This paper analyzes and demonstrates the use of coupled-LC tanks to enlarge the locking range (LR) of millimeter-wave (mm-wave) subharmonically injection-locked oscillators. Design guidelines are derived from a simplified analysis. Different techniques are proposed to tune the coupled-LC tank. A mm-wave subharmonically injection-locked quadrature voltage-controlled oscillator in 40-nm CMOS verifies the proposed approach. The LR is larger than 2 GHz over a 55-63-GHz tuning range. An on-chip envelope detector facilitates the tuning of the coupled-LC tank. The phase noise and the quadrature-phase imbalance are uniform over almost the whole LR.
Mangraviti, G, Khalaf, K, Parvais, B, Vaesen, K, Szortyka, V, Vandersteen, G & Wambacq, P 2015, 'Design and Tuning of Coupled-LC mm-Wave Subharmonically Injection-Locked Oscillators', IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 7, pp. 2301-2312. https://doi.org/10.1109/TMTT.2015.2439259
Mangraviti, G., Khalaf, K., Parvais, B., Vaesen, K., Szortyka, V., Vandersteen, G., & Wambacq, P. (2015). Design and Tuning of Coupled-LC mm-Wave Subharmonically Injection-Locked Oscillators. IEEE Transactions on Microwave Theory and Techniques, 63(7), 2301-2312. https://doi.org/10.1109/TMTT.2015.2439259
@article{65b0ca20b45041d3b9704fdbb2bd3c73,
title = "Design and Tuning of Coupled-LC mm-Wave Subharmonically Injection-Locked Oscillators",
abstract = "This paper analyzes and demonstrates the use of coupled-LC tanks to enlarge the locking range (LR) of millimeter-wave (mm-wave) subharmonically injection-locked oscillators. Design guidelines are derived from a simplified analysis. Different techniques are proposed to tune the coupled-LC tank. A mm-wave subharmonically injection-locked quadrature voltage-controlled oscillator in 40-nm CMOS verifies the proposed approach. The LR is larger than 2 GHz over a 55-63-GHz tuning range. An on-chip envelope detector facilitates the tuning of the coupled-LC tank. The phase noise and the quadrature-phase imbalance are uniform over almost the whole LR.",
keywords = "Coupled resonator, injection-locked oscillator (ILO), locking range (LR), millimeter-wave (mm-wave) circuits, 60 GHz, subharmonic injection locking",
author = "G. Mangraviti and K. Khalaf and Bertrand Parvais and Kristof Vaesen and V. Szortyka and Gerd Vandersteen and Piet Wambacq",
year = "2015",
month = jul,
day = "1",
doi = "10.1109/TMTT.2015.2439259",
language = "English",
volume = "63",
pages = "2301--2312",
journal = "IEEE Transactions on Microwave Theory and Techniques",
issn = "0018-9480",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",
}