Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters

Bandpass filters perform an important filtering task in a radio transceiver. The narrow stopbands and low gradient in transition bands of conventional parallel-coupled or electromagnetic band gap (EBG) are two (2) of the challenges in designing a bandpass filter. This thesis will introduce three...

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Main Author:	Sulaiman, Ahmad Asari
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TK1-9971 Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.usm.my/45589/1/AHMAD%20ASARI%20SULAIMAN_HJ.pdf
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spelling	my-usm-ep.455892019-10-08T02:33:37Z Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters 2012-01 Sulaiman, Ahmad Asari TK1-9971 Electrical engineering. Electronics. Nuclear engineering Bandpass filters perform an important filtering task in a radio transceiver. The narrow stopbands and low gradient in transition bands of conventional parallel-coupled or electromagnetic band gap (EBG) are two (2) of the challenges in designing a bandpass filter. This thesis will introduce three (3) structures of bandpass filter. The first is a new combination of parallel-coupled and defected ground structure (DGS) that operates at a center frequency of 7.8 GHz for mobile satellite application. In essence, this combination structure has resulted to high Q-factor and slow wave which contributes to a high slope and spurious suppression. Cylindrical dielectric resonators were also applied to the circuit in order to increase the return loss in the passband or to enhance the bandwidth of the design. The Zirconate Tin Titanate, ZrSnTiO3 (  r = 37.4, tangent loss = 0.002) dielectric resonator and RO3003 substrate with dielectric constant and tangent loss of 3.0 and 0.0013 respectively were applied in this project. The overall dimension of the circuit was 47.2 mm × 19.16 mm, while the size of the rectangular DGS was 1 mm × 7.36 mm. The second structure is a combination of end-coupled and split ring resonators in a multilayer configuration that operate at 3.47 - 3.79 GHz for Worldwide Interoperability for Microwave Access (WiMAX) application. A modified split ring was introduced to obtain the additional sub-resonators from the magnetic coupled between vertical layers in order to increase the coupling effect from the multilayer structure. The Flame Retardant 4 (FR-4) substrate with dielectric constant, r of 4.6 was used as a core material. 2012-01 Thesis http://eprints.usm.my/45589/ http://eprints.usm.my/45589/1/AHMAD%20ASARI%20SULAIMAN_HJ.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik & Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TK1-9971 Electrical engineering Electronics Nuclear engineering
spellingShingle	TK1-9971 Electrical engineering Electronics Nuclear engineering Sulaiman, Ahmad Asari Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
description	Bandpass filters perform an important filtering task in a radio transceiver. The narrow stopbands and low gradient in transition bands of conventional parallel-coupled or electromagnetic band gap (EBG) are two (2) of the challenges in designing a bandpass filter. This thesis will introduce three (3) structures of bandpass filter. The first is a new combination of parallel-coupled and defected ground structure (DGS) that operates at a center frequency of 7.8 GHz for mobile satellite application. In essence, this combination structure has resulted to high Q-factor and slow wave which contributes to a high slope and spurious suppression. Cylindrical dielectric resonators were also applied to the circuit in order to increase the return loss in the passband or to enhance the bandwidth of the design. The Zirconate Tin Titanate, ZrSnTiO3 (  r = 37.4, tangent loss = 0.002) dielectric resonator and RO3003 substrate with dielectric constant and tangent loss of 3.0 and 0.0013 respectively were applied in this project. The overall dimension of the circuit was 47.2 mm × 19.16 mm, while the size of the rectangular DGS was 1 mm × 7.36 mm. The second structure is a combination of end-coupled and split ring resonators in a multilayer configuration that operate at 3.47 - 3.79 GHz for Worldwide Interoperability for Microwave Access (WiMAX) application. A modified split ring was introduced to obtain the additional sub-resonators from the magnetic coupled between vertical layers in order to increase the coupling effect from the multilayer structure. The Flame Retardant 4 (FR-4) substrate with dielectric constant, r of 4.6 was used as a core material.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Sulaiman, Ahmad Asari
author_facet	Sulaiman, Ahmad Asari
author_sort	Sulaiman, Ahmad Asari
title	Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
title_short	Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
title_full	Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
title_fullStr	Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
title_full_unstemmed	Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters
title_sort	development of microwave bandpass filter using defected ground structure in comparison with multilayer and dielectric resonator filters
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik & Elektronik
publishDate	2012
url	http://eprints.usm.my/45589/1/AHMAD%20ASARI%20SULAIMAN_HJ.pdf
_version_	1747821533800169472

Development Of Microwave Bandpass Filter Using Defected Ground Structure In Comparison With Multilayer And Dielectric Resonator Filters

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