This book offers a synthetic presentation of the fascinating subject of microwave engineering technology, intended for a university master's degree course. The topics are: a quick review of guided wave propagation, matrix description of circuits, microwave passive devices, resonators and finally microwave filters, a subject that covers about half of the book. The final goal is to smoothly drive the reader towards an educated design of the devices discussed in the book. Because of the rather practical and synthetic approach, we assume some background on electromagnetic waves and distributed circuits.