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ABSTRACT
The proposed microstrip bandpass filters in this paper have compact sizes and narrow band responses which are the requirements of modern wireless communication circuits. These filters are constructed from dual-edge coupled resonators; each resonator is based on applying step impedance resonator generator on first and second iteration of Hilbert fractal resonators on each segment of each iteration level. They have been designed for the industrial, scientific, and medical band (ISM) band applications at a centre frequency of 2.4 GHz using a substrate with a dielectric coefficient of 9.6 and thickness of 0.508 mm. The performance of bandpass filters has been analysed using a method of moments (MoM) based on software package, Microwave Office 2009, from Advanced Wave Research Inc., which is widely adopted in microwave research and industry. Simulation responses show that these filters possess good frequency response characteristics with second harmonics suppression. Moreover, these filters showed noticeable miniaturization which is an important feature for many communication applications. The simulated and measured results are in good agreement.
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Notes on contributors
Yaqeen S. Mezaal
Yaqeen S. Mezaal was born in Baghdad, Iraq, in 1985. He received his BSc degree in electronic and communication engineering from University of Technology, Baghdad, Iraq in 2007, and his MSc degree from the same university in 2009. He is currently a PhD researcher of electronic and communication engineering at Cankaya University, Ankara, Turkey. He has more than 12 papers in international and local conferences and peer-reviewed journals. His research interests include wireless communication and microwave circuits design. Mr Yaqeen has good experience in engineering software relating to the electronic and communication applications such as Matlab, Microwave Office, from Advanced Wave Research Inc., and Sonnet Software Inc. He is a member of IEEE.
Halil T. Eyyuboğlu
Halil Tanyer Eyyuboğlu received his BSc from Birmingham University, UK in 1976, and his MSc and PhD from Loughborough University, UK in 1977 and 1982, respectively. For 16 years, he served in Turkish PTT, finally becoming the director of Research and Development. In the meantime, he also lectured at Anadolu and Hacettepe Universities. For the years 1999–2001, he was the Ankara Regional Manager of TELSIM, the second largest GSM operating company of Turkey. Since 2002 he has been at the Electronic and Communication Engineering Department of Cankaya University. His main area of research is free space optical communication. The others are CDMA and music.
Jawad K. Ali
Jawad K. Ali was born in Baghdad, Iraq in November of 1956. He received his BSc and MSc degrees in 1979 and 1986, respectively, from Al-Rasheed College for Science and Technology, Iraq. From 1989 to 1991, he joined a PhD study programme at the Faculty of Engineering, Antonin Zapotocky Academy (VAAZ), Brno, former Czechoslovakia. Since 2010, he has been a professor at the University of Technology, Iraq. Currently, he is the deputy dean for postgraduate studies and scientific affairs at the Department of Electrical Engineering. His fields of interests include microwave antenna miniaturization and design, and passive microwave circuits design. He had more than 80 papers published in local and international conferences and peer-reviewed journals. Prof Ali is a Senior Member of IEEE and a Member of IET.