ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS

摘要

An antenna device (106) is provided with an antenna element (11), and an impedance conversion circuit (25) connected to the antenna element (11). The impedance conversion circuit (25) is connected to the feeding end of the antenna element (11). The impedance conversion circuit (25) is inserted between the antenna element (11) and a feeding circuit (30). The impedance conversion circuit (25) is provided with a first inductance element (L1) connected to the feeding circuit (30), and a second inductance element (L2) coupled to the first inductance element (L1). A first end of the first inductance element (L1) is connected to the feeding circuit (30), a second end thereof is connected to the antenna, a first end of the second inductance element (L2) is connected to the antenna element (11), and a second end thereof is connected to a ground.