complex permittivity

Complex permittivity is a way to describe how a material interacts with electric fields. It has two parts: the real part, which indicates how well the material can store electrical energy (like capacitance), and the imaginary part, which shows how much energy is lost as heat when the material is exposed to an alternating electric field. Together, these parts help us understand how materials behave in electrical and microwave applications, such as antennas or insulation, revealing both their ability to hold charge and their energy dissipation characteristics.