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针对Bagley多边形功分器(BPD)在低频率下尺寸较大的缺点,提出了一种基于缺陷地结构(DGS)的小型化Bagley多边形功分器设计方法。通过该方法设计的小型化Bagley多边形功分器在每条臂上都使用了一级或两级DGS结构。为了验证该设计方法,仿真、制作、测量并比较了两种基于FR4基板的1.62 GHz BPD功分器,一种使用传统的微带线结构,另一种使用了DGS来减小尺寸。使用了DGS的BPD电性能和传统设计相当,同时它的尺寸减少了50%。
Aiming at the disadvantage of large size of Bagley polygon splitter (BPD) at low frequencies, a design method of compact Bagley polygon splitter based on defect structure (DGS) is proposed. The miniaturized Bagley polygon splitter designed by this method uses a one-stage or two-stage DGS structure on each arm. To validate this design methodology, two 1.62 GHz BPD splitters based on the FR4 substrate were simulated, fabricated, measured, and compared, one using a conventional microstrip configuration and the other using DGS to reduce the size. The BPD with DGS has the same electrical performance as the traditional design, and its size is reduced by 50%.