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ABSTRACT
In this paper, a high-gain miniaturized microstrip patch antenna was designed using engineered magnetic materials as both substrate and superstrate. The proposed antenna was numerically analyzed, fabricated, and measured. To obtain high permeability and permittivity, an engineered magnetic material with Electric-LC Resonators in the superstrate layer and 2nd kind Hilbert fractals in the substrate were used. Equivalent material parameters technique was also used for efficient simulation of metamaterials in the substrate and the superstrate. The simulation and measurement results show a gain improvement of 8.1 dB, and a miniaturization factor of 4.8 for the miniaturized antenna at 534 MHz. Additionally, using superstrate causes to reduce antenna size to 170 × 170 × 37 mm3 and patch size less than λ/100 resonance frequency.
ACKNOWLEDGMENTS
The authors of this paper would like to acknowledge Dr Leila Yousefi, a professor at the University of Tehran for their very generous consults and technical support of this work.
DISCLOSURE STATEMENT
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
A. Bakhtiari
A. Bakhtiari was born in Miyaneh, Iran, in 1975. He received MSc degree in electrical engineering from Islamic Azad University South Tehran Branch, Tehran, Iran, in 2002. He is a PhD student at Science and Research Branch, Islamic Azad University, Tehran-Iran. Currently, he is a Faculty of Engineering, Takestan Branch, Islamic Azad University, Takestan-Iran. His research interests include metamaterials, miniaturized antennas, electromagnetic, EMC/EMI, and Photonics.
E-mail: [email protected]
R. A. Sadeghzadeh
R. A. Sadeghzadeh received the BSc degree in telecommunication engineering from K. N. Toosi University of Technology, Tehran, Iran, in 1984, the MSc degree in digital communication engineering from the University of Bradford, Bradford, UK, and University of Manchester Institute of Science and Technology (UMIST), Manchester, UK, as a joint program in 1987, and the PhD degree in electromagnetic and antenna from the University of Bradford in 1991. During 1992–1997, he worked as a postdoctoral research assistant in the field of propagation, electromagnetic, antenna, biomedical, and wireless communication with the University of Bradford. From 1984 to 1985, he was with Iran Telecommunication Company, Tehran, Iran, working on networking. Since 1997, he has been with the Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology. He has published more than 120 referable papers in international journals and conferences. His research interests include numerical techniques in electromagnetics, antenna, propagation, radio networks, wireless communications, Nano antennas, and radar systems.
E-mail: [email protected]
M. Naser. Moghadasi
M. Naser. Moghadasi was born in Saveh, Iran, in 1959. He received the BSc degree in communication engineering in 1985 from the Leeds Metropolitan University (formerly Leeds polytechnic), UK. Between 1985 and 1987, he worked as an RF design engineer for the 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 degree studying in CAD of microwave circuits. He received his PhD degree in 1993, from the University of Bradford, UK. He was offered then a two years Post Doc. To pursue research on microwave cooking of materials at the University of Nottingham, UK. From 1995, Dr Naser-Moghadasi joined Islamic Azad University, Science & Research Branch, Iran, where he currently is an associate professor and head of postgraduate studies. His main areas of interest in research are microstrip antenna, microwave passive and active circuits, and RF MEMS. Dr Naser-Moghadasi is a member of the Institution of Engineering and Technology, MIET and the Institute of Electronics, Information and Communication Engineers (IEICE). He has so far published over 140 papers in different journals and conferences.
Corresponding author. E-mail: [email protected]