Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/480466
Title: Modeling and analysis of smart material inspired ultra wideband reconfigurable antenna for cognitive radio applications
Researcher: Muthu, T R
Guide(s): Thenmozhi, A and Manimegalai
Keywords: Engineering and Technology
Engineering
Engineering Electrical and Electronic
smart material inspired
ultra wideband
cognitive radio applications
University: Anna University
Completed Date: 2022
Abstract: The Cognitive Radio is an emerging technology in wireless access, to significantly improve the utilization of radio spectrum by allowing access opportunistically. The goal of Cognitive Radio is to develop a system that can interact with its radio environment to adapt, discover, and exploit unused frequencies. Cognitive Radio is utilized to make use of unused or unlicensed channels. If a spectrum hole is discovered through this process, the channel is subsequently utilized for other wireless communication applications. newlineThis continuous (or discontinuous) sensing process on a large bandwidth imposes different constraints on the radio-frequency front-ends of the secondary user. More precisely, these requirements constrain strict issues on antenna design, low noise amplification, frequency synthesizers providing a carrier frequency from tens of megahertz to about 10GHz, mixing spurs, and spectrum sensing. Software-defined Cognitive Radio equipment requires broadband and adjustable antennas, multiband amplifiers, RF filters, broadband direct-conversion mixers, baseband filters, and ADCs and DACs. These RF components are expected to work across a wide frequency range. newlineIn Cognitive Radio (CR) applications, reconfigurable antennas are used to change fundamental features and efficiently employ available bandwidth, whereas MIMO antenna system-based reconfigurable antennas are to be used to meet the high data rate requirements for future wireless terminals. In general, Spectrum sensing is usually done using UWB antennas, while communication is done with frequency reconfigurable narrow band (NB) antennas. In Cognitive Radio applications the main purpose of employing the reconfigurable antennas is to reduce the cost and space for fast tuning. newline
Pagination: p.
URI: http://hdl.handle.net/10603/480466
Appears in Departments:Faculty of Information and Communication Engineering

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01_title.pdfAttached File115.5 kBAdobe PDFView/Open
02_prelim pages.pdf1.65 MBAdobe PDFView/Open
03_content.pdf166.11 kBAdobe PDFView/Open
04_abstract.pdf153.07 kBAdobe PDFView/Open
05_chapter 1.pdf193.69 kBAdobe PDFView/Open
06_chapter 2.pdf725.77 kBAdobe PDFView/Open
07_chapter 3.pdf1.03 MBAdobe PDFView/Open
08_chapter 4.pdf1.3 MBAdobe PDFView/Open
09_chapter 5.pdf516.22 kBAdobe PDFView/Open
10_annexures.pdf158.13 kBAdobe PDFView/Open
80_recommendation.pdf366.11 kBAdobe PDFView/Open
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