Holger Heuermann 
Microwave Technology [PDF ebook] 
Field Simulation, Non-linear Circuit Technology, Components and Subsystems, Plasma Technology, Antennas and Propagation

The book covers various numerical field simulation methods, nonlinear circuit technology and its MF-S- and X-parameters, as well as state-of-the-art power amplifier techniques. It also describes newly presented oscillators and the emerging field of GHz plasma technology. Furthermore, it addresses aspects such as waveguides, mixers, phase-locked loops, antennas, and propagation effects, in combination with the bachelor’s book 'High-Frequency Engineering, ’ encompassing all aspects related to the current state of GHz technology.