RF & Microwave Electronics - October 2025
Critical advantages and challenges of using laser communications in space…the future of EMI protection for military aircraft…new "micro comb" chips promise to improve GPS accuracy. Read about these and other developments in this compendium of articles from the editors of Aerospace & Defense Technology magazine.
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Overview
The document is a special report from October 2025 focusing on advancements in RF and microwave electronics, particularly in the context of defense applications. It highlights the development of space-based laser communications technology by the Department of Defense (DoD) through the Space Development Agency (SDA). This initiative is part of the Proliferated Warfighter Space Architecture (PWSA), which aims to deploy a constellation of 300-500 satellites in low Earth orbit (LEO) to enhance capabilities for missile warning and data transport.
The report emphasizes the potential benefits of laser communications over traditional radio frequency methods, particularly in terms of speed and efficiency in data transmission. The total projected cost for the PWSA is nearly $35 billion through fiscal year 2029. The Government Accountability Office (GAO) conducted a study to assess the SDA's efforts in developing these capabilities, focusing on whether the agency is adhering to leading product development practices.
GAO's findings indicate that the SDA is at risk of investing in new projects without having fully realized the capabilities of existing designs. The report outlines four key recommendations for the Secretary of the Air Force to ensure that the SDA demonstrates a minimum viable product for laser communications before proceeding with further investments and satellite launches. These recommendations include linking the demonstration of capabilities to the various tranches of the PWSA and ensuring that lessons learned are documented and communicated to stakeholders.
Additionally, the report discusses the importance of integrating advanced technologies in defense communications, such as the use of microcomb chips to improve GPS accuracy and the need for innovative EMI shielding solutions that are lightweight and flexible. The document also touches on the challenges faced in the design and implementation of phased array radar systems, emphasizing the critical role of stable components and coaxial cable innovations.
Overall, the report serves as a comprehensive overview of the current state and future directions of RF and microwave electronics in defense, highlighting the significance of laser communications technology and the strategic planning required to ensure successful implementation.
