摘要
提出了一种间接改变天线辐射体长度的方法。该方法通过改变天线馈线中地导体的长度,间接地改变天线辐射体的长度,有效避免了有源开关对天线辐射性能的影响。为验证此方法,设计了一个共面波导馈电的频率可重构印刷单极子天线,该天线利用PIN二极管来改变馈电端地的长度。实验结果表明:控制开关的工作状态,可使天线的谐振频率发生明显的变化。相应的中心频率分别为1.9 GHz和2.3 GHz,相对阻抗带宽分别为20.8%和17.2%。
A method was presented to change the length of the antenna＇s radiator indirectly. By changing the length of the feed line＇s ground, then the length of the antenna＇s radiator was changed. This method effectively avoids the impact of the active switches on antenna＇s radiation performance. In order to verify this method, a CPW-fed frequency reconfigurable printed monopole antenna was designed. The length of the feed line＇s ground was changed by PIN diodes. The experiment results show that after the working conditions of the switches are changed, the resonant frequency of the antenna can be obvious changed. The center frequencies of the antenna are 1.9 GHz and 2.3 GHz and the relative impedance bandwidths are 20.8% and 17.2%.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2013年第5期39-41,共3页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.61071018)
广西自然科学基金资助项目(No.2012jjAAG0090)
