Measurement techniques for electromagnetic interference shielding and microwave absorption in porous nanocomposites

With the exponential growth in the electronic industry, more and more portable devices have entered the consumer market. Each of these devices emits electromagnetic radiation that could be responsible for the malfunction of other devices. Hence, it is crucial to have shielding materials to prevent the transmission of radiation. Recent research has shown that porous composites can have a high level of shielding owing to radiation having higher interaction within the porous structure. However, it is also crucial to have accurate measurement techniques to assess the performance of these materials. This chapter discusses the most commonly used radiation shielding measurement techniques that are used in wide commercial as well as in military applications. Such different methods are employed for shielding measurements due to the broad frequency range and different shielding requirements. Some of these methods have been developed to well-established standards, some are being used for specific laboratory-scale measurements.