Microwave Power Sensing Technologies and Applications
Summary
Microwave power sensing encompasses a suite of techniques and devices designed to measure the magnitude and distribution of electromagnetic energy in the GHz frequency range. Core approaches include diode detection, thermoelectric conversion and calorimetric measurement, each offering different trade-offs in bandwidth, linearity, sensitivity and dynamic range. Advances in micro-electro-mechanical systems (MEMS) and monolithic microwave integrated circuit (MMIC) technologies have enabled compact, high-precision sensors that span from sub-gigahertz frequencies up to millimetre-wave bands. Applications range from 5G communications and radar calibration to phase-shift detection and on-chip power monitoring. Recent work has focused on extending operational bandwidth to cover emerging communications bands, improving thermal-flow architectures for enhanced sensitivity and incorporating self-calibration functions to ensure long-term measurement fidelity. These developments carry global significance for network deployment, industrial sensing and scientific instrumentation by delivering compact, high-performance power meters compatible with modern microwave systems.
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Microwave Power Sensing Technologies and Applications publication trend
The graph below shows the total number of articles in microwave power sensing technologies and applications across all publications each year (not limited to Nature Index journals).
Technical terms
Microwave power sensor: Device that converts incident microwave energy into an electrical signal proportional to power level.
Thermoelectric conversion: Process by which temperature differences generated by absorbed microwave power are transformed into a measurable voltage.
MEMS: Micro-electro-mechanical systems integrating mechanical structures and electronic circuits at the microscale for sensing and actuation.
Sensitivity: Ratio of output voltage to input power, indicating the smallest detectable signal change per unit of power.
Dynamic range: Span between the minimum and maximum input power levels over which a sensor maintains specified accuracy.
References
- Design of a Microwave Power Detection System in the 5G-Communication Frequency Band. Sensors (2021).
- DC-25 GHz and Low-Loss MEMS Thermoelectric Power Sensors with Floating Thermal Slug and Reliable Back Cavity Based on GaAs MMIC Technology. Micromachines (2018).
- A Thermoelectric MEMS Microwave Power Sensor with Inline Self-Detection Function. Micromachines (2022).
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