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This paper presents a new implementation for a buffer-feedback oscillator (BFO) at 140 GHz. A novel transmission line (TL) configuration using the top most metal layer of semiconductor fabrication process as the ground, is used for realizing of coupled inductors in the oscillator. This type of TL is shielding the oscillator from packaging effects as well as loss of substrate. Resonance frequency is...
A 129–159 GHz frequency synthesizer is implemented using a low phase noise (PN) 43–53 GHz VCO core driving a featured tunable differential tripler. The load of the proposed tripler can be tuned to the third harmonic of the input frequency to adaptively maximize the output power over the entire range of output bandwidth. The fabricated chip achieves maximum output power of dBm, and the average...
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