Broadcasting network by satellite, with its wide frequency band and vast overlay, ACTS as an excellent medium for the widespread of information.

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。

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For the indoor wireless communication system, a new dual-band antenna with U-shaped reflector is designed. By increasing the thickness of the air medium, the wider frequency band is achieved.

对于室内覆盖无线接收系统，提出了一种新型的基于U型反射板的双频天线单元形式，采用厚的空气介质层以展宽带宽。

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