DRAHTLOSE KOMMUNIKATIONSVORRICHTUNG

摘要

An antenna device and a wireless communication apparatus that are capable of obtaining a plurality of resonant frequencies and varying the plurality of resonant frequencies over a wide range are provided. A first antenna unit 2 of an antenna device 1 includes a feed electrode 4, a first radiation electrode 5, and a first frequency-variable circuit 6-1. The first frequency-variable circuit 6-1 includes first and second reactance circuits 6A and 6B each including a variable-capacitance diode. A control voltage Vc is applied to the first frequency-variable circuit 6-1, and the resonant frequency of the first antenna unit 2 can thus be varied. A second antenna unit 3 includes the feed electrode 4, a second radiation electrode 7, and a second frequency-variable circuit 6-2. The second frequency-variable circuit 6-2 includes first and third reactance circuits 6A and 6C each including a variable-capacitance diode. A control voltage Vc is applied to the second frequency-variable circuit 6-2, and the resonant frequency of the second antenna unit 3 can thus be varied.