Patent ID: 6915120

Claim:
An information terminal apparatus comprising: a variable directional antenna and an information terminal unit for effecting radio communication using said variable directional antenna; said information terminal unit having a transmitting/receiving means, and a processing means for determining a directivity of said variable directional antenna using said transmitting/receiving means; said variable directional antenna having a control means for controlling said directivity of said variable directional antenna in accordance with directivity data determined by said processing means of said information terminal unit; said processing means further comprising: a first means for obtaining a directivity characteristics data of said variable directional antenna by sequentially sending a plurality of directivity data to said variable directional antenna during a first period; a second means for determining an optimum directivity with the best receiving condition in accordance with obtained directivity characteristics data; and a third means for setting a directivity of said variable directional antenna, based on a result obtained by said second means during said first period; and said information terminal unit further comprising a circuit means for performing a packet communication, wherein said information terminal unit performs said packet communication by fixing said directivity of said variable directional antenna to said optimum directivity, during a second period which is different from said first period, and said information terminal unit does not perform said packet communication during said first period.