国际移动卫星通信系统为用户提供广泛的和日益增加的语音频带数据和传真业务。
The Inmarst system offers the user a large and growing range of voice band data and facsimile services.
卫星广播电视网以其频带宽、覆盖面广的优点，为信息的传播提供了非常良好的媒介。
Broadcasting network by satellite, with its wide frequency band and vast overlay, ACTS as an excellent medium for the widespread of information.
具有圆极化和宽频带特点的宽带导航接收天线成为近年卫星接收天线研究的热点之一。
One of the focuses on the research of the satellite navigation receiver antenna is that of circular polarization and broadband.
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