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Electromagnetic Bandgap Structures (EBGSs) Assisted Microstrip Bandpass Filter

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dc.contributor.advisor Mollah, Prof. Dr. Md. Nurunnabi
dc.contributor.author Sadi, Abu Talha
dc.date.accessioned 2018-08-08T12:40:35Z
dc.date.available 2018-08-08T12:40:35Z
dc.date.copyright 2015
dc.date.issued 2015-08
dc.identifier.other ID 1203554
dc.identifier.uri http://hdl.handle.net/20.500.12228/209
dc.description This thesis is submitted to the Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Science in Electrical and Electronic Engineering, August 2015.
dc.description Cataloged from PDF Version of Thesis.
dc.description Includes bibliographical references (pages 109-117).
dc.description.abstract In high performance of wireless communication and advanced modern technologies, the demand for large bandwidth, high efficiency radio frequency devices, ease of installation, low profile antennas with the microwave devices are required tremendously. To meet these requirements the new technique Electromagnetic Bandgap Structures (EBGSs) have been introduced as potential means of improving the performances of existing RF active and passive devices. EBGSs are periodic structures those exhibit distinct passband and stopband properties. These are the unique properties of this structure. The thesis concern the planner EBGS in forms of conventional circular, square, rectangular and dumbbell shaped defected ground structures (DGSs). The investigations into different types of EBGSs that yield better passband, return loss, insertion loss, low ripple and wider stopband have been carried out. The parametric study of different shaped EBGSs have been conducted with their inter element spacing, width, length and the size of the slots. From the investigation, it is clear that 1-D EBGS yield similar performance like 2-D EBGS. It is also found that dumbbell shaped DGS is more compact than the conventional EBGS. For conventional EBGS, it found that etching area is an important factor for producing stopband. In case of dumbbell shaped DGS, narrower slot and its position play important role to produce stopband. The novel design is used in asymmetric coupled line bandpass filters. It is found that EBGSs suppress second and third harmonics by about 40 dB. This illustrates the significance of EBGs in suppression of higher order harmonics of the bandpass filters. It has been found that the non - uniform distribution of EBGSs is more effective to suppress higher order harmonics than the conventional uniform EBGSs. Dumbbell shape DGSs are very effective for simultaneous suppression of both 2nd and 3rd harmonics due to their very wide stopband performances. This phenomenon of dumbbell shaped DGSs has been demonstrated in various designs of asymmetric coupled line bandpass filters. en_US
dc.description.statementofresponsibility Abu Talha Sadi
dc.format.extent 117 pages
dc.language.iso en_US en_US
dc.publisher Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh. en_US
dc.rights Khulna University of Engineering & Technology (KUET) thesis/ dissertation/internship reports are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
dc.subject Electromagnetic Bandgap Structures en_US
dc.subject Microstrip Bandpass Filter en_US
dc.subject Wireless Communication en_US
dc.title Electromagnetic Bandgap Structures (EBGSs) Assisted Microstrip Bandpass Filter en_US
dc.type Thesis en_US
dc.description.degree Master of Science in Electrical and Electronic Engineering
dc.contributor.department Department of Electrical and Electronic Engineering


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