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Communication Systems and Network Technologies (CSNT), 2012 International Conference on

Date 11-13 May 2012

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Displaying Results 1 - 25 of 223
  • [Front cover]

    Page(s): C1
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  • [Title page i]

    Page(s): i
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  • [Title page iii]

    Page(s): iii
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  • [Copyright notice]

    Page(s): iv
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  • Table of contents

    Page(s): v - xx
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  • Message from General Chairs

    Page(s): xxi - xxii
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  • Message from Technical Program Chairs

    Page(s): xxiii
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  • Conference Committees

    Page(s): xxiv
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  • Program Committees

    Page(s): xxv - xxvii
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  • Broadband Equilatral Triangular Microstrip Antenna for Wi-Max Application

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2243 KB) |  | HTML iconHTML  

    The aim of this paper is to design a micro strip antennas suitable for Wi-Max based application centered at 5.8 GHz. The antenna must operate within the unlicensed 5.8 GHz band. This band is currently being used for the IEEE 802.11c standard and other industrial, medical and scientific applications. A equilateral triangular micro strip antenna designed with slits, achieved 14.5 percent bandwidth and 3dBi directivity. The antenna covers the 5.8GHz band for Wi-Max with the bandwidth from 5.28GHz to 6 GHz. The antenna designed on FR4 substrate, that had a relative dielectric constant, εr = 4.4, a loss tangent tan δ = 0.009 and thickness, h of 1.59 mm. View full abstract»

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  • Fluid Frame Magneto-hydrodynamic Antenna

    Page(s): 5 - 9
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (859 KB) |  | HTML iconHTML  

    A rotating fluid frame Antenna consisting of conducting fluid (saline water) is radiating under controlled electric field and magnetic field conditions. Water molecules oscillate due to impact ionization inside the fluid and contribute to radiate energy. Resonant frequency depends on volume, type of fluid, shape of tube, chemical properties of fluid used, DC magnetic bias and electric bias conditions. The prototype model is presented with analytical and experimental solutions. Mathematical formulations have been set up in support of detailed study of MHD antenna. The radiation patterns and impedance in this class of antenna become function of conducting fluid velocity v, magnetic field intensity H and electric fields intensity E due to Centrifugal and Coriolis forces in MHD phenomenon. Here Poynting vector of the antenna is different from the conventional type because of additional velocity field is involved. View full abstract»

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  • Wave Propagation Characteristics of Dielectric Tube Waveguide Filled with Plasma

    Page(s): 10 - 14
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    Dielectric tube waveguide filled with plasma is an open waveguide structure that belongs to the class of surface wave propagation. In this paper, analytical theory of dielectric tube waveguide filled with plasma has been formulated and dispersion relation is numerically investigated for the guided mode propagation. This structure is analyzed for lower order hybrid modes with an aim to increase bandwidth for single mode propagation. Wave propagation characteristics show that it is possible to reconfigure the characteristics of waveguide for wide mono mode bandwidth by changing plasma density and cladding to core ratio. View full abstract»

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  • Compact Planar UWB Patch Antenna with Integrated Bandpass Filter & Band Notched Characteristics

    Page(s): 15 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (798 KB) |  | HTML iconHTML  

    In this paper, a band-notched planar Ultra wideband (UWB) patch antenna with integrated band pass filter for UWB systems is presented. It is designed on a dielectric substrate and fed by a 50 Ω micro strip line, antenna consists of a square slot patch with a vertical coupling strip monopole, and a partial ground plane and feeding line with band pass filter has been demonstrated to provide an ultra wide 10dB return loss bandwidth and insertion loss with satisfactory radiation properties. The parameters that affect the performance of the antenna in terms of its frequency domain characteristics are investigated. The proposed antenna is easy to integrate with microwave circuitry for low manufacturing cost. The proposed antenna has a compact structure and the total size is 15×14.5mm2. The antenna design is simulated on electromagnetic (EM) simulation software using FR-4 substrate with dielectric constant of 4.4 and thickness of 1.6 mm. The simulated antenna has operating frequency band of 3.098-10.61 GHz and show the band-notch characteristic in the UWB band to avoid interferences, which is caused by WLAN (5.15-5.825 GHz) and WiMAX (5.25-5.85 GHz) systems. The simulation result shows the close agreement. The antenna structure is flat, and its design is simple and straightforward geometrically small, hence embedded easily in wireless communication systems. View full abstract»

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  • Compact Dual Band Microstrip Loop Antenna Using Defective Ground Plane

    Page(s): 20 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1008 KB)  

    Present era of wireless communication thrust the need of miniaturization and multi-frequency operations to make the devices compact and affordable. To overcome the challenges of multi-frequency operation, in this paper a revised design is proposed for dual band microstrip antenna printed on RT-duroid substrate which can operate in two frequency bands with a single structure. To make the antenna compact the use of defective ground plane is justified as the size of the structure becomes almost one-third in comparison to the structure with full ground plain. The basic principal of its operation is the multiple resonance frequencies, the first frequency band occurs due to first resonance frequency and the second frequency band due to third resonance frequency which is the first odd harmonic of first resonance frequency. Due to the symmetry in the structure the even harmonics are cancelled out. The antenna is designed using 1.2 mm wide metal lines printed on a simple RT-duroid substrate (εr = 2.22) of thickness (H =15mils) it works like a coplanar waveguide micro-strip line of Z0 =50ohm, the structure is very simple rectangular loop printed as a microstrip line with characteristics impedance. Design is simulated using Electromagnetic simulator. We got exciting results of return loss is less than-30dB at both the resonance frequencies (1.5GHz & 4.2GHz). View full abstract»

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  • Design and Analysis of Electron Gun and Collector Test Module for 250kW CW, 5GHz Klystron

    Page(s): 23 - 26
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3859 KB) |  | HTML iconHTML  

    The present paper deals with the designing and simulation of electron gun, collector and electromagnet for 250kW CW, 5GHz klystron. The assembled structure named as Gun collector test module (GCTM) is also designed to validate the gun perveance and thermal design of collector. The electron beam optics is designed in TRAK 1D code and MAGIC2D code. Based on the above simulation, the engineering drawing is prepared and piece parts development of electron gun has been done successfully. The integration of collector and electron gun is designed using TRAK and validation of the design is done in MAGIC2D code. The results are well matched with the theoretical predictions. Using the simulated data, the engineering design of collector has been made and the fabrication of plain collector has been carried out successfully. The electromagnet is simulated using TRAK software to focus the beam properly The design analysis of complete Gun Collector Test Module is to be discussed in this paper. View full abstract»

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  • Novel Frequency Reconfigurable Microstrip Patch Antenna Based on a Square Slot for Wireless Devices

    Page(s): 27 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (894 KB) |  | HTML iconHTML  

    In this paper, a novel frequency reconfigurable antenna design and development is proposed for wireless devices. In the proposed design, a rectangular patch antenna with square slot using two PIN diodes at the centre frequency 10 GHz was designed and simulated frequency reconfiguration is achieved in the frequency range of 10-10.5 GHz and the measured results shows the same effect in the frequency range of 10.216-10.552 GHz. The frequency reconfiguration is carried out by switching the diodes on/off states. In the fabricated structure of proposed geometry the diodes are replaced by micro strip line for on-state as an ideal case. The antenna is designed on FR4 substrate (εr= 4.54) of thickness (H) 1.6 mm. The proposed structure was simulated by using the electromagnetic (EM) simulation software. The optimized structure was fabricated using microwave integrated circuit (MIC) techniques on same substrate. The return loss was measured using the Vector Network Analyzer. The simulated and measured return loss shows the close agreement. View full abstract»

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  • Bandwidth Enhancement of W Slot Microstrip Antenna Using Stacked Configuration

    Page(s): 31 - 34
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (809 KB) |  | HTML iconHTML  

    In this paper, bandwidth of microstrip antenna is increased by introducing a slot of W shape and using stacked configuration. The proposed W slot MSA is suitable for high speed WLANs applications. By using different approach of bandwidth enhancement such as stacked configuration, cutting slot and changing the position of the coaxial probe bandwidth equal to 25.78% is achieved. The antenna is fed by coaxial probe feeding technique. The designed antenna operates in the frequency range of 4.381GHz to 5.668GHz covering the WLAN frequency band of 5.15 GHz - 5.35 GHz. The antenna is designed using air as a dielectric substrate between the two layers and simulated on the Zeland IE3D software. View full abstract»

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  • Design of Double-F Metamaterial Structure for Enhancing Bandwidth of Patch Antenna with Negative μ and e

    Page(s): 35 - 39
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (866 KB) |  | HTML iconHTML  

    In this paper a rectangular micro strip patch antenna along with a metamaterial structure is proposed at a height of 3.2mm from the ground plane, which consists of a Double F Shaped Resonator (DFR) with Horizontal Rectangular Strips. This work is mainly focused on increasing the bandwidth of low profile micro strip patch antennas. The patch antenna along with the proposed metamaterial structure is designed to resonate at 1.45GHz. The impedance bandwidth of the patch antenna along with the proposed metamaterial structure is improved by 19.7MHz. All the simulation work is done by using CST-MWS Software. Double-Negative properties (Negative Permeability and Permittivity) of the proposed metamaterial structure have also been verified using Nicolson-Ross-Weir method (NRW). View full abstract»

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  • Rectangular Microstrip Patch Antenna with "Pentagonal Rings" Shaped Metamaterial Cover

    Page(s): 40 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (852 KB) |  | HTML iconHTML  

    A narrow band micro strip patch antenna with "Pentagonal Rings" shaped metamaterial cover is proposed and analyzed at a height of 3.2mm from the ground plane. The antenna along with the proposed metamaterial cover is designed to resonate at 2.31GHz frequency (in S-Band). Proposed metamaterial cover significantly reduces the return loss and increases the directivity of the antenna in comparison to rectangular micro strip patch antenna alone. The proposed antenna is suitable for application requiring low bandwidth space and reduced return loss, at 2.31GHz frequency. The scope of this paper is to design and simulate the proposed artificial structure with simultaneous negative permittivity and permeability or the so-called LH MTM. Nicolson-Ross-Weir approach has been used for verifying the double-negative properties of the proposed metamaterial cover. View full abstract»

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  • Stacked Microstrip Patch Antenna: Gain and Bandwidth Improvement, Effect of Patch Rotation

    Page(s): 45 - 48
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (805 KB) |  | HTML iconHTML  

    A rectangular micro strip patch antenna has been investigated and its performance has been analyzed with the aid of An soft HFSS. An additional rectangular conductive plate of comparable dimensions was placed above the patch in order to enhance the bandwidth. The package was used to analyse the effect of the top patch, in particular the variation of VSWR with two parameters, namely the distance between the two patches and the size of the upper patch. A bandwidth of 527 MHz for VSWR<;2 has been achieved for stacked rectangular patch designed to operate in the C-band. View full abstract»

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  • Design of a Modified E-shaped Dual Band Patch Antenna for Ku Band Application

    Page(s): 49 - 52
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (792 KB) |  | HTML iconHTML  

    This paper presents the design of a dual band micro strip antenna for Ku band application. The antenna is designed as a patch with two slots. The result shows that the return loss of-42dB and -43dB is achieved at resonant frequencies of 11.95GHz and 14.248 GHz respectively. Satisfactory radiation patterns have also been obtained through simulation. The maximum gain in frequency band is 7.2dB. The antenna is design and simulated by CST Microwave Studio software. View full abstract»

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  • Bandwidth Enhancement of Microstrip Patch Antenna Using Parasitic Patch Configuration

    Page(s): 53 - 57
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1034 KB) |  | HTML iconHTML  

    The author has simulated micro strip patch antenna with prime focus of increasing bandwidth using various techniques of probe feed, parasitic patch around the main patch and two layer of substrate. The simulation process has been done using HFSS (High Frequency Structural Simulator). In this paper, authors cover five aspects of micro strip antenna designs. The first is the analysis of single element narrowband rectangular micro strip antenna which operates at the central frequency of 2.4 GHz. The second/third aspect is the analysis and design of two gap/direct coupled parasitic patch along radiating edge of main patch and in forth/fifth aspect is the analysis and design of two layer of substrate on parasitic patch design. The properties of antenna such as bandwidth, S parameter, VSWR, Gain has been investigated and compared. View full abstract»

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  • Multi Frequency Rectangular Patch Mircostrip Antenna with T Shaped Slot for Ultra Wide Band (UWB) Communication Systems

    Page(s): 58 - 61
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    A Multi Frequency wide Band Rectangular Patch Micro strip Antenna with T Shaped Slot with shorting wall (RPMATSSSW) is designed on glass epoxy FR-4 substrate. The performance of this antenna is compared with that of a simple rectangular patch antenna. The simulated results for this antenna are optimized by varying position, length and width of T shaped slot and also by introducing two shorting wall. The results indicate that the designed structure resonate at various closely spaced frequencies (as shown in figure-4) which are use full for Ultra wide band (UWB) communication systems, which has been allocated IEEE 802.15.3a standard for specifies the frequency range 3.1GHz to 10.6GHz. The Modified antenna offers much improved bandwidth 76.71% at central resonance frequency 7.62GHz in comparison to a rectangular patch antenna (having band width 3.27%). The directivity of antenna also improves significantly at some of the resonance frequencies. View full abstract»

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  • Broad Band Aperture Coupled Microstrip Antenna with Dual Feed and Three Feed Technique

    Page(s): 62 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (843 KB) |  | HTML iconHTML  

    Micro strip patch antennas have been widely used in a various useful applications, due to their low weight and low profile, conformability, easy and cheap realization. The multi feeding techniques is used to increase the impedance bandwidth and to improve the radiation performance of micro strip antennas. In this paper, an attempt has been made to investigate proposed micro strip antenna structure i.e. the broadband aperture coupled Micro strip antenna, using dual feed (with and without E shaped patch and equal and unequal slot) and three feed technique. The simulation results of the broadband antenna and comparison of different types of antenna structure is described. HFSS are used for the simulation and design calculations of the micro strip antennas. The return loss, VSWR and radiation pattern are evaluated. Using HFSS simulation software proposed antenna is designed/simulated and optimized. The effectiveness of the proposed designs is confirmed through proper simulation results. View full abstract»

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  • E Shaped Patch Microstrip Antenna for WLAN Application Using Probe Feed and Aperture Feed

    Page(s): 66 - 70
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (844 KB) |  | HTML iconHTML  

    Microstrip patch antennas have been widely used in a various useful applications, due to their low weight and low profile, conformability, easy and cheap realization. A low profile patch antenna for WLAN application is proposed in this paper. This proposed antenna is made by using the probe feeding and aperture coupled feeding methods. This antenna is designed in order to improve the impedance bandwidth and obtain the circular polarization without using truncated corners in patch. The impedance bandwidth will be increased by making slots onto the patch. This unequal parallel slots patch antenna is the modified structure of E patch antenna and U slot Patch antenna. This patch antenna provides a bandwidth of around 16.4% with 1.5 VSWR. The simulation process has been done through high frequency structure simulator (HFSS). The properties of antenna such as bandwidth, S parameter, VSWR have been investigated. This paper also aims at comparing between different feeding methods. View full abstract»

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