Ultra-wideband Arrays for Proliferated Satellite Communications

The Space Development Agency (SDA) is working to establish the Proliferated Warfighter Space Architecture (PWSA), a network of optically interconnected satellites operating over Ka-band to enhance global military data connectivity. However, a critical challenge exists in developing an affordable, proliferated network of Ka-band ground stations to support the high data throughput requirements of PWSA. Current ground station systems are costly, and there is a significant gap in available infrastructure, especially in regions unsuitable for optical space-to-ground communication. This project proposes developing a scalable, cost-effective ultra-wideband Ka-band phased array ground station, addressing the SDA’s need for resilient, low-latency communications. The technology will also serve commercial satellite operators moving towards higher frequency bands for advanced payloads. The dual-use nature of this phased array ground station, suitable for both military and commercial applications, offers a compelling business case for development and wide-scale deployment. The proposed solution aims to transform satellite communications by providing robust, scalable infrastructure, reducing operational costs and complexity, and promoting broader commercial adoption. This initiative aligns with the SDA’s objective to integrate innovative commercial technologies, ensuring rapid deployment and operational flexibility for modern space warfare and security. Phase I of this project focuses on several technical objectives. The first objective involves a comprehensive requirements analysis for the Ka-band phased array ground station, engaging with the SDA, mission partners, and commercial entities to define performance benchmarks for data throughput, scan volume, and operational flexibility. The second objective focuses on the optimized design and simulation of Ka-band radiators, identifying and simulating wide-band configurations to support extensive scan volumes without significant RF performance degradation. The third objective includes the analysis and optimization of Wide-Angle Impedance Matching (WAIM) layers, performing computational studies to enhance RF performance at large scan angles and integrating these designs with radiator configurations. The fourth objective is to evaluate the cost-effectiveness and manufacturability of the proposed designs, focusing on materials and manufacturing processes that balance cost, durability, and performance. Finally, the fifth objective involves developing a comprehensive simulation model and detailed documentation for Phase II transition, demonstrating design feasibility and compiling detailed plans for prototype development. By utilizing analytical and computational methods to address specific research questions and document technological advancements, this project aims to develop technology critical for the widespread implementation of Ka-band communications in both government and commercial sectors.