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A broad band circularly polarized cross slot cavity back array antenna with sequentially rotated feed network for improving gain in X-band application

Published online by Cambridge University Press:  23 May 2016

Majid- Fakheri
Affiliation:
Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Mohammad Naser-Moghadasi*
Affiliation:
Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Ramezan Ali- Sadeghzadeh
Affiliation:
Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran
*
Corresponding author:M. Naser-Moghadasi Email: mn.moghaddasi@srbiau.ac.ir

Abstract

This paper presents a new broad band circularly polarized slot antenna array based on substrate-integrated waveguide (SIW) and aperture feeding techniques. The antenna element's impedance and 3 dB axial-ratio (AR) bandwidths are from 8.8 to 10.4 GHz (16.67%) and 9.5–10.7 GHz (12%), respectively. Employing aperture-coupled feed and combining this method with sequentially rotated network, a 2 × 2 antenna array is achieved. Parametric optimization procedure is used to enhance the antenna specifications. In the presented scheme by reducing mutual coupling caused by the SIW technique and sequentially rotated feed network, all parameters of antenna are improved. Consequently a novel antenna array with impedance bandwidth of 2.8 GHz (8.7–11.5 GHz) and 3 dB AR bandwidth of 2.1 GHz (9–11.05 GHz) are obtained. The average gain of the proposed antenna is about 16.7 dBic. A new method is used to increase the gain of antenna array. The extracted result shows that side lob level, mutual coupling, impedance bandwidth, and performance of antenna simultaneously are controlled.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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A broad band circularly polarized cross slot cavity back array antenna with sequentially rotated feed network for improving gain in X-band application
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