Title:
MULTI-BEAM ANTENNA
Document Type and Number:
Japanese Patent JP3314904
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize an excellent directivity over a wide range by preferentially using a mirror surface with excellent beam convergence performance so as to suppress the deterioration in the directivity and a side lobe characteristic.
SOLUTION: A multi-beam antenna emits a beam from primary radiators 2a-2c as beams 3a-3c via a reflecting mirror 1. In this case, the face perpendicular to the beam direction is used for an aperture, the electric field distribution on the aperture is used for an aperture electric field distribution, and the phase corresponding to one point of a reflecting mirror in the aperture electric field distribution is used for a reference phase and a deviation between the phase in the aperture electric field distribution and a reference phase is used for an aperture phase deviation, and the aperture phase deviation corresponding to each point on the reflecting mirror face is subjected to weight mean for each beam direction. The weight mean value is obtained as to the entire reflecting mirror face, in which equi-potential lines are drawn and a contour is decided along the equi-potential lines obtained there. Thus, even when a mirror surface aberration is not neglected because the aperture diameter and the beam radiation angle range are large, the antenna is excellent in the beam convergence and the side lobe characteristic is improved.
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Inventors:
Fumio Kira
Kohei Ohata
Katsuhiko Araki
Hideki Mizuno
Kohei Ohata
Katsuhiko Araki
Hideki Mizuno
Application Number:
JP19956095A
Publication Date:
August 19, 2002
Filing Date:
August 04, 1995
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H01Q3/26; H01Q1/00; H01Q15/16; H01Q19/17; (IPC1-7): H01Q1/00; H01Q3/26; H01Q15/16; H01Q19/17
Domestic Patent References:
| JP8228108A | ||||
| JP8237023A | ||||
| JP5152835A |
Other References:
【文献】近藤彰、鹿子嶋憲一、比嘉秀光,多焦点パラボラアンテナの鏡面設計,1992年電子情報通信学会秋季大会講演論文集,日本,社団法人電子情報通信学会,1992年 9月15日,分冊2,B-53
【文献】吉良文夫、大幡浩平、水野秀樹,クラスタ給電型広角マルチビームアンテナの検討-鏡面設計の一手法-,電子情報通信学会総合大会講演論文集,日本,社団法人電子情報通信学会,1995年 3月10日,通信1,B-136
【文献】吉良文夫、大幡浩平、水野秀樹,クラスタ給電型広角マルチビームアンテナの検討-鏡面設計の一手法-,電子情報通信学会総合大会講演論文集,日本,社団法人電子情報通信学会,1995年 3月10日,通信1,B-136
Attorney, Agent or Firm:
Takashi Homma
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