Measurements of the absolute power of high-power millimeter/THz wave generators have been considered to be highly variable and to occasionally produce faulty results owing to experimental difficulty. In this study, we propose a calibration-free method for real-time power measurement of an electron cyclotron maser system, a so-called gyrotron. We demonstrate the feasibility of the method by using a recently developed W-band gyrotron with a peak power of tens of kilowatts. The technique is based on transmitter antenna power measurement by using the Friis transmission equation with a defined gyrotron antenna gain. The new technique will allow extremely simple and accurate real-time measurement of output power over a wide dynamic range (> 50 dB) for continuous wave sources to high-power millimeter/THz wave sources with nanosecond pulse lengths.
CITATION STYLE
Kim, S. G., Kim, J. H., Kim, D., Won, J. H., Lee, W. S., Yang, J., & Choi, E. (2015). Direct Real-Time Power Measurement of a High-Power Electron Cyclotron Maser by a Simple One-Point Schottky Detector Signal. IEEE Transactions on Terahertz Science and Technology, 5(5), 779–785. https://doi.org/10.1109/TTHZ.2015.2462027
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