3. Book Chapters
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Item Techniques to improve gain-bandwidth 5g ics(2021) Vignesh R.; Kumar R.; Song H.; Kumar S.This chapter introduces a basics of designs and techniques to improve gain-bandwidth for 5G ICs. The major focus would be on the various network topologies that yield to provide easy implementation of on-chip components for 5G-ICs. Section 1 discusses the basics of RLC tank networks, which includes RC parallel network, RLC network and series to parallel resonant network. The parameters such as quality factor, noise of filter networks are shortly refresh while foundation of resonant circuits would set-up for 5G transceiver ICs. Section 2 introduces coupled resonator networks can be used as microwave components to achieve a better gain-bandwidth trade-off. Finally, Sect. 3 will provide transformer resonators and circuit to reduce bulky components and enhance gain-bandwidth of ICs. © Springer Nature Singapore Pte Ltd. 2021.Item Mm-wave cmos power amplifiers for 5g(2021) Gorre P.; Kumar R.; Song H.; Kumar S.The chapter discusses the basic elements in the design of mm-wave CMOS Power Amplifier (PA) for phased arrays integration, focusing the next-generation 5G mobile communication. Power Amplifier design metrics, along with implementation of beam-forming phased arrays to merge power over-the-air are discussed in brief. The explanation begins with CMOS unique advantages, real-time handset challenges, system-level constraints, and design challenges are conceptually demonstrated with the help of a basic single-stage transistor Power Amplifier. © Springer Nature Singapore Pte Ltd. 2021.Item Chitosan and its derivatives as potential materials for membrane technology(2015) Kumar R.; Isloor, A.M.Chitosan (CS), a biomaterial obtained via alkaline N-deacetylation of chitin, has recently attracted much attention from scientists across the globe. After cellulose, it is the second highest naturally occurring polymer on earth. It shows many excellent biological properties such as nontoxicity, biodegradability, antimicrobial activity, and immunological activity. As a membrane material, it has got excellent film-forming nature and hydrophilic in nature. Although the polymer backbone consists of hydrophilic functional groups, CS is normally insoluble in water and most of the common organic solvents. Chemical modification of CS is the best method to enhance its solubility at neutral pH or in organic solvents. So the obtained derivatives have got vast applications in the biomedical field as well as membrane technology. © 2015 by Taylor & Francis Group, LLC.