This standard BS EN IEC 62037-5:2021 Passive RF and microwave devices, intermodulation level measurement is classified in these ICS categories:
33.040.20 Transmission systems
This part of IEC 62037 defines test fixtures and procedures recommended for measuring levels of passive intermodulation generated by filters, typically used in wireless communication systems. The purpose is to define qualification and acceptance test methods for filters for use in low intermodulation (low IM) applications.