Title:
PHASED ARRAY ANTENNA SYSTEM
Document Type and Number:
Japanese Patent JP3435916
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To smoothen change in the gain of an array antenna in the case of beam scanning by arranging a radio wave absorber at a position on an element antenna board where no element is in existence, thereby suppressing multiple reflection with a radome.
SOLUTION: This antenna system is provided with an element antenna board 2 on which plural element antennas 1 are arranged, a phase shifter 3 connecting to the element antennas 1, a feeder circuit 4, a radome 5 arranged in front of the element antenna board 2 in parallel with the board, a radio wave absorbing body 6, which is arranged onto the element antenna board 2 where no element antenna 1 is in existence. An electromagnetic emitted from each element antenna 1 at a wide angle is reflected in the radome 5 and the reflected electromagnetic wave is absorbed by the radio wave absorbing body 6 without being reflected in the antenna board 6. As the element pattern of the element antennas 1, the element pattern without a ripple and not affected by the multiple reflection between the antenna element 2 and the radome 5 is obtained and a gain change at beam scanning time is smoothened.
Inventors:
Takashi Ishii
Application Number:
JP19185695A
Publication Date:
August 11, 2003
Filing Date:
July 27, 1995
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01Q17/00; H01Q1/42; H01Q3/30; H01Q3/36; H01Q21/06; H01Q21/28; (IPC1-7): H01Q21/06; H01Q1/42; H01Q17/00
Domestic Patent References:
| JP575338A | ||||
| JP4140905A | ||||
| JP4120903A | ||||
| JP715224A | ||||
| JP5299931A | ||||
| JP54609U | ||||
| JP59125110U |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)