LPF using Defected Ground Structure and Microstrip-line
Journal Title: International Journal of Scientific Research and Reviews - Year 2013, Vol 2, Issue 2
Abstract
This paper describes the design of a LPF that is using DGS. The analysis of the rectangular shaped defected ground structure (RS-DGS) and the application of the structure on some microwave devices.In this paper, a microstrip transmission line combined with a new U-headed dumb-bell defected ground structure (DGS) is investigated. The proposed DGS of three U-shape slots connected by a thin transverse slot is placed in the ground plane of a microstrip line. A three-cell DGS microstrip line yields a better lowpass filtering characteristics. The simulation is carried out by CST microwave studio. The equivalent circuit for the DGS and its corresponding L-C parameters are extracted by using its S parameters response (EM simulation) and a simple circuit analysis method. The proposed periodic defected ground structure (DGS) provides the excellent cutoff and stopband characteristics. Observed results show good agreement with the theoretical results. The results are validated by using CST.
Authors and Affiliations
Bhati Meenu , Dua Rajeshwar Lal
Keywords
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