Design, fabrication and measurement dual band microstrip bandpass filter using landa/4 short circuit stub intergrated with defected microstrip structure (DMS)

Mohd Yusof, Maryam Jameelah (2016) Design, fabrication and measurement dual band microstrip bandpass filter using landa/4 short circuit stub intergrated with defected microstrip structure (DMS). Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Microwave system have been using in a wide difference range of application for the society including satellite television, mobile phone and military satellite system. The daily demand growth in communication system like satellite and mobile phone has encourage researcher towards compact, small size and low-cost in design of filter. In order to achieve the objective, microwave circuits are design in compact size and multi-band. This thesis present the dual-band microstrip bandpass filter using h0\4 short-circuited stubs integrated with Defected Microstrip Structure (DMS) to achieve compact size and multi-band filter. The method proposed in this project is synthesis technique to produce an inverter couple Chebyshev lowpass prototype network that can be tranformed into the bandpass filter. The dual-band structure is added by integrating the bandpass with DMS to produce a bandstop and bandpass response simultaneously. Bandpass filter is designed based upon hg0/4 short-circuited stubs structure of 5th degree. The structure T-shaped has been proposed in this project, DMS is chosen because of good frequency selectivity, low loss and simple circuit topology. The design simulated by using FR4 with a dielectric constant, Et and a thickness of 1.6 mm. In this project, Advance Design System (ADS) has been used as the software tool to design the filter of Dual band band-pass filter. The dual-band filter response is at 2.475 GHz and 5.104 GHz with return loss, S11 better than -15dB and insertion loss, S21, of around -1 dB respectively. While, the DMS exhibit bandstop response better -20dB at cutoff frequency 3.335 GHz. The significant contribution of this research is that the filter can be implemented in any transceiver system where demand for handling multiple separated frequency in a single device such as GSM and WLAN.

Item Type:Thesis (Masters)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
ID Code:8785
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:25 Jan 2017 08:14
Last Modified:25 Jan 2017 08:14

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