Please use this identifier to cite or link to this item:
|Title:||Design of X-band and Ka-band Colpitts oscillators using a parasitic cancellation technique|
monolithic microwave integrated circuit (MMIC)
|Citation:||Chen, Y., Mouthaan, K., Lin, F. (2010). Design of X-band and Ka-band Colpitts oscillators using a parasitic cancellation technique. IEEE Transactions on Circuits and Systems I: Regular Papers 57 (8) : 1817-1828. ScholarBank@NUS Repository. https://doi.org/10.1109/TCSI.2009.2037399|
|Abstract:||An X-band and two Ka-band monolithic microwave integrated circuit (MMIC) common drain Colpitts oscillators using a parasitic cancellation technique are designed and fabricated in a 0.2-μm GaAs pHEMT technology with a f T of 60 GHz. The parasitic cancellation technique significantly improves the negative resistance and increases the maximum operating frequency, which is suitable for microwave and millimeter-wave applications. An in-depth theoretical analysis of the Miller effect and insights in the behavior of the input impedance with the parasitic cancellation are provided. The effect of the Q-factor of the inductor used in the cancellation, and the impact of the parasitic cancellation technique on phase noise and frequency tuning range are analyzed and discussed in detail. The X-band design has a measured phase noise of -117.5 dBc/Hz at 1 MHz offset with an output power of -9.3 dBm. The first Ka-band design has a measured phase noise of -94 dBc/Hz at 1 MHz offset with an output power of +0.2 dBm. The second Ka-band design providing more flexibility has a measured phase noise of -98.5 dBc/Hz at 1 MHz offset with an output power of +0.3 dBm. The two Ka-band designs achieve very high fOSC/f T ratios and also demonstrate performance comparable to the best previously published oscillators in a similar frequency range. © 2006 IEEE.|
|Source Title:||IEEE Transactions on Circuits and Systems I: Regular Papers|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 21, 2019
WEB OF SCIENCETM
checked on Jan 2, 2019
checked on Dec 8, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.