无线电频带
无线电频带-
近年来，移动通信迅猛发展，使无线电通信频带成为一个有限而宝贵的自然资源。
In recent years , the rapid development of mobile communication , making radio communication frequency band into a limited and valuable natural resources .
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基于认知无线电的MB-UWB频带冲突研究铌酸盐无铅压电薄膜的脉冲激光沉积制备研究
On Cognitive Radio Multiband UWB : Spectrum Study on the Preparation of Niobate Lead-free Piezoelectric Ceramic Films by Pulse Laser Deposition