Mobile communication terminal e.g. mobile telephone, has shifting unit connected to ground of printed circuit board for shifting resonant frequency of battery outside transmission and/or reception frequency band of radiocomunication system

摘要

The terminal has a printed circuit board (104) with grounding points, and mounted with a radiocommunication system transmitting and receiving in a frequency band. A resonant frequency shifting unit (107) is connected to the ground of the board by electromagnetic coupling. The unit (107) shifts the resonant frequency of a battery (106) outside the transmission and/or reception frequency band of the system.