Patent ID: 6052086
Filing Date: 2000-04-18
Classification: H01Q

Abstract:
An antenna device comprisingan array antenna including a plurality of patches arrayed on a first surface of a base board and a plurality of feeders connected to respective ones of said patches so as to radiate or receive an electromagnetic wave via said patches, said plurality of patches comprising a plurality of first patches and a plurality of second patches forming first and second antennas, said feeders connected to said first patches being formed on said first surface of said base board, said feeders connected to said second patches being formed on a second surface of said base board opposite to said first surface;a first transmitting and receiving circuit for feeding or receiving electrical signals to or from said first patches of said array antenna;a second transmitting and receiving circuit for feeding or receiving electrical signals to or from said second patches of said array antenna,wherein said first transmitting and receiving circuit is provided on said first surface of said base board, said second transmitting and receiving circuit is provided on said second surface of said base board, and said first and second transmitting and receiving circuits are both positioned on a same side of said patches, anda circuit for optionally selecting ones of said first and second patches for changing the directivities of said first and second antennas with respect to each other.