一种陷波可重构的超宽带天线设计与研究

该文设计了一种具有四陷波及可重构特性的超宽带天线。通过在天线辐射贴片、微带馈线上刻蚀U形槽,以及在改进型地板上添加环形开口寄生单元来实现天线四陷波特性。采用在陷波结构中加入PIN二极管开关的方法实现陷波可重构特性,通过开关的断开与闭合,分别实现三陷波和四陷波特性,从而进一步提高了超宽带频段的利用率。分析了天线陷波产生的原理,研究了天线部分尺寸参数对陷波的影响。通过仿真和实物测量结果对比表明,该天线在3～11.74 GHz频段内可有效抑制窄带系统的干扰。天线尺寸为24 mm×16 mm×0.8 mm,结构较紧凑,可广泛用于各种超宽带通信系统。

Design and Research of a Band Notch Reconfigurable UWB Antenna

An ultra wideband antenna with four band notched and reconfigurable characteristics is designed in this paper. The four notch characteristics of the antenna are realized by etching a U shaped slot slit on the antenna radiation patch and the microstrip feed line, and adding an annular opening parasitic element on the modified floor. The trapping reconfigurable characteristic is realized by adding a PIN diode switch in the band notch structure, and the three band notch and four band notch characteristics are respectively realized by the opening and closing of the switch, thereby the utilization ratio of the ultra wideband frequency band are further improved. The principle of antenna band notch generation is analyzed, and the influence of antenna size parameters on the notch is studied. The comparison between the simulation and measurement results shows that the antenna can effectively suppress the interference of narrow band systems in the 3 11.74 GHz. The size of the antenna is 24 mm×16 mm×0.8 mm, and the structure is compact. It can be widely used in various UWB communication systems.