N this information era people are living in a society in which processing, ?ow and Iexchange of information are vital for their existence. Two major issues in such so- ety, which are related to ?ow and exchange of information, are connectivity and mobility. On one hand, computers and Internet provide connectivity and allow communication as well as fast access to large amounts of information. On the other hand, wireless techno- gies bring mobility. People can move and still be able to communicate and have access to various kind of information. Therefore, the functioning of an information society is unthinkable without the use of computers, Internet and wireless technologies. The exp- tations are that in the future they will merge into a unique system for communication, access to information as well as their exchange and processing. The era of wireless communications started in 1901, when Guglielmo Marconi s- cessfully transmitted radio signals across the Atlantic Ocean. From that moment up to now wireless communications experienced explosive growth and became the fastest growing ?eld in the engineering world. Pushed by customer requirements, new wireless techno- gies have been emerging very fast. Each new generation of wireless technologies have brought new features and more complexity. Pushed by market forces to reduce costs, the semiconductor industry has provided new technologies for solid-state circuits implem- tation. Fortunately at the same time with the cost reduction, performance of new te- nologies has been improving.

Problems and solutions in the design of multi-standard RF front-ends on the system, circuit and implementation level have been addressed Problems, solutions and cost-effectiveness related to implementation of adaptivity in RF front-ends have been addressed Problems and solutions related to operation of CMOS electronic circuits at low supply voltages have been addressed Problems and solutions for optimising RF electronic circuits have been addressed

Autorentext

Khaled Khalaf Khaled Khalaf obtained his Ph.D. in Electrical Engineering from Vrije Universiteit Brussel, Belgium in 2016. He works as a researcher at IMEC, Leuven, Belgium with interest on CMOS mm-wave circuits and systems for wireless applications with more emphasis on low-power transmitters for high datarate communication. Vojkan Vidojkovic Vojkan Vidojkovic received his PhD degree from the Eindhoven University of Technology in the Netherlands in 2007. He works as a technical staff member at Intel in Germany. John R. Long John R. Long has a Ph.D. degree in Electronics from Carleton University in Ottawa. He worked in industry for 12 years in the Advanced Technology Laboratory at Bell-Northern Research in Ottawa, and in January 2015 he was appointed Professor in Electrical and Computer Engineering at the University of Waterloo in Canada. His current research interests include low-power and broadband circuits for highly-integrated wireless transceivers, energy-efficient wireless sensors, mm-wave IC design, and electronics design for high-speed data communications. Piet Wambacq Piet Wambacq has a Ph.D. degree from the Katholieke Universiteit Leuven, Leuven, Belgium. He is a Principal Scientist at IMEC, Heverlee, Belgium, working on RF CMOS design for wireless applications. Since 2000 he is a Professor with the University of Brussels, Brussels, Belgium.

Klappentext

The design and use of multi-standard RF transceivers is the way to increase hardware flexibility and functionality, as well as to improve the flexibility of set-makers on the market. In the design of multi-standard RF transceivers the efforts will be directed towards improvement of hardware reusability, reconfigurability, programmability and flexibility. This will result in the launching of a software-defined radio.

Since the radio environment is variable, the application of adaptivity in RF transceivers results in the reduction of their power consumption. Eventually, it is reasonable to believe that RF front-ends will be smart in the sense that they will be able to monitor the radio environment and to adapt themselves to the changes in this environment paving the way for a cognitive radio.

Adaptive Multi-Standard RF Front-Ends investigates solutions, benefits, limitations and costs related to multi-standard operation of RF front-ends and their adaptivity to variable radio environments. Next, it highlights the optimization of RF front-ends that allow achieving of maximal performance with a certain power budget while targeting full integration. Also, it investigates possibilities for low-voltage low-power circuit topologies in CMOS technology.

The concepts and considerations presented in this book have been validated through the design and implementation of the reconfigurable multi-band DECT/Bluetooth RF front-end in 0.18 um CMOS technology.

The successful design and implementation of the reconfigurable DECT/Bluetooth RF front-end is the result of systematic approach through all the steps in the design flow of a multi-standard front-end starting with the system level design, continuing with the circuit level design and implementation, and ending with the validation based on measurements.

Inhalt
Front-end architecture selection.- Broad-band polyphase filters.- Analysis of low-IF architectures.- RF and building block specifications.- A low-voltage folded switching mixer.- Multi-band reconfigurable complex mixer.- Reconfigurable multi-band LNA.- Reconfigurable multi-band RF front-end.- Conclusions.