Open AccessHigh Band Rejection Improvement for Coupled Line Using Defected Ground Structure Technology
Author(s) -
Ameer Basheer Yousif,
Ahmed S. Ezzulddin
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1105/1/012030
Subject(s) - diplexer , band pass filter , resonator , filter (signal processing) , line (geometry) , return loss , electronic engineering , coupling (piping) , dielectric , equivalent circuit , topology (electrical circuits) , computer science , materials science , electrical engineering , optoelectronics , engineering , mathematics , voltage , mechanical engineering , antenna (radio) , geometry
In this article a high band rejection has been achieved by using Defected Ground Structure (DGS) technology depending on adding couple poles to improve the inverter and resonator, it will get a high rejection characteristic with good return loss by using this technology. The proposed coupling filter applied to a bandpass diplexer filter with two bands of 2.6 GHz and 6 GHz implemented on RO4350 substrate has a dielectric constant of 3.67 with 14×75 mm overall dimensions. The design technique for the suggested coupled - line filter is implemented based on the theory of coupled - line filters and the DGS equivalent circuit. The simulation results after using DGS show better agreements with theoretical results.