频率与方向图可重构微带天线设计

Design of frequency and radiation pattern reconfigurable microstrip antenna

为了满足无线通信系统小型化和天线多功能的需求,设计了一种频率和方向图可重构的微带贴片天线。该天线由一个带U型槽的辐射贴片和左右对称的寄生贴片构成,通过改变辐射贴片上U型槽和寄生贴片上PIN(正-本-负)二极管的工作状态来实现天线的工作频率和方向图的改变。仿真和测试结果表明:天线的谐振频率可以在5.2 GHz和5.8 GHz之间切换,同时在两个频点都可以实现波束的左右偏转和展宽。采用这种结构的微带天线可以同时实现频率和方向图的重构,从而实现天线的多功能。

This paper presents a microstrip patch antenna with reconfigurable frequency and pattern to meet the needs of wireless communication system miniaturization and antenna multifunction. The configuration consists of a radiation patch with an U-shaped slot and two symmetrical parasitic patches. The reconfigurations of frequency and pattern can be achieved by changing the operating states of the PIN diode on the U-shaped slot and parasitic patches. Simulation and test results show that the antenna resonates at 5. 2 GHz or 5. 8 GHz,at the same time,the beam deflection and broadening can be achieved at both of the resonant frequencies. The reconfigurable frequencies and radiation patterns can be achieved by adopting the structure of a microstrip antenna,and the characteristic of multi-function is realized.