A novel dual-loop ground-radiation antenna for circularly polarized GNSS applications

Abstract

In this investigation, a circularly polarized (CP) dual-loop ground-radiation antenna has been proposed for GPS applications using a transverse loop and a longitudinal loop. The transverse loop is designed within an 8 mm × 4.5 mm (0.042λ × 0.024λ) clearance, installed at the horizontal edge of the ground plane for excitation of the ground mode along the y-axis, whereas a 1 mm × 10 mm (0.005λ × 0.053λ) longitudinal loop is etched at the vertical edge of the ground plane for excitation of the ground mode along the x-axis. In this way, the magnitudes and phases of the orthogonal components of the radiated electric field have been controlled independently, satisfying the CP conditions. The proposed antenna produced right-hand circular polarization towards the + z-axis, which has been verified using rectangular and square-shaped ground planes. Both simulation and measurement were conducted, and the measured axial ratio bandwidth with reference to 3 dB was 20 MHz (1.27%) while the impedance bandwidth with reference to −6 dB was 141 MHz (8.95%).

KEYWORDS:

• Circular polarization
• dual-loop ground-radiation antenna
• ground mode

Disclosure statement

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

Additional information

Funding

This work was supported by China Scholarship Council.

Notes on contributors

Zeeshan Zahid

Zeeshan Zahid received his PhD from Hanyang University, South Korea in 2018. He is currently serving as Associate Professor in the Department of Electrical Engineering, College of Signals, National University of Sciences and Technology, Pakistan. He has taught various courses such as Electromagnetics, Antennas, Microwave Engineering, and Electronic Circuit design. He is the recipient of The Best Teacher Award in 2012. His research interests include high efficiency antenna design for mobile devices, circularly polarized antennas, and Massive MIMO for 5G smartphones. He is an active researcher and has contributed a number of research papers, published in reputed journals. He is a senior member of IEEE and a member of IEEE antennas and propagation society (AP-S). He also serves as a technical reviewer of reputed international journals.

Longyue Qu

Longyue Qu received the B.S. degree in electronic engineering from Yanbian University, China, in 2013, and the M.S. and Ph.D. degrees in electromagnetics and microwave engineering from the Hanyang University, Seoul, Rep. of Korea, in 2015 and 2018, respectively. He was a post-doctoral researcher at Hanyang University from Sept. 2018 to Aug. 2019 and then was promoted as an Assistant Research Professor. From 2019 to 2022, he was a co-founder and CTO of Hanyang Antenna Design Co. Ltd, Shenzhen, China. Since 2022, he has been an Assistant Professor with the School of Electronics and Information Engineering, Harbin Institute of Technology, Shenzhen, China. He is the author of more than 40 articles, and more than 30 inventions. He serves as a reviewer for several international journals and conferences. He also serves as an Editorial Board Member in the International Journal of Sensors, Wireless Communications and Control. His current research interests include antenna theory and design, metamaterial-based antenna technology, millimeter-wave arrays, and RF circuits. Dr. Qu was a recipient of the Korean Government Scholarship Award and China Scholarship Council (CSC). His research is listed in the Top 100 National R&D Excellence Award in 2015.