To provide an antenna device capable of controlling beam width of an electromagnetic wave to be communicated.
An antenna element 110 communicates radio waves of a plurality of wavelength bands. First and second meta-material reflectors 120, 130 and a metallic reflector 140 respectively reflect radio waves of at least one wavelength band out of the plurality of wavelength bands to be communicated. A reflector arrangement member arranges the first and second meta-material reflectors 120, 130 and the metallic reflector 140 on positions of the same ratio as a ratio of the plurality of wavelength bands of radio waves to the antenna element 110. The first and second meta-material reflectors 120, 130 form a periodic array structure in which a plurality of dielectric substances 121, 131 are periodically arrayed, and in the first and second meta-material reflectors 120, 130, beam width of a radio wave to be reflected is controlled by areas of the dielectric substances 121, 131 existing in a direction orthogonal to a radio wave direction.
| WO/2013/013462 | FRONT FEED MICROWAVE ANTENNA |
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ANDOU ATSUYA
SUGIYAMA TAKATOSHI
| JP2005070156A | 2005-03-17 | |||
| JP2011244136A | 2011-12-01 | |||
| JP2000091836A | 2000-03-31 |