ANTENNA DEVICE

摘要

Four antenna units (701a to 701d) arranged adjacent to one another are respectively connected to switches (702a to 702d) and connected to load impedance elements (703a to 703d) via the switches (702a to 702d) or to an output terminal (705) and a comparator (707) via a switch (704). The other ends of the load impedance elements (703a to 703d) are grounded. The comparator (707) judges which antenna unit has received a radio signal of the maximum signal level among the antenna units (701a to 701d). A controller (705) controls the switches (702a to 702d) and switch (704) so as to connect the antenna unit which has received the radio communication signal of the maximum signal level to the output terminal (705) and connect the other antenna units to the load impedance elements.