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    초록·키워드

    We report our research work on the millimeter-wave broadband cascode amplifier using the shunt peaking technology and the PHEMTs. The broadband cascode amplifier on MMIC technology was designed and fabricated using the active and passive library. To prevent oscillation of the broadband cascode amplifier, a parallel resistor and capacitor were connected to drain of common-gate device. To extend bandwidth and flat gain, we inserted a short stub into bias circuits and a compensation transmission line between common-source device and common-gate device. Also, the input and output stages were designed using the matching method to obtain the broadband characteristic. From the measurement, we could confirm to extend bandwidth and flat gain by integrating the shunt peaking technology with the cascode configuration. The cascode amplifier shows the broadband characteristic from 19 GHz to 53.5 GHz. Also, the average gain of this amplifier is about 6.5 dB over the bandwidth.

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      UCI(KEPA) : I410-ECN-0101-2013-569-001044409