The passive intermodulation is a very low intensity interference effect produced on any surface that is made up of two different metals. However, its intensity is so low that only in exceptional cases such space communications are affected by it.
For example, satellite antennas operating at the same time in transmission and reception but at different frequencies can generate PIM. Due to imperfections in the antenna or in components close to it, which share the same radiofrequency path, the signal transmitted to the Earth can generate undesired tones, called intermodulation products, which, although they are of very low intensity, interfere with the reception of the signal, being able to “deaf” the satellite.
We have test benches dedicated to passive intermodulation in frequency bands L, S, C, X and K, in addition to the test benches that we can build on demand to measure in other frequency bands.