| 摘要 |
An antenna device (40) for a hand portable phone (1) having a first conducting layer (41) acting as resonator plane, a second conducting layer (24) arranged substantially in parallel with the first conducting layer (41) and acting as ground plane for the antenna device (40), and feeding means (22,23,42) connected to said first (41) and the second conducting layer (24) for feeding an RF signal to the antenna device (40). The first conducting layer (41) is provided as a radiating pattern having a common frequency part (39) coherent with two further parts where said common frequency part (39) in combination with said two further parts defines a first radiating element (48) and a second radiating element (49), respectively. Capacitive couplings are provided between the first (41) and the second (24) conducting areas adjacent to the crossing areas between said common frequency part (39) and the respective one of said two further parts. The capacitive couplings (58,54) are used for tuning the resonance frequencies of the radiating elements (48,49). The antenna device is arranged on the dual-band portable phone (1) and is adapted for communication via a cellular network (GSM 900MHz and GSM 1800MHz). <IMAGE> |
