| Section A: Microwave Technology and Related Topics |
| Manuscript Title: A New Regressor for Calculation of the Bandwidth of Rectangular Microstrip Antenna |
| Manuscript Id: IJMOT-2008-9-397 |
| Abstract: Microstrip antennas (MSAs) offer a number of unique advantages over other types of antennas. In MSA designs, it is important to determine the bandwidth of the antenna accurately because the bandwidth is a critical parameter of a MSA. For calculating the bandwidth of the rectangular microstrip antennas with thin and thick substrates, we present a new method based on the support vector regression (SVR) and Fuzzy C-Mean (FCM). The support vector regression (SVR) is a statistical learning method that generates input-output mapping functions from a set of training data. The bandwidth results obtained by using SVR and new proposed SVR are in excellent agreement with the experimental results available in the literature. |
| Authors: Hadi sadoghi yazdi, Mehri sadoghi yazdi and Abedin Vahedian |
Category: Microwave Technology Submitted On: 9/16/2008 Full Text [PDF] Pg.Nos: 328-337
|
| Manuscript Title: REDUCED SIZE MONOPOLE ANTENNA FOR LAND MINE DETECTION |
| Manuscript Id: IJMOT-2009-2-428 |
| Abstract: The paper presents the design of a printed monopole antenna for landmine detection. The characteristics of antenna are obtained for inset fed H-shape monopole configuration for several cases. The proposed antenna exhibits a bandwidth of 49MHz with a reduced area of around 66% with respect to rectangular and circular patch antennas. Further, a larger ground plane is found to improve the return loss of the antenna and broaden the bandwidth. Finally, a prototype model of reduced size monopole antenna is fabricated and tested for Ground Penetration Radar (GPR) application. The experimental results are compared with simulation results and are found to be in good agreement. |
| Authors: Ritesh Kumar Badhai, Nisha Gupta |
Category: Microwave Technology Submitted On: 2/27/2009 Full Text [PDF] Pg.Nos: 338-343
|
| Manuscript Title: Testing the Applicability of a Hybrid FDTD-MoL
Technique on the Simulation of Passive Microstrip Paths |
| Manuscript Id: IJMOT-2009-4-437 |
| Abstract: The pertinence of a hybrid FDTD-MoL
electromagnetic simulation method for the study of
microstrip paths used as delay lines in RFID, and
connection tracks in high-speed interconnects is
considered. A simple one-loop delay line is
analyzed by taking into consideration aspects as
the reflected-to-incident wave ratio, employed to
define simulation time points, and the change or
variation of the typical microstrip input
parameters, which are commonly fixed or
preassigned by the manufacturers of the microstrip
materials and are tightly involved in the
calculation of the propagation speed. |
| Authors: J. M. Villegas González, A. G. Andrade Reatiga, and A. Dueñas Jiménez |
Category: Microwave Technology Submitted On: 4/1/2009 Full Text [PDF] Pg.Nos: 344-348
|
| Manuscript Title: A Quick Estimate of the Ohmic Quality Factor of a Corrugated Wall Circular Cavity |
| Manuscript Id: IJMOT-2009-7-446 |
| Abstract: A simple electromagnetic technique to estimate quickly the ohmic quality factor of a corrugated wall circular cavity was proposed by dividing the cavity into a numbers of cells of circular cross-section. Although, the technique is general, the sinusoidal radius profile was taken to demonstrate the results of the proposed technique. The result of the present analysis was compared to obtain ~ 4 % variation with those obtained using commercially available simulation softwares, CST Microwave Studio and Ansoft HFSS, however, in very less time than these simulation tools. It was observed that the ohmic quality factor initially increases, and after obtaining a maximum, it starts decreasing with increasing mean radius of the cavity in the sinusoidal radius profile. The value of the maximum ohmic quality factor decreases and shifts towards a lower value of mean radius of the radius profile with increasing amplitude of the radius profile and increasing frequency of operation. Increasing the length of the cavity in the sinusoidal profile produces the alternate maximum and minimum of the ohmic quality factor within the range of length up to few wavelengths (~10llll), and afterwards the ohmic quality factor converges to a constant value which shows that the ohmic quality factor is independent of periodicity of the sinusoidal radius profile for a length of cavity greater than 10lambda. |
| Authors: Vishal Kesari |
Category: Microwave Technology Submitted On: 7/18/2009 Full Text [PDF] Pg.Nos: 349-357
|
| Manuscript Title: A Rigorous Study of Some Planar Structures With Ferrite
Magnetized Longitudinally by Modified LSBR Method |
| Manuscript Id: IJMOT-2009-7-457 |
| Abstract: In this paper, we propose a variant of the
least squares boundary residual (LSBR) method
which takes into account the singularities of the
electromagnetic field in the metal-dielectric edge
due to the existence of the Gibbs phenomenon. A
systematic weighting functions are employed in this
method permitting to obtain accurate and efficient
numerical results with an accelerated convergence.
We present the extension of the modified LSBR
method to the study of the dispersion of the planar
structures partially full of ferrite magnetised
longitudinally by a static magnetic field H 0
,
containing conductors of negligible thickness in the
interfaces. We modelise the strutures of the
microstrip and finlines by a proposed general
configuration. |
| Authors: Hedi SAKLI, Hafedh BENZINA, Taoufik AGUILI, Jun. Wu. TAO |
Category: Microwave Technology Submitted On: 7/29/2009 Full Text [PDF] Pg.Nos: 358-367
|
|
| Section B: Optical Technology and Related Topics |
| Manuscript Title: Analysis of Optical Soliton Propagation in Birefringent Fibers |
| Manuscript Id: IJMOT-2008-5-304 |
| Abstract: Polarization mode dispersion (PMD) is a serious impairment in high-bit-rate optical soliton communication systems. This paper presents a detailed investigation of soliton pulse propagation in randomly varying birefringent optical fibers and how solitons broaden in presence of third order dispersion. Fiber birefringence is the physical origin of PMD. It is found that the third-order dispersion in the fibers is strong enough to cause the pulse distortion. In this paper we propose optical soliton propagation in birefringent single mode fibers with a new stochastic model in which the stochastically varying birefringence and third order dispersion are considered. |
| Authors: P Muthu Chidambara Nathan, N Kalyanasundaram and Krishnam raju M |
Topic: Optical Technology Submitted On: 5/1/2008 Full Text [PDF] Pg.Nos: 368-373
|
| Manuscript Title: Designing of refractive index of NaCl solution using SPR |
| Manuscript Id: IJMOT-2009-2-425 |
| Abstract: In presented paper we summarize some results obtained by testing of recently prepared mathematical model for solution and application of inverse optical scattering problem. The computa-tional scheme is based on the matrix model of multilayer and implemented in Matlab-code which uses the built in Nelder-Mead algorithm for non-linear regression. The used reflectometric data have been obtained in laboratories of Department of Physics at VŠB-Technical University of Ostrava. The refraction index of NaCl solution has been fitted by different degrees of salinity for wave-lengths 604 nm, 612 nm and 633 nm. The computed results enlarge existing data published elsewhere. |
| Authors: Petr Otipka, Jaroslav Vlček and Michal Lesňák |
Topic: Optical Technology Submitted On: 2/20/2009 Full Text [PDF] Pg.Nos: 374-379
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