Title:
ANTENNA DEVICE
Document Type and Number:
Japanese Patent JP3781074
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a antenna device simple in device configuration, excellent in workability at the time of installation and capable of receiving radio waves from plural satellites with excellent sensitivity while realizing miniaturization.
SOLUTION: In order to receive the radio waves from the two adjacent satellites by a small-sized reflection mirror, it is required to reduce the interval L of the two waveguides 140a and 140b of a feed horn. On the other hand, opening parts 141a and 141b interfere with each other on the relation of securing an opening area required for obtaining prescribed reception sensitivity. Then, the mutually interfering part of the opening parts 141a and, 141b is formed so as to be notched while leaving a partition wall 146. Thus, the radio waves from the two adjacent satellites are received with the required sensitivity by using a small-sized parabolic reflection mirror.
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Inventors:
Zenichi Yoshida
Application Number:
JP17063497A
Publication Date:
May 31, 2006
Filing Date:
June 26, 1997
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H01Q13/02; H01Q19/17; H01Q3/08; H01Q25/00; (IPC1-7): H01Q13/02; H01Q3/08; H01Q19/17
Domestic Patent References:
| JP6069722A | ||||
| JP6314926A | ||||
| JP57157603A | ||||
| JP6326510A | ||||
| JP5299391A |
Attorney, Agent or Firm:
Yoichiro Fujishima