NEW STABILIZATION TECHNIQUE TO PREVENT PARAMETRIC OSCILLATIONS IN A 35 W C-BAND ALGAN/GAN MMIC HIGH POWER AMPLIFIER

摘要： In this paper, a novel stabilization scheme to prevent parametric oscillations in power amplifiers is presented. Based on a new oscillation detection approach, the inductive degeneration technique was used, for the first time, to successfully stabilize a high-power amplifier and prevent parametric oscillations. A 0.15 μm AlGaN/GaN Microwave Monolithic Integrated Circuit high power amplifier operating at 5.8 GHz with 10% fractional bandwidth was designed and successfully stabilized using this approach. The proposed (4.7 × 3.7) mm2 three-stage amplifier achieves a saturated output power of 35 W with 29% power added efficiency and a large-signal gain of 26 dB.