Premium
Optimized phase noise of LC VCO using an asymmetric‐inductance tank in InGaP/GaAs HBT technology
Author(s) -
Yoon JaeHo,
Lee SangHun,
Koh AhRah,
Kennedy Gary P.,
Kim NamYoung
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21593
Subject(s) - voltage controlled oscillator , dbc , phase noise , electrical engineering , inductance , offset (computer science) , lc circuit , materials science , microwave , heterojunction bipolar transistor , voltage , engineering , optoelectronics , transistor , telecommunications , capacitor , computer science , bipolar junction transistor , programming language
This paper describes fully integrated low‐phase‐noise MMIC voltage‐controlled oscillators (VCOs) for an adaptive‐feedback interference‐cancellation system (AF‐ICS). The asymmetric‐ and symmetric‐inductance tank structures were combined with VCOs to obtain VCOs with low‐phase‐noise performance. The asymmetric‐inductance tank VCO (AIT‐VCO) has a tuning range of 261 MHz with an output power of −11.53 dBm at 1.715 GHz. Furthermore, the phase noise of this VCO is −117.3 dBc/Hz and −129.3 dBc/Hz at 100‐kHz and 1‐MHz offset frequencies, respectively. The symmetric‐inductance tank VCO (SIT‐VCO) has a tuning range of 160 MHz with an output power of −15 dBm at 1.664 GHz. Furthermore, the phase noise of this VCO is −102.4 dBc/Hz and −121.9 dBc/Hz at 100‐kHz and 1‐MHz offset frequencies, respectively. Each of these VCOs occupies a total chip area of 0.9 × 0.9 mm 2 . © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1035–1040, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21593