Research Projects

Traditional spiral antennas offer frequency-independent behaviour and circular polarization over wide frequency ranges but are typically limited to single polarization either RHCP or LHCP and face challenges in dual-polarized or reconfigurable systems. The proposed Dual Polarized Ambidextrous Aperture Spiral Antennas using Substrate Integrated Suspended Line technology address these limitations by integrating dual circular polarization RHCP and LHCP in a single aperture, leveraging SISL's low loss, high-performance platform for enhanced bandwidth, efficiency, and isolation. Objectives 1. To design and develop a compact spiral antenna structure supporting dual circular polarization RHCP and LHCP. Frequency ranges from 2 GHz to 18 GHz challenging in single design 2. To integrate the antenna within the SISL platform to enhance bandwidth, efficiency, and isolation. 3. To achieve ambidextrous circular polarisation in a single antenna structure to support dynamic polarization switching or dual-mode operation. 4. To demonstrate the antenna’s suitability through simulation, prototype fabrication, and experimental measurements. Hypothesis: The integration of a dual-polarized spiral antenna with ambidextrous circular polarization RHCP and LHCP into a SISL platform will overcome the limitations of conventional spiral antennas, such as single polarization and high radiation losses. Designing the antenna with RHCP and LHCP in single platform is very challenging. Using SISL's design with air cavities and low-loss features, the new DP-AMSA will provide very wide frequency coverage 2 to18 GHz very challenging, high efficiency, and strong separation between ports batter than 25 dB, all while keeping a small, flat shape that works well with modern multilayer PCBs. Methodology: The mainly we will design and simulate the spiral antenna with circularly polarization RHCP and LHCP. After that, simulate the structure for both the polarization at single substrate (means in single design). For doing this we will use the CMA technique to optimized the structure, and to get the proper radiation pattern. Then similar structure will be optimized in the SISL technology to improve the bandwidth and other merit of the SISL technology. The proposed DP-AMSA using SISL technology offers significant advancements in antenna design with high impacts: • Enhanced Performance: The antenna’s ability to support dual circular polarization and operate over a wide frequency range improves signal reliability and supports diverse communication standards, making it ideal for EW, radar, satellite communications, and IoT applications. • Compact and Lightweight: Antenna in SISL technology ensures a low-loss, quasi-planar structure, enabling deployment in space-constrained platforms such as UAVs, automotive radar, and portable devices. • Cross-Domain Applications: The antenna’s versatility supports critical sectors, including defence anti jamming systems, aerospace, medical imaging, RFID, and 5G, 6G communications. • Strategic and Economic Impact: The project aligns with India’s Atmanirbhar Bharat and Make in India initiatives by fostering indigenous RF and microwave technologies. Outcomes will be shared with DRDO, ISRO, and defence industries like BEL and Astra Microwave, with potential for patent filing and licensing to startups under iDEX and TDF schemes. Civilian applications, such as rural broadband and disaster-resilient networks, further enhance its socio-economic benefits. • Research Potential: The project enables exploration of reconfigurable, AI-optimized antenna systems, contributing to academic-industry collaboration and skilled manpower development in advanced wireless technologies. This proposal positions the DP AMSA as a high-impact, innovative solution for next-generation communication and defence systems, addressing critical challenges in size, performance, and polarization control.