Power amplifier MMICs for 15 GHz microwave links in 0.25 μm GaN technology

This paper presents three power amplifiers designed for 15 GHz microwave radio application employing GaN 0.25 μm technology. The first design is a 3W combined power amplifier, the second is a 7-15 GHz dual-band 3W combined power amplifier, and the third is a 4W Doherty power amplifier. Advantages and limitations of GaN 0.25 μm technology applied to the three different design solutions for this specific application are discussed, presenting and comparing the measurement results obtained on the developed amplifiers