Title:
偏波切換・指向性可変アンテナ
Document Type and Number:
Japanese Patent JP4027967
Kind Code:
B2
Abstract:
A polarization switching/variable directivity antenna according to the present invention includes a radiation conductor plate 12 on a front face, and a ground conductor plate 14 on a rear face, of a dielectric substrate 11. At least one directivity switching element and at least two polarization switching elements are provided within the ground conductor plate 14 on the rear face. The directivity switching element includes a first slot which is formed by a removing a loop-like portion from the ground conductor plate 14 and at least two directivity switching switches ( 22 a to 22 d). Each polarization switching element includes a first slot which is formed by removing a loop-like portion from the ground conductor plate 14 and at least one polarization switching switch ( 23 a to 23 d). Switching of a maximum gain direction of radiation directivity of the antenna is realized through control of the directivity switching switches 22 a to 22 d, and switching of the rotation direction of a circularly polarized wave which is emitted from the antenna is realized through control of the polarization switching switches 23 a to 23 d.
Inventors:
Akio Matsushita
Fujishima Takeyasu
Fujishima Takeyasu
Application Number:
JP2007529300A
Publication Date:
December 26, 2007
Filing Date:
March 08, 2007
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01Q3/44; H01Q13/08; H01Q15/24; H01Q21/24
Domestic Patent References:
| JP2905747B2 | ||||
| JP2005159401A | ||||
| JP9307350A | ||||
| JP1191282A | ||||
| JP20065679A | ||||
| JP2003110322A |
Foreign References:
| WO2005062421A1 | ||||
| WO2006004156A1 |
Other References:
藤島丈泰,接地導体形態制御アンテナの開発,2004年電子情報通信学会 通信ソサイエティ大会 B-1-140,日本,電子情報通信学会,2004年
Attorney, Agent or Firm:
Seiji Okuda