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This letter presents a high conversion gain double-balanced active frequency doubler operating from 36 to 80 GHz. The circuit was fabricated in a 200 GHz fT and fmax 0.18 ??m SiGe BiCMOS process. The frequency doubler achieves a peak conversion gain of 10.2 dB at 66 GHz. The maximum output power is 1.7 dBm at 66 GHz and -3.9 dBm at 80 GHz. The maximum fundamental suppression of 36 dB is observed at...
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