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    • The What-Is Series

    The What-Is Series

    The "What is..." series serves as a comprehensive technical encyclopedia designed to demystify complex concepts across the broad spectrum of electronics and engineering. Moving beyond product specifications, this collection delves into the fundamental principles, working mechanisms, and real-world applications of diverse technologies—ranging from sensing methods and communication protocols to emerging hardware innovations. Whether explaining the physics behind a component or comparing different standards, this Wiki provides essential knowledge for developers, students, and engineers seeking to understand the underlying science of technology.
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    What is mmWave?

    This document introduces the fundamentals of millimeter wave (mmWave), including its definition, frequency range, and key propagation characteristics such as path loss, atmospheric attenuation, reflection, and penetration limits. It also outlines the main advantages of mmWave technology and explains the definition, working principles, and typical applications of millimeter wave radar.

    What is LoRa?

    This document introduces the fundamentals of LoRa technology, including its definition, main advantages, and network composition. It also explains key LoRa communication parameters such as data packet structure, spreading factor, coding rate, and signal bandwidth, and briefly discusses the development trends of LoRa and its role in IoT communication.

    What is a LoRaWAN Gateway?

    This document explains the concept of a gateway and introduces the basics of LoRaWAN. It describes the role of a LoRaWAN gateway in IoT networks, how it connects LoRaWAN devices to the Internet, and the basic working process and regional frequency considerations when deploying a LoRaWAN gateway.

    What is a Gas Sensor?

    This document provides a selection guide for gas sensors. It explains what gas sensors are, introduces common classification methods, and describes several gas sensor types with their working principles, pros/cons, and typical applications. The document also includes example sensor recommendations and ends with key considerations for choosing a suitable gas sensor for a specific scenario.

    What is TMR Sensor Technology?

    This document introduces TMR (Tunnel Magnetoresistance) sensor technology, explaining its working principle, structure, and key advantages, and comparing it with other magnetic sensing technologies such as AMR and GMR. It also outlines typical application scenarios of TMR sensors.
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