The chapter deals with two recently proposed characterization techniques of microwave transistors oriented to high-frequency power amplifier (PA) design. In particular, the nonlinear embedding and de-embedding design techniques are detailed, along with evidence of their advantages with respect to conventional design approaches in terms of power and frequency handling capability. The discussion also details the differences between the two techniques; despite the fact that they share the same theoretical basis, the techniques suffer from different critical facets. Finally, with the aim of guiding the reader towards full comprehension of the topic, different experimental examples are provided for transistor characterization and PA design.
This chapter aims to describe methodologies and techniques for de-embedding device measurements from extrinsic measurements by characterizing the parasitic network surrounding the intrinsic device, through the use of a three-dimensional (3D) physical model of the network and its electromagnetic (EM) analysis. The electromagnetic behavior is obtained employing 3D EM solvers and internal ports. In the first part, the de-embedding processes for field-effect transistor (FET) devices to be used for monolithic microwave integrated circuit designs are studied by four different approaches; in the second part of this chapter, the de-embedding of FET devices for hybrid circuit design purposes is described.
This chapter aims to describe methodologies and techniques for de-embedding device measurements from extrinsic measurements by characterizing the parasitic network surrounding the intrinsic device, through the use of a three-dimensional (3D) physical model of the network and its electromagnetic (EM) analysis. The electromagnetic behavior is obtained employing 3D EM solvers and internal ports. In the first part, the de-embedding processes for field-effect transistor (FET) devices to be used for monolithic microwave integrated circuit designs are studied by four different approaches; in the second part of this chapter, the de-embedding of FET devices for hybrid circuit design purposes is described.
The chapter deals with two recently proposed characterization techniques of microwave transistors oriented to high-frequency power amplifier (PA) design. In particular, the nonlinear embedding and de-embedding design techniques are detailed, along with evidence of their advantages with respect to conventional design approaches in terms of power and frequency handling capability. The discussion also details the differences between the two techniques; despite the fact that they share the same theoretical basis, the techniques suffer from different critical facets. Finally, with the aim of guiding the reader towards full comprehension of the topic, different experimental examples are provided for transistor characterization and PA design.
L'analisi condotta nel presente saggio (di tipo essenzialmente semasiologico) ha cercato di porre in evidenza come il testo vada ad inserirsi all'interno di un pi� generale interesse verso le vicende degli Ugonotti francesi, questi ultimi considerati rappresentativi - "ante litteram" - di quegli ideali di uguaglianza e di libert� che poi sarebbero stati anche il motore di certa parte democratica dell'intellettualit� risorgimentale italiana. Quella dei democratici, che dovettero soccombere di fronte alle istanze moderate di tipo cavouriano, fu una fazione sicuramente perdente, ma di certo non priva di spessore culturale e di impatto sociale, almeno a giudicare dalla pletora di drammi e di tragedie che seppe produrre a testimonianza dei propri ideali. Tale analisi � preceduta dalla disamina di alcuni drammi che presentarono al pubblico tematiche similari, per tentare di individuare una radice comune a cui anche l'ultimo autore esaminato, Gaetano Gattinelli, avrebbe poi fatto riferimento.
Design techniques for nonlinear microwave circuits are much less developed than for linear microwave circuits. Until now there has been no up-to-date text available in this area. Current titles in this field are considered outdated and tend to focus on analysis, failing to adequately address design and measurement aspects. Giannini and Leuzzi provide the theoretical background to non-linear microwave circuits before going on to discuss the practical design and measurement of non-linear circuits and components. Non-linear Microwave Circuit Design reviews all of the established analysis and characterisation techniques available and provides detailed coverage of key modelling methods. Practical examples are used throughout the text to emphasise the design and application focus of the book. * Provides a unique, design-focused, coverage of non-linear microwave circuits * Covers the fundamental properties of nonlinear circuits and methods for device modelling * Outlines non-linear measurement techniques and characterisation of active devices * Reviews available design methodologies for non-linear power amplifiers and details advanced software modelling tools * Provides the first detailed treatment of non-linear frequency multipliers, mixers and oscillators * Focuses on the application potential of non-linear components Practicing engineers and circuit designers working in microwave and communications engineering and designing new applications, as well as senior undergraduates, graduate students and researchers in microwave and communications engineering and their libraries will find this a highly rewarding read.
A collection of fifteen vignettes, Molecules and Women takes a journey through the lives of women connected invisibly across time and space. The narratives carry and embody the voices and actions of women, some spoken, some witnessed, some experienced firsthand. They illuminate pivotal moments, some disguised as ordinary events, others where loss and grief are so overwhelming, or surprise and joy so transformative that the well from which wisdom springs forth is revealed. In the title story, Molecules and Women, Philomena Jackson North, a little girl who goes by the name Willow, surprises her mother, Leona, with her deep thoughts about the world around her. In The Night the Wave Broke, Carla, on the eve of giving birth in a remote mountain village in Spain, seriously questions her husbands sanity and her unborn childs safety. As women come together, the interstices become portals into the deeper chambers of the heart, and questions confronted daily are invited, embraced, and lived. Molecules and Women explores a spiral path of lessons learned, lost, and remembered, into the unfolding landscape of dwelling and discovery.
This book deals with theoretical and practical developments of IEF and offers detailed methodology for many of the commonly used procedures, such as IEF in gels. It is intended both as a reference guide and a practical manual.
A painter and architect in his own right, Giorgio Vasari (1511-74) achieved immortality for this book on the lives of his fellow Renaissance artists, first published in Florence in 1550. Although he based his work on a long tradition of biographical writing, Vasari infused these literary portraits with a decidedly modern form of critical judgment. The result is a work that remains to this day the cornerstone of art historical scholarship. Spanning the period from the thirteenth century to Vasari’s own time, the Lives opens a window on the greatest personalities of the period, including Giotto, Brunelleschi, Mantegna, Leonardo, Raphael, Michelangelo, and Titian. This Modern Library edition, abridged from the original text with notes drawn from earlier commentaries, as well as current research, reminds us why The Lives of the Most Excellent Painters, Sculptors, and Architects is indispensable to any student interested in Renaissance art.
In 1929 in Ferrara, Italy, a sixteen-year-old Jewish boy from a prosperous family befriends both the class leader and a new boy who is aggressive, cynical, and sexually uninhibited.
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