为降低窄带信号对超宽带的干扰,对具有带阻特性的超宽带天线进行了研究,提出了1种对Wi MAX频段和C波段具有带阻特性的超宽带单极子天线.天线由馈电网络、缺陷型辐射贴片及部分接地板组成,通过在天线的矩形辐射单元上刻蚀出宽度不同的十字形槽及I形槽,使得天线在3.3-3.7 GHz及3.7-4.2 GHz频段出现阻带,有效抑制了Wi MAX无线通信(工作频段为3.3-3.7 GHz)和C波段卫星通信(下行频段为3.7-4.2 GHz)等两种窄带信号对超宽带的干扰.天线尺寸为28×25×1.6 mm3,仿真分析结果表明,天线带宽为3.09-10.71GHz,其合成阻带为3.3-4.5 GHz,包含了3.3-3.7 GHz及3.7-4.2 GHz两个频段,实现了辐射方向图H面的全向特性和E面稳定性. In order to reduce the interference of narrow-band signals to ultra-wideband, an ultra-wideband antenna with band-stop characteristic is studied, and an ultra-wideband monopole antenna with band-stop characteristics for Wi MAX and C-band is proposed. Network, defective radiating patches and a part of the ground plane. The antennas are exposed in the frequency band of 3.3-3.7 GHz and 3.7-4.2 GHz by etching the rectangular cross-shaped grooves and the I-shaped grooves with different widths on the rectangular radiating elements of the antenna Band, which effectively suppresses the ultra-wideband interference caused by two narrow-band signals such as Wi MAX wireless communication (working band 3.3-3.7 GHz) and C-band satellite communication (downlink band 3.7-4.2 GHz), and the antenna size is 28 × 25 × 1.6 mm3. The simulation results show that the antenna bandwidth is 3.09-10.71 GHz, the synthetic stopband is 3.3-4.5 GHz, and the frequency range is 3.3-3.7 GHz and 3.7-4.2 GHz. Directional and E-plane stability.