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Pseudomorphic HEMT manufacturing technology for multifunctional Ka-band MMIC applications

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11 Author(s)
Wu, C.S. ; Gallium Arsenide Operations, Hughes Aircraft Co., Torrance, CA, USA ; Pao, C.K. ; Yau, W. ; Kanber, H.
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We have demonstrated very good performance, high yield Ka-band multifunctional MMIC results using our recently developed 0.25-μm gate length pseudomorphic HEMT (PHEMT) manufacturing technology. Four types of MMIC transceiver components-low noise amplifiers, power amplifiers, mixers, and voltage controlled oscillators-were processed on the same PHEMT wafer, and all were fabricated using a common gate recess process. High performance and high producibility for all four MMIC components was achieved through the optimization of the device epitaxial structure, a process with wide margins for critical process steps and circuit designs that allow for anticipated process variations, resulting in significant performance margins. We obtained excellent results for the Ka-band power amplifier: greater than 26 dBm output power at center frequency with 4.0% standard deviation over the 3-in. wafer, 2-GHz bandwidth, greater than 20 pet-cent power-added efficiency, over 8 dB associated gain, and over 10 dB linear gain. The best performance for the Ka-band LNA was over 17 dB gain and 3.5 dB noise figure at Ka-band. In this paper, we report our device, process, and circuit approach to achieve the state-of-the-art performance and producibility of our MMIC chips

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 2 )