Using Baluns and RF Components for Impedance Matching - EEWeb
Electronics | Free Full-Text | Analysis and Design of a Fully-Integrated High-Power Differential CMOS T/R Switch and Power Amplifier Using Multi-Section Impedance Transformation Technique
differential - Ouput impedance of a balun - Electrical Engineering Stack Exchange
Demystifying Transformers: Baluns and Ununs - Mini-Circuits Blog