am designing a Patch Antenna to be used on a small satellite in LEO orbit, For protection i am using a Delrin as a Radome of (75x75x3)mm dimensions. As delrin is an insulator it is susceptible to charge storage, Can you guide me as to what sort of material/coating/paint should i use for ESD protection without affecting my Radiation, as most of the Paints/coatings available for ESD have high conductivity and as per my understanding they are not microwave transparent.
Also for the size mentioned above at LEO orbit is it necessary to cater for ESD, The Delrin is fixed to the satellite body with eight screws.
ESD should not be an issue in LEO. The ionospheric plasma will prevent charge buildup unless the voltage is impressed onto a conductor by a power source. That won't be the case for Delrin, a good insulator. You may require a coating with the proper solar absorptivity and emittance to control the thermal situation. Also, if in LEO an extended period of time the atomic oxygen environment in LEO is very chemically reactive. An inorganic thermal control coating may be used. These are available in industry.
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