Wireless personal mobile and cellular communications are expected to be one of the hottest growth areas of the 2000s and beyond. They have enjoyed the fastest growth rate in the telecommunications industry. Thanks to the satellite systems, wireless personal voice and data communications can be transmitted from any part of the earth to another using a simple, hand-held device. These future systems will provide data and voice communications to anywhere in the world, using a combination of wireless telephones, wireless modems, terrestrial cellular telephones and satellites. The use of wireless remote sensing, remote identification, direct broadcast, global navigation, and compact sensors has also gained popularity in the past decade. Wireless communications and wireless sensors have become a part of a consumer’s daily life. Communication through the air means wireless! All of these wireless systems consist of a radio frequency (RF) or microwave front end. Without the RF-end, no radio-frequency wave or microwave can be send to the air. Where there’s wireless there’s the RF or microwave end in the communication system!
作者： 分类：研究 标签： 时间：2007年11月4日
上一篇：准妈妈日记（11）
下一篇：也读李开复及大学之图
家庭会客厅