Patent ID: 7557765

Claim:
A smart antenna with an adjustable radiation pattern comprising: a metal layer which is grounded; a plurality of slot antennas formed at the metal layer, wherein the openings of the slot antennas point to different directions; an insulated layer whose one surface is covered by the metal layer; a coaxial feeding structure provided through the insulated layer and the part of the coaxial feeding structure is electrically connected to the metal layer; a plurality of microstrip lines formed on the other surface of the insulated layer, wherein the microstrip lines respectively can feed radio frequency signals to the slot antennas; a plurality of switches for being electrically connected to the coaxial feeding structure and each of the microstrip lines; and a plurality of bias circuits respectively and electrically connected to each of the switches to control the status of the switches and adjust the operation status of the slot antennas individually so as to change the radiation pattern of the antenna.