US 6,983,173 B2
Telecommunications device
Tetsuhiko Miyatani, Tokyo (Japan)
Assigned to Hitachi Kokusai Electric Inc., Tokyo (Japan)
Filed on Jun. 27, 2002, as Appl. No. 10/180,506.
Claims priority of application No. 2001-217816 (JP), filed on Jul. 18, 2001.
Prior Publication US 2003/0017852 A1, Jan. 23, 2003
Int. Cl. H04M 1/00 (2006.01)
U.S. Cl. 455—562.1 20 Claims
OG exemplary drawing
 
1. A telecommunications device wherein wireless signal communication is conducted using multiple communications antennas while controlling an overall directivity of the multiple communications antennas, the telecommunications device comprising:
at least one monitor antenna, installed separately from the multiple communications antennas controlled to achieve a prescribed overall directivity, for wirelessly receiving signals from the multiple communications antennas;
directivity information acquisition means for acquiring, based on the signals received by the monitor antenna, information regarding the overall directivity of the multiple communications antennas; and
directivity information output means for outputting the directivity information acquired by the directivity information acquisition means to an external achieved directivity accuracy monitoring means adapted to monitor the accuracy of achieved overall directivity of the multiple communications antennas based on a difference between the directivity information and directivity information predicted to be acquired by the directivity information acquisition means when the prescribed directivity is achieved.