Radiation Pattern Synthesis and Mutual Coupling Compensation in Spherical Conformal Array Antennas

Authors

  • Taimur Ahmed Khan Department of Electrical Engineering University of Engineering and Technology Peshawar, Pakistan
  • Muhammad Irfan Khattak Department of Electrical Engineering University of Engineering and Technology Peshawar, Pakistan
  • Adnan Tariq Department of Electrical and Computer Engineering CUI Abbottabad Campus Abbottabad, Pakistan

Keywords:

Conformal array antenna, least square optimization, mutual coupling compensation, radiation pattern correction

Abstract

This paper presents a novel technique based on Hybrid Spatial Distance Reduction Algorithm (HSDRA), to compensate the effects of deformity and mutual coupling occurred due to surface change in conformal arrays. This antenna surface deformation shifts the position of null points and loss of the main beam resulting in reduced antenna gain along with substantial undesirable effects on the antenna performance. The proposed algorithm, which cumulatively incorporates the Linearly Constraint Least Square Optimization (LCLSO) and Quadratically Constraint Least Square Optimization (QCLSO) techniques, is formulated to minimize/reduce the absolute distance between the actual (simulated/measured) radiation pattern and the desired radiation pattern while keeping the direction of mainbeam and nulls position under control. In particular, a 4x4 conformal microstrip phased array from planar surface is deformed to prescribe spherical-shape surface with various radii of curvature, is validated. For the enhancement of Gain of the conformal array antenna, Gain Maximization Algorithm is also proposed, the simulated results of which is compared to the traditional Phase compensation technique and unconstraint least squares optimization. The analytical results for both planar and spherical deformed configurations are first evaluated in MATLAB and then validated through Computer Simulation Technology (CST).

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Author Biographies

Taimur Ahmed Khan, Department of Electrical Engineering University of Engineering and Technology Peshawar, Pakistan

Taimur Ahmed Khan received the B.Sc. degree in Electrical Engineering from CECOS University of IT and Emerging Sciences, Peshawar in 2011, and the M.Sc. Electrical Engineering from UET Peshawar, in 2017. Currently he is doing Ph.D. in Electrical Engineering from UET Peshawar under the supervision of Associate Professor Dr. Muhammad Irfan Khattak. He is currently working as a Lab Engineer in RF and Microwave Lab in the Department of Electrical Engineering at University of Science and Technology Bannu, where he teaches various electrical engineering subjects and perform labs to undergraduate engineering students.

Muhammad Irfan Khattak, Department of Electrical Engineering University of Engineering and Technology Peshawar, Pakistan

Muhammad Irfan Khattak received the B.Sc. degree in Electrical Engineering from the UET, Peshawar, in 2004, and the Ph.D. degree from Loughborough University, U.K., in 2010. After doing his Ph.D. degree, he was appointed as the Chairman of the Electrical Engineering Department, UET Peshawar Bannu Campus, for five years and took care of the academic and research activities at the department. Later in 2016, he was appointed as the Campus Coordinator of UET Peshawar Kohat Campus and took the administrative control of the campus. He is currently working as an Associate Professor with the Department of Electrical Engineering, UET, Peshawar. He is also heading the research group Microwave and Antenna Research Group, where he is also supervising the postgraduate students working on latest trends in antenna technology like 5G and graphene nano-antennas for terahertz, optoelectronic, and plasmonic applications etc. His research interests include antenna design, on-body communications, anechoic chamber characterization, speech processing, and speech enhancement.

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Published

2021-11-04

How to Cite

[1]
T. A. . Khan, M. I. . Khattak, and A. . Tariq, “Radiation Pattern Synthesis and Mutual Coupling Compensation in Spherical Conformal Array Antennas”, ACES Journal, vol. 36, no. 06, pp. 707–717, Nov. 2021.

Issue

2021: Vol 36 Iss 6

Section

Articles