apart from each other by, e.g. a wavelength of 0.75 or more, preferably a wavelength of 1.25 to 2.5. Thus the amount of coupling between the sending and receiving sides is reduced to reduce the amount by which electric waves radiated from the sending antenna go around the receiving antenna.
Inventors:
KUSUNOKI MASAHIRO
ISO YOICHI
KOJIMA MASARU
ISO YOICHI
KOJIMA MASARU
Application Number:
JP31123398A
Publication Date:
May 16, 2000
Filing Date:
October 30, 1998
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD
International Classes:
H01Q17/00; G01S7/02; G01S7/03; H01Q1/52; (IPC1-7): G01S7/02; G01S7/03; H01Q1/52; H01Q17/00
Attorney, Agent or Firm:
Koji Nagato