Li Yingsong, Li Wenxing, Ye Qiubo
College of Information and Communications Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China.
ScientificWorldJournal. 2013 Oct 3;2013:402914. doi: 10.1155/2013/402914. eCollection 2013.
A coplanar waveguide (CPW)-fed circular slot antenna with wide tunable dual band-notched function and frequency reconfigurable characteristic is designed, and its performance is verified experimentally for ultra-wideband (UWB) communication applications. The dual band-notched function is achieved by using a T-shaped stepped impedance resonator (T-SIR) inserted inside the circular ring radiation patch and by etching a parallel stub loaded resonator (PSLR) in the CPW transmission line, while the wide tunable bands can be implemented by adjusting the dimensions of the T-SIR and the PSLR. The notch band reconfigurable characteristic is realized by integrating three switches into the T-SIR and the PSLR. The numerical and experimental results show that the proposed antenna has a wide bandwidth ranging from 2.7 GHz to 12 GHz with voltage standing wave ratio (VSWR) less than 2, except for the two notch bands operating at 3.8-5.9 GHz and 7.7-9.2 GHz, respectively. In addition, the proposed antenna has been optimized to a compact size and can provide omnidirectional radiation patterns, which are suitable for UWB communication applications.
设计了一种具有宽可调双频带陷波功能和频率可重构特性的共面波导（CPW）馈电圆形缝隙天线，并通过实验验证了其在超宽带（UWB）通信应用中的性能。双频带陷波功能通过在圆环辐射贴片内部插入一个T形阶梯阻抗谐振器（T-SIR）以及在CPW传输线上蚀刻一个加载并联短截线的谐振器（PSLR）来实现，而宽可调频段可通过调整T-SIR和PSLR的尺寸来实现。陷波频段的可重构特性通过在T-SIR和PSLR中集成三个开关来实现。数值和实验结果表明，除了分别在3.8 - 5.9 GHz和7.7 - 9.2 GHz工作的两个陷波频段外，所提出的天线具有2.7 GHz至12 GHz的宽带宽，电压驻波比（VSWR）小于2。此外，所提出的天线已被优化为紧凑尺寸，并可提供全向辐射方向图，适用于UWB通信应用。
