A reduced-size branch-line coupler for improved LDMOS balanced power amplifiers
Draskovic, D., Koulouzis, H. and Budimir, D. 2009. A reduced-size branch-line coupler for improved LDMOS balanced power amplifiers. Microwave and Optical Technology Letters. 51 (2), pp. 445-448. https://doi.org/10.1002/mop.24058