Abstract-The main goal of this work is the analysis of the multipactor effect within a coaxial waveguide excited by an RF pulsed signal. The variation of the multipactor RF voltage threshold with the ON interval length of the pulse has been analyzed. To reach this aim, an in-house multipactor simulation code based on the Monte-Carlo algorithm has been implemented. Numerical simulations show that the multipactor RF voltage threshold increases as the ON pulse interval diminishes. In addition, an experiment was carried out to validate the proposed theoretical model, demonstrating the excellent agreement between theory and experimental data. Finally, the results are compared to the "20-gap-crossing" rule used in the space standard document (ECSS-E20-1A).
Abstract-When measuring RF or microwave devices under a temperature profile inside a climatic chamber, one of the main problems lies in the impossibility to have the network analyzer calibrated for all the temperatures measured along the profile. Typically, the calibration is performed just at room temperature, assuming that there is going to be an error in the rest of the measured temperatures. That error will be higher the further we are from room conditions. In this work, we present a systematic procedure for accurately measuring the S-parameters of a device at different temperatures. It applies a calibration algorithm using the S-parameters of the device under test (DUT) and of the calibration standards measured at the different temperatures of interest along the temperature profile.
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