These two zeros can be varied by the DGS dimensions. For example, a longer dumbbell-arm or thinner slot-line alters the transmission-zeros to be lower frequencies. Considering thebandpass characteristics are kept, two key DGS geometrical parameters; i.e. the open-loop edge length (L) and the openend (g) locations, which can significantly affect the centerfrequency, FBW and also the transmission-zero frequencies, are investigated in the following sub sections. In addition, the open-end locations are assumed to be symmetrically placed inorder to simplify the design.
đang được dịch, vui lòng đợi..
