5 Humidity and Temperature Insertion Loss

At higher temperature and humidity, insertion loss increases. The amount of loss depends on the operating data rate: At a higher data rate, loss increases. Additionally, this also depends on the board material. For example, Ultra Low Loss material has less loss across data rate versus standard loss. Therefore, some loss due to the electrical characteristics of the board material ought to be considered. Insertion loss is expected to be up to 8% higher at temperature for ultra low-loss materials such as Megtron 6, compared to nominal temperature, compared to higher loss materials such as FR4 where insertion loss is 11% higher at temperature compared to nominal.