MICROWAVE AND RF CIRCUIT DESIGN FOR WIRELESS COMMUNICATIONS

Le Monde En Tique

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Ouvrage 0-89006-818-6 : MICROWAVE AND RF CIRCUIT DESIGN FOR WIRELESS COMMUNICATIONS
Chapter 1 presents an overview of the general area of wireless communications: the market, frequencies, and technologies required to address it, The services addressed by the wireless industry include the ubiquitous cellular telephone and pager, in addition to the emerging markets of PCS, satellite-based telephony and data transmission, low-cost microwave links ,and wireless local area networks. In a field that is changing as rapidly as this, some of the information is evolving even as we finish production of the book, but we have tried to make this material as up to date and thorough as possible. Chapter 2 of the book presents an overview of wireless communications stan- dards and the RF system design considerations associated with their implementation. These new standards cover voice and data transmission over a variety of frequency bands in the United States as well as Europe and Asia. The chapter makes the point that traditional RF design approaches often fall short of meeting the requirements of modern digital wireless communications products, and presents some illustrative examples where different design methodologies are required to meet these new requirements.
Chapter 3 of this book presents an overview of the general field of wireless RE integrated circuit design, with particular emphasis on the historical development of radio receiver architectures, receiver design, and low-power techniques. This chapter develops the argument that modern communications system designs will rely on direct downconversion and other novel architectural approaches to realize the low-power/low-cost requirements of handheld consumer communications equipment. Chapter 4 presents a detailed overview of digital RF modulation techniques and their circuit implementations. This material is normally covered in digital com- munications textbooks. Here, we have developed a one-chapter summary of the key results of that field, with particular emphasis on those modulation schemes that are currently being implemented in modern communications systems. The chapter also adopts the practical approach of outlining the methods of implementing those modu- lation techniques with a variety of circuit approaches. Chapter 5 presents a thorough review of the design and fabrication of RF and microwave mixers. Once again, this field is often covered in an entire text. We have chosen here to cover those areas of mixer design particular to the field of wireless communications and have emphasized practical circuit approaches to mixer design, rather than theoretical depth. Chapter 6 presents a complete overview of frequency synthesizer designs for wireless communications, with particular emphasis on VCO, PLL, and DDS imple- mentations. The circuits often form the "heart" of the communications system in the sense that they provide the modulation and demodulation frequencies for tuning the transmitted and received signals. As a result, their performance and cost are crucial to the realization of acceptable system performance. Finally, Chapter 7 presents a complete overview of the field of RF and micro- wave amplifier design. Although the design of amplifiers is a relatively mature field, a variety of new circuit architectures have been developed in the last few years that address the particular requirements presented by the wireless communications field. These requirements include an extremely high dynamic range in conjunction with low-power operation, as well as high efficiency in power output stages in conjunction with low-voltage operation. In addition, monolithic solutions are now being pursued where a hybrid approach would have been standard only a few years earlier.

Auteur : LARSON
Editeur : ARTECH HOUSE
Nombre de pages : 360
Date de publication : 05 1996

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