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ABSTRACT
In this paper, a novel broad band circularly polarized (CP) array antenna by modified feed network is presented. Non-using quarter wavelength transformer and focusing of feed network in centre section of array are advantages of this antenna. Moreover, employing ultra-wide band CP multi segment circular fractal structure, according to the benefits of fractals, causes to create innovation at proposed CP array antenna. Acceptable agreement between the simulation and measured results validates the proposed design. The 3-dB axial ratio of the array extends to approximately 2.3 GHz with an impedance bandwidth of 41%. The proposed array was designed to operate over the frequency range between 3.99 and 7.89 GHz corresponding to an impedance bandwidth of 65.54% for VSWR < 2 (1.98:1).
ACKNOWLEDGEMENTS
The authors would like to thank Ofogh Tech. Co. for measuring and manufacturing of antenna. And special thanks to Prof. Bal. S. Virdee for helping to design antenna.
DISCLOSURE STATEMENT
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Puria Bairami
Puria Bairami received an MS degree in electrical engineering from the University of Islamic Azad University of Urmia, Iran. He now holds a research chair at the Ofogh Tech. Institute. His main research interests are design and optimization of microwave and antenna propagation.
E-mail: [email protected]
Majid Fakheri
Mir. Majid Fakheri was born in Urmia, Iran, in 1984. He received the BSc degree in telecommunication engineering from IAU University, Urmia, Iran, in 2006, and MSc degree from Urmia University, Iran, in 2010. Since 2010, he is with IAU University working with Telecommunications Department at Faculty of Electrical and Computer Engineering. He is a PhD student in telecommunication engineering in SRBIAU University since 2011. His current interests are numerical techniques in electromagnetic, antenna, propagation, neural network, pattern recognition, Image processing, substrate integrated waveguide (SIW), and array antenna.
E-mail: [email protected]
Vahid Rafii
Vahid Rafiei was born in Naghadeh, Iran, in 1986. He is an author and a co-author of more than a dozen articles about CP array and beam steering antenna. He is selected as top Iranian young research in 2014–2016. Now, he is working with advance electromagnetics, microwave and antenna research group at Istanbul Aydin University and also at the same time is a faculty member of Istanbul Aydin University. His main areas of interest in research are microstrip array antenna, beam steering and beam shaping feed networks, computational methods, microwave passive and active circuits, graphene-based nano structure microwave and antenna application, and RF MEMS.
E-mail: [email protected]
Loghman Asadpor
Loghman Asadpor was born on 8 August 1984 in Urmia, IR Iran. He received his BS degree in 2010 from the Department of Electrical Engineering and PhD degree in 2015 in Science and Research Branch from Islamic Azad University, Tehran-Iran. His research includes antenna design, and microwave instrumentation and measurement.
E-mail: L. [email protected]