A printed monopole filtenna fed by a co-planar waveguide with U-shaped split slot on patch and circular split ring resonator pairs at the other side of feed is proposed in this letter. The compact filtenna of dimension 0.32λ × 0.215λ (λ denotes wavelength corresponding to 2.68 GHz) is capable of providing large bandwidth from 2.68 to 8.72 GHz with dual frequency notch bands over 3.28–3.84 and 4.95–6.02 GHz, primarily to eliminate the WiMAX and WLAN interferences. The dual notched antenna performances are evaluated by simulation and experimental measurement and compared to those of recently reported ultra-wideband (UWB) notched antennas. The proposed filtenna provides bidirectional E-plane and omni-directional H-plane radiation patterns with gain variation of 2–4.5 dBi and average radiation efficiency of 78% in its pass band. Also the filtenna offers minimal dispersion characteristic as stable group delay response, and linear variation of transfer function (S₂₁) is achieved in its pass bandwidth.

在这封信中提出了一种印刷单极膜天线，该天线由共平面波导馈电，在馈电另一侧的贴片和圆形裂环谐振器对上具有U形裂隙，并通过共面波导馈电。维0.32的紧凑filtenna λ  ×0.215 λ（λ表示对应于2.68 GHz的波长）能够提供3.68–8.72 GHz和4.95–6.02 GHz双频陷波频段的2.68至8.72 GHz大带宽，主要是为了消除WiMAX和WLAN干扰。通过仿真和实验测量来评估双缺口天线的性能，并将其与最近报道的超宽带（UWB）缺口天线的性能进行比较。所提出的天线可以提供双向E平面和全向H平面辐射图，其通带增益变化为2-4.5 dBi，平均辐射效率为78％。此外，由于稳定​​的群时延响应，滤波器天线提供了最小的色散特性，并且在传递带宽上实现了传递函数（S ₂₁）的线性变化。