Antennas for information super skyways institute of physics publishing feb 2004
[...]... the concept of wireless or radio transmission of information is not new Its history dates back to the Antennas for Information Super Sky-Ways 2 1800s with associated scientific postulations posted in the 1700s It is an engineered art based on the science of electricity and magnetism It was realised as a technology by Marconi through the elegant equations of Maxwell, the grand proposals of Hertz and... Antenna for 2.4 GHZ ISM band 7.6.5 PC-card antennas for 2.4 GHz ISM ISM band applications 7.6.6 Dual PIFA configurations 7.6.7 Dual-band antenna for 2.4 GHz and 5.7 GHz indoor wireless systems 7.6.8 Smart antennas for Bluetooth applications 7.6.9 Polarisation-switched antennas for indoor applications 7.6.10 Implementation of switched-polarisation antenna system 7.6.11 Circularly-polarised antennas for. .. Circumference-spacing chart of helical antennas Helical antennas in wireless applications Land mobile/satellite mobile compatible helix antenna Bifilar/quadrifilar helical antennas Normal mode helical antennas for portable phones Helix antennas used in maritime and aeronautical systems 201 202 203 203 204 204 Spiral Antennas 4.7.1 Equiangular antennas 4.7.2 Log-periodic antennas 4.7.3 Self-complementary antennas 4.7.4... the information source/sink and at the transreceive units, including the channel 4 1.2 Antennas for Information Super Sky-Ways A TECHNOLOGY OF SERVICES “UNTIED BY WIRES” 1.2.1 A historical perspective and state -of- the-art wireless systems Wireless telecommunication is a “top-notch” technology of modern times Cellular telephones, paging, mobile radios, and personal communication systems (PCS) are, for. .. both standards in 1993 The TDMA allows multiple user information to be placed in distinct time-slots supported by a carrier frequency At any given receiver, the desired information 8 Antennas for Information Super Sky-Ways residing in the appropriate time-slots (ear-marked to that receiver) are identified and selected The other, impertinent time-slot information are rejected The CDMA refers to a digital... loops 4.5.6 Radiation efficiency of a loop antenna 4.5.7 Loop antennas in wireless communication systems 4.5.8 Loop plus dipole antenna 179 182 182 Part I 4.2 4.6 Helical Antennas 4.6.1 Transmission modes of helices 4.6.2 Radiation modes of helices 4.6.3 Axial ratio and conditions for circular polarisation for helix 4.6.4 Feed arrangements and physical forms of helical antennas xviii 185 186 188 188... Reflection-specified propagation model 107 107 108 3.8 Reflection of EM Wave at a Lossy Surface 110 3.9 EM Wave Bouncing at Roof-Tops of Buildings 111 3.10 Reflections of TM and TE Wave 111 3.11 Height-Gain for Antennas 112 3.12 Reflection of Circularly Polarised EM Waves 113 3.13 Diffraction of EM Waves in Wireless Communication Transmissions 113 3.14 Scattering of EM Waves in Mobile Communication Scenario 114 3.15... still known as a “good conductor” of electricity for transporting message in the form of dots and dashes of electrical pulses This basic copper conductor in most part remains, even after a century and a half, as the vital physical link of telecommunications networks Changes, of course, have been made on the geometry and structural aspects of copper wirelines; and, a variety of copper-wire pairs twisted,... introduced The information transfer in the realm of electrical communications has also presumed a new physical medium in the last few decades that allows the flow of light (in lieu of the conventional electricity) carrying the message being communicated The optical fibre is a contemporary and competing physical transport medium for information transfer that runs parallel to the legacy of copper wire... “the cutting edge” aspects of wireless antenna systems and as a guide to the technical staff involved in the design, fabrication and testing of wireless communication antennas Wireless communication antennas are an exclusive subset of the traditional electromagnetic radiators These antennas should be viewed for their applications tailored to meet specific performance aspects of wireless/mobile communication . y0 w0 h0" alt="" Antennas for Information Super Skyways: An Exposition on Outdoor and Indoor Wireless Antennas ELECTRONIC & ELECTRICAL ENGINEERING RESEARCH STUDIES ANTENNAS SERIES Series. Dielectric Resonator Antennas * Edited by K. M. Luk and K. W. Leung 12. Antennas for Information Super Skyways: An Exposition on Outdoor and Indoor Wireless Antennas P. S. Neelakanta. P. S. Neelakanta and R. Chatterjee * Forthcoming Antennas for Information Super Skyways: An Exposition on Outdoor and Indoor Wireless Antennas Perambur S. Neelakanta