研究目的
Investigating the feasibility of coupling eight VCO cores via resonant-tank transformers to achieve phase noise reduction in a 60 GHz octa-core push-push VCO.
研究成果
The octa-core 60 GHz push-push VCO demonstrates a phase noise improvement in certain parts of the frequency-tuning curve, but further research is needed to address mismatches in the lower part of the tuning curve.
研究不足
The phase noise improvement from quad- to octa-core VCO is not achieved as expected, possibly due to the tail filter used for second harmonic trap making phase noise improvement narrow-band.
1：Experimental Design and Method Selection:
The study involves designing an octa-core VCO using a 45 nm PD RF-SOI CMOS technology, focusing on coupling eight VCO cores via resonant-tank transformers.
2：Sample Selection and Data Sources:
The VCOs are fabricated in the same technology, with measurements taken at 60 GHz and 30 GHz outputs.
3：List of Experimental Equipment and Materials:
Equipment includes Rohde & Schwarz FSWP Phase Noise Analyzer, R&S Harmonic Mixer FS-Z75, and Keysight N9040B Signal Analyzer.
4：Experimental Procedures and Operational Workflow:
Phase noise and frequency of oscillation are measured, with comparisons made between dual-, quad-, and octa-core VCOs.
5：Data Analysis Methods:
Phase noise performance is analyzed across different offset frequencies from the carrier signal.
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