https://orcid.org/0000-0002-8810-9574
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Abstract
In this paper, a novel method for accurate modeling of microstrip discontinuities based on pulse shaping modulation is presented. The proposed method uses a novel excitation signal to address typical challenges when utilizing conventional TDR using Gaussian pulse excitation. In the first step a Double-Exponential Pulse (DEP) is utilized in a modified TDR system to improve the discontinuity localization precision as it has a sharp rise time. Second, a Linear Frequency Modulated (LFM) signal is used to provide more energy at higher frequencies in contrast with the conventional TDR. Subsequently, a mixed DEP and LFM signals are utilized to combine both advantages: high precision of DEP, and the accuracy of LFM. Simulated results are presented to explore the potential of the proposed method.
Additional information
Notes on contributors
O. Mahdiyar
Omid Mahdiyar was born in 1972 in Iran. He received his BSc degree in electronic engineering from Islamic Azad University, Bushehr Branch, Bushehr, Iran in 1996, and his MSc degree in communication engineering from Najaf Abad Branch, Najaf-Abad, Iran in 1999. He is currently a PhD student at Science and Research Branch, Islamic Azad University, Tehran, Iran. His research interests are UWB microstrip antenna, microwave imaging system, waveform diversity. Email: [email protected]
A. H. Mazinan
Amir Hooshang Mazinan was born in 1969 in Tehran, Iran. He is currently an assistant professor at Department of Electrical Engineering, Islamic Azad University (IAU), South Tehran Branch, Tehran, Iran. In 2009 he is received his PhD in control systems engineering. His research interests are intelligent systems (soft computing, fuzzy logic, neural network, GA, evolutionary algorithm, etc.), advanced methods in control, multiple modeling, predictive control, time-frequency representation, filter banks, wavelet theory, signal/image/video processing. Corresponding author. Emails: [email protected], [email protected]
M. A. Pourmina
Mohammad Ali Pourmina is associated professor in electrical engineering (Telecommunication)in Science and Research Branch, Islamic Azad University, Tehran, Iran and top professor of this university in 2016. He received his PhD degree in electrical engineering (Telecommunication) at Science and Research Branch, Islamic Azad University, Tehran, Iran, in 1996 and joined this university in 1996. He has been a member of Iran Telecommunication Research Center since 1992. He has performed research in the areas of packet radio networks and digital signal processing systems since 1991. His current research interests include spread-spectrum systems, cellular mobile communications, indoor wireless communications, DSP processors and wireless multimedia networks. Email: [email protected]
M. Naser-Moghaddasi
Mohammad-Naser Moghadasi was born in Saveh, Iran, in 1959. He received his BSc degree in communication engineering in 1985 from Leeds Becket University (formerly Leeds Polytechnic), UK. Between 1985 and 1987, he worked as an RF design engineer for Gigatech company in Newcastle Upon Tyne, UK. From 1987 to 1989, he was awarded a full scholarship by the Leeds educational authority to pursue an MPhil, studying in CAD of microwave circuits. He received his PhD in 1993 from the University of Bradford, UK. He was offered then two years post-doctoral to pursue research on micorwave cooking of martials at University of Nottingham, UK. From 1995 Dr. Naser-Moghaddasi joined Islamic Azad University, Science and Research Branch, Iran, where he currently is a full professor and head of department. His main areas of interest in research are microstrip antenna, microwave passive and active circuits, RF MEMS and electromagnetic capabilities. Dr Naser-Moghadasi is member of the IET, MIET and IEICE. He has so far published over 200 papers in different journals and conferences. Email: [email protected]
