Pozar's new edition of Microwave Engineering includes more material on active circuits, noise, nonlinear effects, and wireless systems. Chapters on noise and nonlinear distortion, and active devices have been added along with the coverage of noise and more material on intermodulation distortion and related nonlinear effects. On active devices, there's more updated material on bipolar junction and field effect transistors.

In this tutorial from High Frequency Electronics magazine, Anthony Bichler describes a technique to achieve broadband matching networks using the Smith Chart. The tutorial article also includes a review of Smith Chart fundamentals.