Broadband, Beam-Steering Asymmetric Stacked Microstrip Phased Array with Enhanced Front-to-Back Ratio

Authors

  • Melih Türk The Scientific and Technological Research Council of Turkey, Gebze, 41470, Kocaeli, Turkey
  • Fikret Tokan Department of Electronics and Communications Engineering, Faculty of Electrical and Electronics Yildiz Technical University, Istanbul, Turkey

Keywords:

Back-lobe suppression, front to back ratio, linear phased array, stacked patch, wideband antenna

Abstract

The backward radiation is a critical problem that may cause breakdown of the front-end circuits that are integrated behind the antenna. Thus, antennas having high Front to Back Ratio (FBR) are required. For phased arrays, the back lobe suppression is required for all scanning angles at all frequencies of the band. In this work, a stacked patch linear array with asymmetric configuration is proposed. It is capable of scanning the beam in ±40º with less than 1.34 dB scanning loss. Due to the usage of probe-fed stacked patches as the antenna elements, impedance matching in 8-10 GHz is achieved. More than 30 dB FBR is obtained for broadside radiation. It is above 20 dB when the beam is steered to θ = 40º. This is valid for all frequencies of the band. A prototype is fabricated and measured. Higher than 38 dB FBR is observed. With its broadband, high FBR and low scanning loss, the proposed asymmetrical stacked patch phased array is suitable as radar and base station antenna.

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Author Biographies

Melih Türk, The Scientific and Technological Research Council of Turkey, Gebze, 41470, Kocaeli, Turkey

Melih Türk was born in Ordu, Turkey. He received his B.Sc. degree in Electronics and Communication Engineering from the Kocaeli University in 2011. He received M.Sc. degree in Electronics and Communication Engineering from the Yıldız Technical University in 2019. He is currently working on his Ph.D. in Communication Engineering at the same university. He has been working in the Scientific and Technological Research Council of Turkey (Tubitak) since 2016. Her research interests include radar systems, phase array antennas and RF circuits.

Fikret Tokan, Department of Electronics and Communications Engineering, Faculty of Electrical and Electronics Yildiz Technical University, Istanbul, Turkey

Fikret Tokan received his Ph.D. degree from Yıldız Technical University, Istanbul, in Communication Engineering in 2010. From October 2011 to October 2012, he was Postdoctoral Researcher in the EEMCS Department of Delft University of Technology. From October 2012 to May 2013, he was a Postdoctoral Fellow at the Institute of Electronics and Telecomm. (IETR), University of Rennes 1, France. Since September 2002, he has been working in the Electromagnetic Fields and Microwave Technique Section of the Electronics and Communications Engineering Department of Yıldız Technical University. He has been currently working as an Assoc. Prof. at that department. His current research interests are UWB antenna design, dielectric lens antennas, reflector systems, electromagnetic waves, propagation, antenna arrays, scattering and numerical methods.

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CST Microwave Studio, http://www.cst.com, CST GmbH, Darmstadt, Germany.

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Published

2021-03-08

How to Cite

[1]
Melih Türk and Fikret Tokan, “Broadband, Beam-Steering Asymmetric Stacked Microstrip Phased Array with Enhanced Front-to-Back Ratio”, ACES Journal, vol. 36, no. 3, pp. 273–281, Mar. 2021.

Issue

2021: Vol 36 Iss 3

Section

General Submission