Due to the unprecedented growth in wireless applications, development of low-cost solutions for RF and microwave communication systems has become of great importance. This is a comprehensive treatment of lumped elements, which are playing a critical role in the development of the circuits that make these cost-effective systems possible. The work offers an in-depth understanding of the different types of RF and microwave circuit elements, including inductors, capacitors, resistors, transformers, via holes, airbridges and crossovers. Supported with over 220 equations and more than 200 illustrations, it covers the practical aspects of each element in detail. From materials, fabrication and analyses to design, modelling and physical, electrical and thermal applications, this resource offers coverage of the critical topics for work in the field.