Contributing to their size are the installed microphone, speaker, and antenna. The devices also need a larger battery to power the complex functions of the phone.
内置话筒、扬声器、天线都使体积难以缩小，而这些新型装置也需要体积较大的电池来支持其复杂的功能。
2
Smart antenna is a complex system including array antennas digital signal processing unit and adaptive arithmetic unit.
智能天线是个复杂的系统包括天线阵列，数字信号处理单元和自适应算法单元。
3
It employs the leaky coaxial cable to replace the antenna. The sensor can make the installation's setup more agility, and it can cope with the area, which have the complex boundary.