Study on wideband voltage controlled oscillator and high efficiency power amplifier ICs for wireless communications

制度:新 ; 報告番号:甲3604号 ; 学位の種類:博士(工学) ; 授与年月日:2012/2/20 ; 早大学位記番号:新595

Voltage controlled oscillator for mm-wave radio systems

Abstract. The advancement in silicon technology has accelerated the development of integrated millimeter-wave transceiver systems operating up to 100 GHz with sophisticated functionality at a reduced consumer cost. Due to the progress in the field of signal processing, frequency modulated continuous wave (FMCW) radar has become common in recent years. A high-performance local oscillator (LO) is required to generate reference signals utilized in these millimeter-wave radar transceivers. To accomplish this, novel design techniques in fundamental voltage controlled oscillators (VCO) are necessary to achieve low phase noise, wide frequency tuning range, and good power efficiency. Although integrated VCOs have been studied for decades, as we move higher in the radio frequency spectrum, there are new trade-offs in the performance parameters that require further characterization. The work described in this thesis aims to design a fully integrated fundamental VCO targeting to 150 GHz, i.e., D-Band. The purpose is to observe and analyze the design limitations at these high frequencies and their corresponding trade-offs during the design procedure. The topology selected for this study is the cross-coupled LC tank VCO. For the study, two design topologies were considered: a conventional cross-coupled LC tank VCO and an inductive divider cross-coupled LC tank VCO. The conventional LC tank VCO yields better performance in terms of phase noise and tuning range. It is observed that the VCO is highly sensitive to parasitic contributions by the transistors, and the layout interconnects, thus limiting the targeted frequency range. The dimensions of the LC tank and the transistors are selected carefully. Moreover, the VCO performance is limited by the low Q factor of the LC tank governed by the varactor that is degrading the phase noise performance and the tuning range, respectively. The output buffer loaded capacitance and the core power consumption of the VCO are optimized. The layout is drawn carefully with strategies to minimize the parasitic effects. Considering all the design challenges, a 126 GHz VCO with a tuning range of 3.9% is designed. It achieves FOMT (Figure-of-merit) of -172 dBc/Hz, and phase noise of -99.14 dBc/Hz at 10 MHz offset, Core power consumption is 8.9 mW from a 1.2 V supply. Just falling short of the targeted frequency, the design is suitable for FMCW radar applications for future technologies. The design was done using Silicon-on-Insulator (SOI) CMOS technology

Etude et réalisation de réseaux d'adaptation d'impédances accordables linéaires et non linéaires, sur PCB et silicium CMOS, pour des applications en radiofréquences

L objectif de ce travail est d aborder la conception de réseaux d adaptation d impédance accordable (RAA) dans deux contextes bien distincts en radiofréquences : le RAA en faible signal et le RAA en fort signal.Concernant les aspects faible signal, des critères de performance de RAA ont été établis et étudiés. Une nouvelle expression générale de l efficacité d un RAA a été développée. Elle permet de prédire le rendement d un RAA à partir des facteurs de qualité des composants dont on dispose dans une technologie donnée et du rapport de transformation à réaliser. Des abaques de couverture d impédances en fonction des pertes d insertion ont été calculés. Ils mettent en évidence les régions de couverture où le RAA apporte une amélioration à la performance du système, pour diverses topologies de RAA.Un démonstrateur sur PCB a été réalisé. Il est constitué de deux RAA, qui assurent l adaptation simultanée d un amplificateur de puissance sur une large plage d impédances, comprises dans un cercle de l abaque de Smith d équation VSWR < 5 :1. La zone de couverture a été mesurée et présentée en fonction des pertes d insertion, qui mettent en évidence les régions où les RAA contribuent à l amélioration de la performance de l amplificateur et celles où les pertes d insertion du RAA n arrivent pas à compenser le gain du à la réduction des coefficients de réflexion.Dans une seconde partie, la conception de RAA en fort signal a été traitée. L objectif a été de présenter à la sortie d un amplificateur de puissance les impédances qui optimisent son efficacité pour chaque puissance de travail. Un démonstrateur en technologie CMOS SOI 130 nm a été conçu et simulé. Il consiste en un amplificateur de puissance pour le standard WCDMA, fonctionnant à 900 MHz, et un RA accordable par des varactors MOS, capable de générer les impédances optimales correspondant à des puissances de sortie comprises entre 20 et 30 dBm. Les résultats ont mis en évidence le bénéfice apporté par l insertion d un RA accordable par rapport à un RA fixe.The aim of this research was the design of tunable matching networks, in two different contexts: the TMN at low and high signals.Performance criteria of TMN were studied. A general expression has been developed that estimates the TMN efficiency in function of the quality factor of the components used. The impedance coverage of different RAA topologies was plotted in function of the insertion losses.For the small signal, we designed a prototype in PCB, composed by two TMN, which ensure the simultaneous matching of a power amplifier in a wide range of impedances, included in a circle of the Smith chart VSWR < 5: 1. The coverage area was measured and presented in function of the insertion losses, emphasizing the areas where the TMN contribute to improve the amplifier performance and those where insertion losses of the TMN are not able to compensate gain with the reduction of the reflection coefficients.Subsequently, we discussed the design of TMN for the large signal. The objective is to present at the output of a power amplifier, the impedances that optimize efficiency for each power of operation. A 130 nm SOI prototype was designed and simulated, consisting of a power amplifier for WCDMA standard, 900 MHz, and a MN tunable by MOS varactors able to produce the optimal impedances corresponding to an output power between 20 and 30 dBm. The results showed the benefit provided by inserting a tunable MN compared to a fixed one.SAVOIE-SCD - Bib.électronique (730659901) / SudocGRENOBLE1/INP-Bib.électronique (384210012) / SudocGRENOBLE2/3-Bib.électronique (384219901) / SudocSudocFranceF

Abstracts on Radio Direction Finding (1899 - 1995)

The files on this record represent the various databases that originally composed the CD-ROM issue of "Abstracts on Radio Direction Finding" database, which is now part of the Dudley Knox Library's Abstracts and Selected Full Text Documents on Radio Direction Finding (1899 - 1995) Collection. (See Calhoun record https://calhoun.nps.edu/handle/10945/57364 for further information on this collection and the bibliography). Due to issues of technological obsolescence preventing current and future audiences from accessing the bibliography, DKL exported and converted into the three files on this record the various databases contained in the CD-ROM. The contents of these files are: 1) RDFA_CompleteBibliography_xls.zip [RDFA_CompleteBibliography.xls: Metadata for the complete bibliography, in Excel 97-2003 Workbook format; RDFA_Glossary.xls: Glossary of terms, in Excel 97-2003 Workbookformat; RDFA_Biographies.xls: Biographies of leading figures, in Excel 97-2003 Workbook format]; 2) RDFA_CompleteBibliography_csv.zip [RDFA_CompleteBibliography.TXT: Metadata for the complete bibliography, in CSV format; RDFA_Glossary.TXT: Glossary of terms, in CSV format; RDFA_Biographies.TXT: Biographies of leading figures, in CSV format]; 3) RDFA_CompleteBibliography.pdf: A human readable display of the bibliographic data, as a means of double-checking any possible deviations due to conversion