Demonstration of a Switchless Class E/Fodd Dual-Band Power Amplifier

F. Bohn, S. Kee, and A. Hajimiri

A 250 W dual-band power amplifier belonging to the Class E/F switching amplifier family is presented. The amplifier operates in the 7 MHz and 10 MHz HAM bands, achieving 16 dB and 1 5 d B gain with power added efficiencies (PAE) of 92 70 and 87 % in those bands, respectively. It utilizes dual-resonant passive input and output networks to achieve high-efficiency Class E/F,,,,d operation at both frequencies of operation, allowing the same passive networks to be used for both frequency bands without the use of band-select switches