Effects of Electron/Ion Particle Spray on Antennae

[Titurial]

I was wondering if an antenna could pick up some sort of signal if it was exposed to a spray of electrons or ions. For instance I have a patch antenna calibrated for 300 MHz. The patch antenna was placed in an environment where it could be getting sprayed by a wave of electrons followed by a wave of ions. In the antenna response I see a very strong signal voltage drop follow by a strong spike that is temporally correlated with when it would be getting sprayed, but the frequency of this signal is orders of magnitude below 300 MHz. Is this a possible effect of the particle spray, or is it more likely that something else is the cause of this low frequency signal showing up on a high frequency antenna. Any help would be GREATLY appreciated!

 

[Drakkith]

Is this something that is actually happening? If so, what kind of environment is your antenna located in?

 

[Titurial]

The antenna is located near a target that is being impacted by small iron particles traveling around 30 km/s