RF hyperthermia therapy is a medical treatment in which body tissue is exposed to RF power in order to increase the tissue temperature locally to fever levels, for example to treat cancer. For this procedure, tumour-loaded tissue is heated to high fever temperatures of 40-43° using electromagnetic waves. Research has shown that these increased temperatures can damage and kill cancer cells while causing only minimal injury to healthy tissue. Hyperthermia is a supplementary treatment that is usually applied in combination with established cancer therapies like radiotherapy and chemotherapy. Solid state RF energy offers the possibility to have precise control over the amount and location of the energy delivered.