Design DGS Low-Pass Filters

fuz

Design of Low-Pass Filters Using Defected Ground Structure
简介:Abstract—A method to design low-pass filters (LPF) having a defected
ground structure (DGS) and broadened transmission-line
elements is proposed. The previously presented technique for obtaining
a three-stage LPF using DGS by Lim et al. is generalized
to propose a method that can be applied in design N-pole LPFs
for N< 5. As an example, a five-pole LPF having a DGS is designed
and measured. Accurate curve-fitting results and the successive
design process to determine the required size of the DGS
corresponding to the LPF prototype elements are described. The
proposed LPF having a DGS, called a DGS-LPF, includes transmission-
line elements with very low impedance instead of open stubs
in realizing the required shunt capacitance. Therefore, open stubs,
tee- or cross-junction elements, and high-impedance line sections
are not required for the proposed LPF, while they all have been essential
in conventional LPFs. Due to the widely broadened transmission-
line elements, the size of the DGS-LPF is compact.
格式:pdf
大小:631K