Publication

Abstract : This paper presents a pioneering antenna design, optimized for both space efficiency and exceptional performance in the L-band frequencies utilized by GPS systems. This antenna is built specifically for GAGAN receivers. It works on the vital Ll (1.5754 GHz) and L5 (1.1764 GHz) bands, meaning it can receive both frequencies with just one antenna element. Additionally it exhibits good performance at 1.7 GHz, suggesting potential for future GNSS applications in other frequency bands. This single-feed design makes it compact and efficient. To make sure it catches weak signals well, it uses circular polarization, which is like having a 360-degree net for radio waves. The central component of the design is an annular ring patch antenna, which has a unique construction consisting of two concentric rings made of small strips. When combined with a ground plane cross slot, this design improvement brings about increased gain. This optimized design not only delivers efficient circular polarization in the L-band but also showcases potential for adaptation to future GNSS developments operating in other frequencies, demonstrating its inherent flexibility. Notably, the antenna's compact size, effective dual-band functioning, and ability to produce circular polarisation make it ideal for (GAGAN) receivers operating in the L-band. This versatile design not only excels in the L-band but also holds promise for potential future adaptations to accommodate evolving GNSS requirements in other frequency bands.