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针对超宽带系统易受窄带信号干扰的问题,设计了一种新颖的基于金属开口谐振环结构的双陷波平面超宽带天线。通过在天线的辐射贴片上加载U形槽和在接地板上引入寄生条带的方法实现了双陷波特性。利用仿真软件研究了U形槽和寄生条带的物理尺寸对陷波特性的影响,并对所设计的超宽带天线进行了制作和测量。仿真和测试结果表明,天线在超宽带系统3.1～10.6GHz工作频段内的电压驻波比小于2,在WiMAX和WLAN频率范围具有良好的陷波特性,有效地抑制了超宽带通信系统与窄带通信系统之间潜在的干扰。
Aiming at the problem that UWB system is easily disturbed by narrowband signals, a novel double notch planar UWB antenna based on metal open-loop resonator structure is designed. Double notch characteristics are achieved by loading U-shaped slots on the radiating patch of the antenna and introducing parasitic strips on the ground plane. The influence of the physical size of the U-shaped groove and the parasitic strip on the notch characteristics was studied by simulation software. The designed UWB antenna was fabricated and measured. The simulation and test results show that the VSWR of the antenna in the operating frequency band of 3.1 ~ 10.6GHz in UWB system is less than 2, and has good notch characteristics in the WiMAX and WLAN frequency ranges, effectively suppressing the UWB communication system from narrowband Potential interference between communication systems.