A Review of Highly Efficient Class F Power Amplifier Design Technique in Gigahertz Frequencies - Sa’Ahmad, D.A.; Sapawi, R.; Masra, S.M.W.; Mohamad Hasnul, D.H.A.; Yusuf, D.S.A.A.; Sahari, S.K.; Sawawi, M. (Universiti Teknikal Malaysia (UTEM), 2017)