中文摘要：

提出了一种小型化频率电调微带缝隙天线，通过在螺旋缝隙上加载PIN开关二极管，实现了良好的频率可调特性．谐振缝隙采用平面螺旋结构，天线结构更加紧凑，尺寸较传统直缝隙天线减小了40％．由于开关直接加载于辐射很弱的螺旋非辐射缝隙，天线电调特性对开关性能的敏感程度显著降低，更容易实现频率重构特性．

英文摘要：

A novel miniaturized microstrip slot antenna with tunable frequency is proposed. Due to adopting a plane spiral structure, the antenna configuration is more compact, and the size is reduced by approximately 40% compared with a conventional straight slot antenna. By Loading PIN diode switches on the spiral slot, the antenna achieves a good frequency tuning property. Because these switches are directly located on the non-radiation slot, the influence of switches on the frequency tuning property of the antenna is reduced obviously, and the frequency tuning property can be realized more easily.