Comparative Analysis of Compact Defected Microstrip Structure (DMS) with Band-Reject Characteristics

A comparative analysis of defected microstrip structure (DMS) with band-reject characteristic and high-Q is presented in this paper. This paper studies the parametric analysis on the different structure of DMS that consists of different length and width in order to produce good band-reject response at resonant of approximately 5.2 GHz. These types of structures are designed and simulated on Roger Duroid RO4350 with a dielectric constant, epsilon(r) of 3.48 and a thickness of 0.508 mm. The optimum topology of DMS with Hashtag-shape exhibits high selectivity, sharp response as well as high attenuation in the stopband. The simulation performance results show good and promising results with high Q-factor and narrow bandwidth, and therefore could be further examined in future works during experimental works. This structure of DMS is useful for microwave applications when the undesired signals need to be removed such as in wideband systems.