Small Microstrip Low-Pass Filter by using Novel Defected Ground Structure for UWB Applications
Keywords:
Defected ground structure, microstrip low-pass filter, protruded T-shaped strip, T-shaped open stubAbstract
In this paper, a novel low-pass filter using defected ground structure (DGS) slot with a protruded T-shaped strip inside the slot is presented. The resonant frequency of the slot can be easily controlled by changing the protruded Tshaped strips dimensions, without changing the area taken by the structure. Using this DGS slot, a quasi-elliptic low-pass filter was designed, fabricated, and tested. The experimental results show good agreement with simulation results and demonstrate that excellent stop-band performance could be obtained through the proposed low-pass filter. The filter has a cut-off frequency of about 3.4 GHz.
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