editorial advanced rf and analog integrated circuits for fourth … · 2019. 7. 31. · advanced rf...

Hindawi Publishing CorporationInternational Journal of Microwave Science and TechnologyVolume 2013, Article ID 272070, 2 pageshttp://dx.doi.org/10.1155/2013/272070

EditorialAdvanced RF and Analog Integrated Circuits for FourthGeneration Wireless Communications and Beyond

Ramesh Pokharel,1 Leonid Belostotski,2 Akira Tsuchiya,3

Ahmed Allam,4 and Mohammad S. Hashmi5

1 Faculty of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan2Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada T2N 1N43Department of Communications andComputer Engineering, Graduate School of Informatics, KyotoUniversity, Kyoto 606-8501, Japan4Department of Electronics and Communication Engineering, Egypt-Japan University of Science and Technology,Alexandria 21934, Egypt

5 IIIT Delhi, New Delhi 110020, India

Correspondence should be addressed to Ramesh Pokharel; [email protected]

Received 3 May 2013; Accepted 3 May 2013

Copyright © 2013 Ramesh Pokharel et al. This is an open access article distributed under the Creative Commons AttributionLicense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properlycited.

Fourth generation wireless communications are approachingtomarket, and recent innovations are at peak to come upwithRF and analog circuit solutions to provide low power andhigh speed tiny chips at very low cost. This special issuepresents the researches and technical know-how suitable forcritical advanced researches in ICs development. After rigor-ous review of numerous research and review articles, this spe-cial issue finalizes one review article and three research arti-cles which address the recent developments in IC design andare suitable for publication in this peer journal.

Oscillators are one of the most critical components oftransceiver, and designing low phase noise oscillators oper-ating at several GHz is a challenging task. To help researchersunderstand the design implementation and its performancewith different topologies and architectures, the recent advan-ces in CMOS VCOs are discussed. Recently, innovations inCMOS oscillators have extended to higher end of millimeter-wave region maintaining their performance comparable tomicrowave oscillators.

Present and future communication systems demand thatelectronic devices be suitable for a range of applications withdifferent bandwidth, speed, and accuracy. This necessitatesthe need for reconfigurable devices, and to cover this flavor,innovation in reconfigurable LNA for UWB receivers hasbeen addressed. This LNA exploits the programmable circuitto control the mode of operation and with current reuse

improves the gain and flatness.The designed LNA operates intwo subbands ofMB-OFDMUWB,UWBmode-1 andmode-3, as a single or concurrent mode.

Miniaturization is the key for CMOS technology andbulky inductors are the main hindrance. Therefore, circuittopology without a bulky inductor is highly desired and pro-moted. Inductorless PLL with subharmonic pulse injectionlocking has been introduced. A half-integral subharmoniclocking technique helped to improve phase noise characteris-tics.

Although, recent developments and scaling of CMOStechnology are pushing the signal processing into digitaldomain, the hard truth is that the real world is analog, and,therefore, analog-to-digital converter is an integral part ofchip design. Delta-sigma modulator is gaining more andmore attention and popularity because of its potential toachieve high resolution and high speed. Continuous-timedelta-sigmamodulator helps to design low power modulator,and hence a systematic design methodology to design suchmodulator is presented.

Acknowledgments

Wehope our readers can enrich their knowledge through ourvariety of papers, and we would like to thank all our editors,

2 International Journal of Microwave Science and Technology

reviewers, and technical staffs who are directly or indirectlyinvolved in making this special issue concisely informativeand successful.

Ramesh PokharelLeonid Belostotski

Akira TsuchiyaAhmed Allam

Mohammad S. Hashmi

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