ANTENNA APPARATUS AND MOBILE COMMUNICATION TERMINAL APPARATUS

摘要

To maintain the resonance frequencies of a wide band usable in a multimode system, while allowing a diversity reception. A switching circuit (4c) located in the vicinity of a feeding part (4a) of an antenna element (402) is used to control the impedance and maintain a first resonance frequency, while switching only a second resonance frequency to a third resonance frequency. When a feeding part switching circuit (5b) is activated to switch from the feeding part to a feeding part (4d) to switch the first and second resonance frequencies to fourth and fifth resonance frequencies, the switching circuit (4c) can be used to control the impedance, while switching only the fifth resonance frequency to a sixth resonance frequency.