Electromagnetic modelling of multiband frequency reconfigurable antenna for wireless communications

ABSTRACT

The present work aims to propose a new formulation by combining the moment method and generalized equivalent circuit's method (MOM-GEC) to study the performance of a frequency reconfigurable antenna commanded by a PIN diode(s) as switching component(s). This method makes it possible to reduce the 3D problems to an alleviate calculation in the discontinuity plane using the admittance operators. The antenna structure is excited by a localized voltage source and the PIN diode is introduced in the mathematical formulation by a surface impedance model. A parametric study is made to achieve a good approximation of PIN diodes longitudinal dimension ensuring the switch operation. Then we focus on the analysis of reconfigurable antennas controlled by one and two PIN diodes. The simulation results are in good agreement with those obtained by software simulation and they show that it is possible to shift the resonant frequency depending on the PIN diode state.

KEYWORDS:

• MoM-GEC method
• PIN diode
• wireless communications
• reconfigurable antenna

ORCID

M. Aidi http://orcid.org/0000-0002-9008-3238

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Notes on contributors

H. Helali

H. Helali received a Master’s degree in Fundamental Physics and an MSc degree in Condensed matter physics from the Faculty of Mathematical, Physical and Natural Sciences of Tunis (FST). He is a PhD student in Telecommunications at the National Engineering School of Tunis. His research interests focus on the reconfigurable antennas structures using MoM-GEC method for microwave and antenna applications.

M. Aidi

M. Aidi is currently an associate professor at Gabes University. He received a Master degree in Applied Physics from Higher School of Sciences and Techniques of Tunis and an MSc degree in energetic physics from National Institute of Applied Science and Technology (INSAT). In 2011, he earned his PhD in Telecommunications from the National Engineering School of Tunis. His research interests include electromagnetic modelling of the nano-devices based on carbon nanotubes and graphene layers for telecommunication applications.

T. Aguili

T. Aguili is currently Professor at the National Engineering School of Tunis (ENIT), Tunis El Manar University. He is also the director of Communications Systems Laboratory (Syscom) and he is responsible for research and master’s degree in the communications and information’s technology Department. His research interests include modelling of microwave systems and nano-devices, numerical methods in electromagnetics, electromagnetic wave phenomena in layered media, integrated transmission lines, waveguides and antennas, and leaky-wave phenomena.