Broadcasting network by satellite, with its wide frequencyband 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。
2
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 frequencyband is achieved.