Title:
円状方向検知アンテナ
Document Type and Number:
Japanese Patent JP4362677
Kind Code:
B2
Abstract:
An antenna system that includes a plurality of mounting plates arranged in a generally circular configuration. Each mounting plate has an inside surface and an outside surface. Each antenna element has a high frequency end and a low frequency end. The low frequency end of each antenna element is mounted to the inside surface of one of the mounting plates such that the high frequency ends of opposed antenna elements face each other. The high frequency ends of opposed antennas are separated by one wavelength of the signal frequency received at the high frequency end. The antenna system also includes a beamforming network having a plurality of input ports equal to the number of antenna elements. Each antenna element is coupled to the beamforming network through a respective input port.
Inventors:
Holtz Jaime Timothy Earl.
Application Number:
JP2000585963A
Publication Date:
November 11, 2009
Filing Date:
November 30, 1999
Export Citation:
Assignee:
RAYTHEON COMPANY
International Classes:
H01Q21/20; H01Q21/29; G01R29/08; G01S3/02; H01Q3/34; H01Q3/40; H01Q9/16; H01Q11/10; H01Q13/08; H01Q21/24; H01Q25/04
Domestic Patent References:
| JP3036802A | ||||
| JP10093339A | ||||
| JP9288169A |
Foreign References:
| US5164738 | ||||
| US4594595 | ||||
| US4041499 |
Attorney, Agent or Firm:
Eiji Saegusa
Kakehi Yuro
Takeshi Ohara
Hiroji Nakagawa
Yasumitsu Tate
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano
Kakehi Yuro
Takeshi Ohara
Hiroji Nakagawa
Yasumitsu Tate
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano