Back to Search
Start Over
A Ka-Band Dual-Band Digitally Controlled Oscillator With −195.1-dBc/Hz FoM ${_T}$ Based on a Compact High- $Q$ Dual-Path Phase-Switched Inductor.
- Source :
- IEEE Transactions on Microwave Theory & Techniques; Jul2019, Vol. 67 Issue 7, p2748-2758, 11p
- Publication Year :
- 2019
-
Abstract
- In this paper, a compact, low-loss, dual-path phase-switched inductor suitable for millimeter-wave (mmWave) transceiver subblocks is proposed. The signal path through the structure is determined by the relative polarity of two differential excitation signals applied to the four-port structure. Because inductance is varied by altering signal path through the inductor, signal-path MOSFET switches are avoided. The inductor, therefore, demonstrates high, mode-invariant quality factor, facilitating the design of high-performance dual-band mmWave transceiver subblocks. Based on the proposed inductor, a dual-band Ka-band oscillator is designed in a 65-nm CMOS technology which covers two frequency bands from 14.8 to 18.7 GHz and from 20.8 to 26.6 GHz. The proposed inductor facilitates a widely tunable, dual-band frequency range while maintaining the state-of-the-art phase noise, power consumption, and figure of merit (FoM). The oscillator achieves measured fractional tuning ranges of 23.3% and 24.5% and phase noise of −115.1 dBc/Hz at 2-MHz offset while consuming only 4.8-mW dc power. A peak tuning-range FoM of −195.1 and −194.9 dBc/Hz is demonstrated across the low- and high-frequency bands. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 67
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 137295191
- Full Text :
- https://doi.org/10.1109/TMTT.2019.2917671