Abstract
In this paper, a high-efficiency K-band MMIC power amplifier using multi-harmonic load terminations is designed and implemented in a 0.15μm GaAs PHEMT processing technology. At the bias voltages of VD=5V and VG=−0.9V, the three-stage MMIC amplifier attains 25dB linear gain in average, 20dBm saturation power, lower than −15dB input return loss, and lower than −10dB output return loss from 25 to 27GHz. With this 2GHz bandwidth, the proposed amplifier can provide 40% higher power added efficiency than that of the conventional designs.
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