By inserting a slot at the edge of the rectangular slot on the ground plane and loading a C-shaped resonator near the microstrip line, dual band-notched characteristic at the central frequency at 3.
通过在地板上的矩形槽的边缘开槽和在馈线旁加载C形谐振器，该天线实现在中心频率3。
2
During the near three decades, high - frequency ground wave radar detecting for sea has been regarded for its high performance by many countries.
近三十年来，高频地波对海探测雷达因其本身所特有的优点而引起了许多国家的高度重视。
3
In the same measuring point, the reduction effect to the noise with high frequency was significant nearby the surface.