一种五陷波超宽带天线的设计

Design of a Quintuple Band-notched UWB Antenna

为了在所需的多个陷波频带中获得额外的谐振频率,设计了一种具有五陷波特性的超宽带单极子天线,天线包括蚀刻了两个不封闭口字型槽的秤砣形贴片、矩形微带馈电线、缺陷接地板和两个类U形谐振器。将两个类U形谐振器耦合在馈电线附近,与辐射贴片上蚀刻的两个槽及缺陷接地板共同实现五陷波特性。该天线工作带宽为3.01~12 GHz,有效滤除了WiMAX通信频段(3.73~3.89 GHz)、C频段卫星通信系统(4.25~4.9 GHz)、无线局域网通信频段(5.51~5.83 GHz)、INSAT(Indian National Satellite System)频段(6.77~7.32 GHz)和ITU 8GHz频段(8.13~8.38 GHz)的干扰,且天线在通带频段内五个陷波特性和方向性结果均吻合良好。

In order to obtain additional resonance frequencies in the required multiple notch band,an ultra-wideband(UWB)monopole antenna with five-notched characteristics is designed.The antenna includes a weight-shaped patch etched with two unsealed oral characters shape slots,a rectangular microstrip feed line,a defective ground plate and two U-shaped resonators.The five-notch characteristics are realized by making two U-shaped resonators besides the feedline and etching the two slots on the radiation patch and together with the defective ground plate.The antenna has a working bandwidth of 3.01~12 GHz,the interferences of WiMAX(3.73~3.89 GHz),C-band satellite communication system(4.25~4.9 GHz),wireless local area network(WLAN)communication band(5.51~5.83 GHz),Indian National Satellite System(NSAT)band(6.77~7.32 GHz)and ITU 8 GHz band(8.13~8.38 GHz)are effectively filtered out,and the results of antenna′s five notch characteristics and directivity in working bandwidth are in good agreement.