Quay, RüdigerRüdigerQuay2023-08-072023-08-072023https://publica.fraunhofer.de/handle/publica/44764210.1007/978-3-030-94100-0_7Active and passive semiconductor devices and circuits have revolutionized our way of living. They are key components in applications such as computing, internet, mobile communication, and sensing. This chapter addresses the main characteristics of the underlying semiconductor materials, devices, and (integrated) circuits suitable for analogue microwave and RF-applications.enbook article