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2. Master Thesis / Tesis Master
3. Institute of Climate Change / Institut Perubahan Iklim

Title:	Development of a metamaterial based bandpass filter for quad band applications
Authors:	Md. Jubaer Alam (P85933)
Supervisor:	Mohammad Rashed Iqbal Faruque, Dr.
Keywords:	Metamaterials Electromagnetism Electromagnetic devices Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	20-Jul-2018
Description:	In today's modern communication system, cost effective, concise, and low-loss circuit design is in trend. However, it triggers the interferences of the overall system. The implementation of artificially engineered metamaterial have drawn improbable interest in the scientific community due to their fascinating electromagnetic properties. The conventional bandpass filters are not suitable for embedding in portable devices due to their large perpendicular ground plane, low efficiency, and portable interferences, which poses a challenge for designing compact metamaterial inspired bandpass filter. This thesis concentrates on the design, development and prototyping of metamaterial-based bandpass filters for GPS, WLAN and WiMAX applications that achieve compactness, sufficient bandwidth, stable effective parameters and good time domain performances. Dual mode mixed open loop resonator (OLR)-based metamaterial structures are introduced for the design of triple-passband filters. The structures are embedded into a 50-Ω microstrip framework. The Rogers RT- 5880, which has a compact structure, is used as the substrate in each of the proposed passband filter designs, where the attainment of the structures are explored both theoretically and experimentally. Finite integration Technique (FIT) based electromagnetic simulator was adopted for the designs and analyses of the resonator based filters. The metamaterial characteristics were evaluated using the Nicolson-Ross-Weir method at the filtering frequency. A partial ground system is applied in the ground layer and stepwise analysis is performed on the proposed resonator, which can pursue the fundamental even-mode resonant frequency. For the proposed resonator, two bandpass filters named as stub-centred triple split ring resonator (STSRR) and triple split ring resonator (TSRR) are designed and fabricated to justify the perception, focusing on GPS, WLAN, IOT and WiMAX applications. The prototype STSRR operates at 1.5 GHz (1.46 to 1.55 GHz), 2.45 GHz (2.43 to 2.47 GHz) and 3.65 GHz (3.63 to 3.66 GHz). The other prototype TSRR with more parasitic strips structure operates at 1.55 GHz (1.47 to 1.55 GHz), 2.70 GHz (2.67 to 2.71 GHz) and 3.65 GHz (3.63 to 3.67 GHz), respectively. The effective electromagnetic parameters for both the prototypes are retrieved from the simulation of the scattering parameters imply that the OLR metamaterial filters exhibit negative refraction bands. With favourable designs and double-negative characteristics, the structures TSRR and STSRR are suitable for novel triple bandpass filters, particularly covered by GPS, WLAN, IOT and WiMAX respectively.,Master
Pages:	83
Call Number:	TK7871.15.M48A433 2018 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Institute of Climate Change / Institut Perubahan Iklim

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