Wide Bandwidth Axial Ratio Circularly Polarized Array Antenna based on External Resonator

Abstract

This study introduces a wide bandwidth and wide axial ratio (AR), circularly polarised (CP), patch array antenna. By combining dual layers of a polarizer with dual layers of linearly polarized microstrip patch antenna, a novel method is created for generating circular polarization waves with a wide frequency range. The dual-layer 2 × 2 and 2 × 8 microstrip patch array antenna is employed to achieve linearly polarized waves and the external polarizer consists of a 3 × 3 and 3 × 12 four-layer dual rings polarizer that transforms linearly polarized (LP) waves into CP waves. The |S₁₁| −10 dB bandwidth of small and large-scale circular polarized array antennas is 20% and 27.06% at 5 GHz, respectively, Simulations and testing show that the 3-dB axial ratio bandwidth (ARBW) at 5 GHz is 17%. The suggested antenna has a lot of potential for satellite communication applications because of its easy structure, wide ARBW, and wide impedance bandwidth.

KEYWORDS:

• Coaxial probe feed
• Axial-ratio bandwidth (ARBW)
• Polarization conversion
• Patch antenna
• Metamaterial

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Sichuan Science and Technology Program under Grant 2021ZYD0040.

Notes on contributors

Ghulam Fatima Kakepoto

Fatima Ghulam Kakepoto received the BS degree in physics and MS PhD degrees in the field of radio physics from the University of Electronics Science & Technology of China (UESTC), Chengdu, Sichuan. Her research interests included electronics, metamaterials, antenna, and propagation. Currently, she is pursuing a post doctorate from the University of Electronics Science & Technology, Chengdu, Sichuan, China. She presented several research papers at international conferences. Her research work is available on the Web of Science, EI-Village, and IEEE Explorer and published in reputed international journals of EI-Index and SCI (Springer and Elsevier) as well. Email: [email protected]

Xiao-Hua Wang

Xiao-Hua Wang was born in Haian, Jiangsu Province, China, in 1980. He received the BS degree in microwave engineering, MS and PhD degrees in radio physics from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2002, 2005, and 2008, respectively. From March 2008 to February 2009, he was an RF research engineer with Huawei Company, Shanghai, China. From March 2009 to February 2010, he was with the Department of Electronic Engineering, City University of Hong Kong, Hong Kong, as a research staff. Then, he joined UESTC and is currently a professor. His research interests include computational electromagnetics and microwaves. Email: [email protected] components, and antenna.

Farman Ali Mangi

Farman Ali Mangi received PhD in the field of electronic science and technology from the University of Electronics Science & Technology, Chengdu, Sichuan, China. His research interests included electronics, antenna and propagation, and material physics. Currently, he is working as a professor in the Department of Physics & Electronics, Shah Abdul Latif University, Khairpur, Sindh, Pakistan. He received China Scholarship Council (CSC) excellent international student research award for the academic year 2015/2016. He presented enough research papers at international conferences organized in Beijing, Shanghai, Shenzhen, Chengdu, Bangkok, and Phuket. His research work is available on the Web of Science, EI-Village, IEEE Explorer, and published in reputed international journals of EI-Index and SCI (Springer and Elsevier) as well. Corresponding author. Email: [email protected].