Performance Analysis of Linearly Arranged Concentric Circular Antenna Array with Low Sidelobe Level and Beamwidth Using Robust Tapering Technique
Imteaz Rahaman,
Md Ashraful Haque,
Narinderjit Singh Sawaran Singh,
Md. Shakiul Jafor,
Pallab Kumar Sarkar,
Md Afzalur Rahman,
Mohd Azman Zakariya,
Ghulam E. Mustafa Abro,
Nayan Sarker
Affiliations
Imteaz Rahaman
Electrical Engineering, Ingram School of Engineering, Texas State University, San Marcos, TX 78666, USA
Md Ashraful Haque
Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
Narinderjit Singh Sawaran Singh
Faculty of Data Science and Information Technology (FDSIT), INTI International University, Per-Siaran Perdana BBN, Putra Nilai, Nilai 71800, Negeri Sembilan, Malaysia
Md. Shakiul Jafor
Department of Electrical and Electronic Engineering, Rajshahi University of Engineering Technology, Rajshahi 6204, Bangladesh
Pallab Kumar Sarkar
Electrical Engineering, Ingram School of Engineering, Texas State University, San Marcos, TX 78666, USA
Md Afzalur Rahman
Department of Electrical and Electronic Engineering, Daffodil International University, Dhaka 1341, Bangladesh
Mohd Azman Zakariya
Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
Ghulam E. Mustafa Abro
Condition Monitoring Systems Lab, NCRA, Mehran University of Engineering and Technology (MUET), Jamshoro 76020, Pakistan
Nayan Sarker
Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology (KUET), Khulna 9203, Bangladesh
In this research, a novel antenna array named Linearly arranged Concentric Circular Antenna Array (LCCAA) is proposed, concerning lower beamwidth, lower sidelobe level, sharp ability to detect false signals, and impressive SINR performance. The performance of the proposed LCCAA beamformer is compared with geometrically identical existing beamformers using the conventional technique where the LCCAA beamformer shows the lowest beamwidth and sidelobe level (SLL) of 12.50° and −15.17 dB with equal elements accordingly. However, the performance is degraded due to look direction error, for which robust techniques, fixed diagonal loading (FDL), optimal diagonal loading (ODL), and variable diagonal loading (VDL), are applied to all the potential arrays to minimize this problem. Furthermore, the LCCAA beamformer is further simulated to reduce the sidelobe applying tapering techniques where the Hamming window shows the best performance having 17.097 dB less sidelobe level compared to the uniform window. The proposed structure is also analyzed under a robust tapered (VDL-Hamming) method which reduces around 69.92 dB and 48.39 dB more sidelobe level compared to conventional and robust techniques. Analyzing all the performances, it is clear that the proposed LCCAA beamformer is superior and provides the best performance with the proposed robust tapered (VDL-Hamming) technique.
