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MIT’s Compact Terahertz Receiver Extends IoT Battery Life

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Researchers from MIT have developed a novel wake-up receiver that utilizes terahertz waves, resulting in a device that is over ten times smaller than traditional receivers and consumes a mere few microwatts of power. This innovative receiver incorporates a built-in authentication system to enhance security, protecting against attacks that could drain battery life. Designed for IoT applications, the receiver is crucial for tiny sensors and microrobots, which often have non-replaceable batteries. The device is less than 1.54 square millimeters and employs a mix of two antennas to maximize performance while facilitating effective communication over distances of 5 to 10 meters.

Unlike conventional receivers that require significant power for frequency modulation, the MIT team developed a zero-power detector capable of sensing terahertz signals without needing such processes. Furthermore, the addition of lightweight cryptography for dynamic token generation addresses vulnerabilities to denial-of-sleep attacks. Future work will focus on enhancing signal strength stability as the receiver moves and exploring further real-world applications. This advancement complements a broader technology framework aimed at improving energy efficiency and functionality in miniaturized sensing and authentication platforms, marking a significant step forward in IoT device capability.

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