一种单极子超宽带四陷波天线设计

A Monopole Ultra-Wideband Antenna Design with Quad Bands-Notched

超宽带(Ultra Wide Band,UWB)天线在通信领域至关重要,但由于超宽带频段和窄带通信频段互有交叉,为了消除某些窄带信号的干扰,设计了一种微带馈电的单极子四陷波超宽带天线。该天线由矩形金属贴片作为辐射贴片获得超宽带特性,通过在辐射贴片上刻蚀两个不同尺寸的矩形开环谐振器,以及把相互嵌套的U形寄生带耦合在微带馈线附近来获得天线的陷波特性。HFSS电磁仿真和实际测量表明:该天线的工作范围为3.1~11.1 GHz,有效滤除了全球微波接入互联(World Interoperability for Microwave Access,WiMAX)波段(3.54~3.82 GHz)、印度国家卫星系统(Indian National Satellite System,INSAT)波段(4.45~4.62 GHz)、无线局域网(Wireless Local Area Network,WLAN)波段(5.38~5.76 GHz)和X波段下行频(6.87~7.26 GHz)。天线结构简单,易于加工,陷波频段可单独调节,天线实物和模拟吻合度较好,具有一定的工程价值。

Ultra-wideband(UWB)antennas are crucial in the field of communications.However,the ultra-wideband frequency band and the narrowband communication system cross each other.In order to eliminate the interference of some narrowband signals,a microstrip-fed with quad bands-notched ultra-wideband antenna is designed.Ultra-wideband characteristics are obtained using rectangular metal patch as radiating patch.Notched band characteristics are obtained by etching two rectangular open-loop resonators of different sizes on the radiating patch and coupling of nested U-shaped parasitic bands in the vicinity of the microstrip feed line.HFSS electromagnetic simulation and actual measurement show that the antenna operates in the range of 3.1~11.1 GHz.The world interoperability for microwave access(WiMAX)band(3.54~3.82 GHz),indian national satellite system(INSAT)band(4.45~4.62 GHz),wireless local area network(WLAN)band(5.38~5.76 GHz)and X-band downlink frequency(6.87~7.26 GHz)are effectively filtered out.The antenna structure is simple and easy to process.The notch frequency band can be adjusted separately.The antenna is in good agreement with the simulation,which has some engineering value.