Learning Forum

[i.vagias]

Hello folks. I am trying to do a phenomenically very simple task is HFSS, that of calculating the radar cross section of a PEC chaff hair (143.9mm long, 50μm in diameter) vs frequency. I do not perform an azimuth nor elevation scan; hence the irradiating antenna is staring at the chaff hair at broadside angle. Furthermore the polarization of the incident wave is parallel to the chaff hair.

I have tried my HFSS methodologies to perform this task; my computer either crashed/frozen, or it took 4 days to produce erroneous results. I have calculated the theoretical RCS and gain of a chaff hair with MATLAB, and I know what kind of results to expect, either gain or RCS. By the way, the main goal is to measure the RCS of the chaff. However, the chaff itself scatters like an antenna when irradiated. Hence, we can derive the chaff gain from the RCS and wavelegth. Knowing that the chaff gain is 2.14dBi at the resonance frequency (a 143.9mm long chaff resonates at 1 GHz), we can very if HFSS is producing the right results. I am happy to share screenshots of what I've done so far. Finally, I am usng a Lenovo P50 Thinkpad Intel i7 with 32GB of RAM.