Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/5756
Title: Investigations on broadband planar monopole and slot radiators and their suitability for UWB applications
Researcher: Das Krishna, Deepti
Guide(s): Aanandan C K
Keywords: Electronics
WLANs
WPANs
Elliptical monopole
Koch fractal slot
Wide band slot
Inverted cone monopole
Upload Date: 21-Dec-2012
University: Cochin University of Science and Technology
Completed Date: September, 2010
Abstract: In recent years, there is a visible trend for products/services which demand seamless integration of cellular networks, WLANs and WPANs. This is a strong indication for the inclusion of high speed short range wireless technology in future applications. In this context UWB radio has a significant role to play as an extension/complement to existing cellular/access technology. In the present work, we have investigated two major types of wide band planar antennas: Monopole and Slot. Four novel compact broadband antennas, suitable for poratble applications, are designed and characterized, namely 1. Elliptical monopole 2. Inverted cone monopole 3. Koch fractal slot 4. Wide band slot. The performance of these designs have been studied using standard simulation tools used in industry/academia and they have been experimentally verified. Antenna design guidelines are also deduced by accounting the resonances in each structure. The performance of these designs have been studied using standard simulation tools used in industry/academia and they have been experimentally verified. Antenna design guidelines are also deduced by accounting the resonances in each structure. In addition to having compact sized, high efficiency and broad bandwidth antennas, one of the major criterion in the design of impulse-UWB systems have been the transmission of narrow band pulses with minimum distortion. The key challenge is not only to design a broad band antenna with constant and stable gain but to maintain a flat group delay or linear phase response in the frequency domain or excellent transient response in time domain. One of the major contributions of the thesis lies in the analysis of the frequency and time-domain response of the designed UWB antennas to confirm their suitability for portable pulsed-UWB systems. Techniques to avoid narrowband interference by engraving narrow slot resonators on the antenna is also proposed and their effect on a nano-second pulse have been investigated.
Pagination: xxiii, 195p.
URI: http://hdl.handle.net/10603/5756
Appears in Departments:Department of Electronics

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01_title.pdfAttached File90.18 kBAdobe PDFView/Open
02_contents.pdf135.84 kBAdobe PDFView/Open
03_chapter 1.pdf780.28 kBAdobe PDFView/Open
04_chapter 2.pdf849.81 kBAdobe PDFView/Open
05_chapter 3.pdf1.68 MBAdobe PDFView/Open
06_chapter 4.pdf3.31 MBAdobe PDFView/Open
07_chapter 5.pdf2.27 MBAdobe PDFView/Open
08_chapter 6.pdf1.81 MBAdobe PDFView/Open
09_chapter 7.pdf592.42 kBAdobe PDFView/Open
10_references.pdf647.28 kBAdobe PDFView/Open
11_summary.pdf474.3 kBAdobe PDFView/Open
12_samenvatting.pdf505.03 kBAdobe PDFView/Open
13_publications.pdf62.06 kBAdobe PDFView/Open
14_acknowledgements.pdf13.25 MBAdobe PDFView/Open
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