Normally we measure power of high frequency signal using power sensor which convert the power of signal to power around its DC component then monitored by power meters .
Now , is it valid if we use the system of current probe +digital scope +power module?
Hello Ali,
I think, it is best to get the calibration done for whatever method you adopt and then validate your test results.
When you are involving many individual instruments - as your case is - current probe+ digital scope + power module, you will need to calibrate or atleast provide traceability to some standards for all the instruments.
I do not know what power level you are working with but there are some specialized chips available that can be used for RF power monitoring purposes. I am currently using AD8307 from Analog Devices for
Respected Prof. Julien,
I answered the question keeping in view the usual "routine" research taking place in the academic/university level.
In my view, I can say high frequency to range from about 10kHz to several GHz typically 5-6 GHz. Anything above are the classic microwave frequencies. THz are still the distant galaxies if not near-by-stars especially in the more common academic research! (There are however exceptions of the groups that are directly involved in the THz R& D and application developments.) I am sure, you must be using standard RF T&M instruments like RF synthesizers and Spectrum Analyzers; these are operating at the more commonly used 9kHz-1GHz (or >=3GHz) frequency bandwidth.
The power level that was under consideration range from few mW to several hundreds of Watts. We might not be interested in building large power-plants to pour hundred of MW at those High Frequencies!
Thanks any way for your probing question! Have Happy Easter Holidays Sir!
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