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。

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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。

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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.

为了使报警装置的设置更加灵活，可以应付具有复杂边界的区域，使用泄漏同轴电缆代替天线作为感应器件。

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On Tuesday, Cooper used his keynote address at the Embedded Systems Conference in Boston to run down a list of complaints against the wireless industry that ranged from closed carrier networks to inefficient cellular antenna systems to the design of smart phones like the iPhone, which he argues are overly complex.

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