The idea for the master dissertation appeared with the need for the laboratory of electromagnetic compatibility (EMC) in the company Instrumentation Technologies d.o.o with the purpose of testing the compliance of electronic devices with the standards of electromagnetic compatibility.
Every electric device during the operation produces electromagnetic radiation and also can be affected by the electromagnetic radiation from other devices. That the electric device can be sold on the market should suffice with the limits provided by the electromagnetic compatibility standards.
Electric device testing must be performed in a controlled environment with calibrated instruments. To ensure a controlled environment, a device for calibration is needed. One such device is a radio-frequency comb generator - COMB. Spectral components of the COMB generator are numerical multiples of the original signal, in which frequency and amplitude are known.
The COMB generator device is used to evaluate the measurements of the electromagnetic disturbances of the measuring chamber or the environmental disturbances. COMB generator radiation is used as a reference during the measuring of the electromagnetic disturbances of the testing devices. Before the radiation of the device tested is measured, the COMB radiation is measured which gives us the knowledge of the environmental influences – reference radiation, and after that, the device tested is measured.
A Radio-frequency comb generator generates the spectrum of the signal between 10 MHz and 1 GHz with two possible steps between the spectral components, 10 MHz or 100 MHz. Step between the signal spectrum components could be selected during the device operation.
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