Core Viewpoint - The passive Internet of Things (IoT) represents a revolutionary change in the IoT field, utilizing passive tags and sensors for device communication without the need for built-in batteries, resulting in lower costs and flexible deployment [1][2][20]. Industry Overview - Passive IoT operates by harvesting micro-energy from the environment, such as radio waves, thermal energy, and vibrations, to maintain device functionality [1][3]. - The technology has significant implications for logistics tracking, environmental monitoring, and building automation [1][2]. Technological Features - The four main characteristics of passive IoT include micro-energy self-supply, extreme energy efficiency, environmental friendliness, and broad applicability [3]. - The core technologies of passive IoT are environmental energy harvesting, low-power computing, and low-power communication [6][7]. Market Status - The passive IoT market in China is projected to exceed 7 billion yuan in 2024, showing substantial year-on-year growth [20]. - The industry chain of passive IoT exhibits a pyramid structure, with a larger number of upstream hardware companies compared to fewer solution providers and end customers in the mid and downstream segments [8]. Development Background - The global cellular IoT market is experiencing unprecedented growth, with the number of connections expected to reach 3.9 billion in the first half of 2024, a 20% increase year-on-year [10]. - In China, the number of mobile IoT (cellular) terminal users is projected to reach 2.656 billion by the end of 2024, representing a 13.9% year-on-year increase [12]. Policy Support - The Chinese government has been actively supporting the development of passive IoT through various policies, including the promotion of 5G-Advanced (5G-A) technologies and the establishment of international standards [16][18]. - The Ministry of Industry and Information Technology (MIIT) has issued several notifications to encourage the integration of passive IoT into the broader IoT ecosystem [16][18]. Future Trends - The future direction of passive IoT technology will closely rely on the integration and widespread application of 5G and Microwave Dynamic Flight Control (MDFC) technologies [22]. - As technology advances and more application scenarios emerge, the market scale of passive IoT is expected to continue expanding [22].