| Manuscript Title: | Higher Order SVD for Detection of Landmine Objects in Ground Penetrating Radar |
| Manuscript Id: | IJMOT-2019-6-1790 |
| Abstract: | In this paper, an algorithm is proposed to
reduce clutter signal due to reflection from the
ground surface in ground penetrating radar (GPR)
measurements. Tensor decomposition technique
has been applied to GPR, which has been used to
detect subsurface anti-personnel (AP) landmines.
Third-order data tensor has been decomposed by
tucker model. For this purpose higher-order
singular value decomposition (HOSVD) has been
applied. HOSVD is a generalization of the singular
value decomposition (SVD) to higher-order tensors
and plays an important role in various domains.
Unfortunately, this decomposition is
computationally demanding. Indeed, the HOSVD
of a third-order tensor involves the computation of
the SVD of three matrices, which are referred to as
modes or matrix unfoldings. The technique has
been experimentally evaluated and compared with
SVD algorithm using different non-metallic AP
landmines with different depths. The experimental
data have been collected by using frequency
stepped GPR system covering two ranges from 1
GHz to 4GHz and from 1.5 GHz to 20GHz, from
laboratory measurements. The test gives good
result, in agreement with the theory. The surface
reflection and the reflection within the earth have
been approximately removed for both data. |
| Authors: | Fawzy Abujarad |
| Submitted On: | 19-06-2019 |
| Pages: | 380-389 |
| Action: | [Full Paper]
No. of Downloads: 58 |
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| Manuscript Title: | A Design of Microstrip MIMO Antenna Using Ladder Shape Parasitic Element for Low Mutual Coupling |
| Manuscript Id: | IJMOT-2019-7-1810 |
| Abstract: | This paper introduces a Microstrip
MIMO antenna with a ladder shape parasitic
element that helps to reduce mutual coupling. In
this research work a parasitic ladder shape element
has been applied in between the antenna elements
in which each patch size is (13x17.4) mm2. In order
to control the coupling the distance between the
elements has been adjusted accordingly. The
proposed MIMO antenna operates at 2.28GHz and
2.72GHz resonant frequencies for wireless
applications. The purpose of introducing parasitic
element is to generate a cancellation field which
enhances the isolation developed in proposed
MIMO antenna. Above fulfillment is done by using
ladder shaped parasitic element of size (43 x 6)
mm2 built using FR-4 epoxy with a relative
permittivity of 4.4 and with thickness of 1.6mm.
The Design was simulated in CST with above
mentioned parameters. Proposed MIMO antenna
is found to have a low Return Loss i.e. -32dB and
-22.25dB respectively at two resonant frequencies.
To validate the simulation results, the antenna is
experimentally tested in the laboratory. Finally a
comparison of the results by changing the ground
plane has been presented in the paper. |
| Authors: | Pooja Pandey, P.K. Singhal |
| Submitted On: | 31-07-2019 |
| Pages: | 390-396 |
| Action: | [Full Paper]
No. of Downloads: 88 |
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| Manuscript Title: | An X-band 5W GaAs pHEMT Power Amplifier MMIC with High Efficiency |
| Manuscript Id: | IJMOT-2019-8-1811 |
| Abstract: | In this paper, we demonstrated a high efficient power amplifier monolithic microwave integrated circuit (MMIC) for X-band satellite communication and radar applications. The used device technology relies on 0.25 µm GaAs pseudomorphic high electron mobility transistor (pHEMT) process. The fabricated high efficient power amplifier MMIC has linear gain of over 22 dB and saturated output power of over 37 dBm in the application frequency range of 7.5 GHz ~ 8.5 GHz. Power added efficiency (PAE) shows good performance over 44 % and output third order intercept point (OIP3) is over 43dBm. The measured values are consistent with the design values, and exhibits good performance. |
| Authors: | Sung-Chan Kim, Ki-Burm Ahn, Keun-Kwan Ryu |
| Submitted On: | 01-08-2019 |
| Pages: | 397-401 |
| Action: | [Full Paper]
No. of Downloads: 36 |
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| Manuscript Title: | Back to Back Pi-Shaped slot with SIW Cavity-backed Antenna for 60GHz Applications |
| Manuscript Id: | IJMOT-2019-8-1813 |
| Abstract: | In this article, SIW slot antenna backed with a cavity is proposed for 60 GHz applications and shape of the slot is used in this design is back to back pi shape. The size of the proposed design is 13 x 10.7 x 0.381 mm8 and loaded with RT-Duroid (Rogers substrate) with dielectric constant of 2.2. The proposed design as produces three resonant frequencies those are 57.47GHz, 60GHz and 63.8GHz and ranging from 57GHz to 64.6GHz. The designing, fabricating, tested and compared with simulation results. The fabricated prototype is covers the entire band of 60GHz that is 57-64GHz (7GHz bandwidth) and also observed good radiation pattern at 60GHz. The equivalent model is introduced finally to match the VSWR, S11 of proposed design and equivalent is analyzed with help of matrix laboratory (MATLAB). |
| Authors: | Nanda Kumar, T Shanmugannatham |
| Submitted On: | 02-08-2019 |
| Pages: | 402-408 |
| Action: | [Full Paper]
No. of Downloads: 64 |
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| Manuscript Title: | Design and Implementation of Tri-Band Microstrip Antenna |
| Manuscript Id: | IJMOT-2019-8-1819 |
| Abstract: | Multi-band antennas are becoming vital for wireless systems. This paper proposes a tri-band microstrip patch antenna using slots with h-shaped. The operating frequencies cover the GSM900, DCS1800 and the 2.4 GHz bands. The optimization of the antenna dimensions was obtained by using available tools in the CST microwave studio software. A prototype antenna was fabricated and tested. From the simulated and measured results, the antenna operational frequencies were achieved. It is also found that the gain and the return losses of the antenna were better than other letter-shaped antennas reported in the literature. |
| Authors: | Jalel Chebil, Mohamed Hadi Habaebi, Omar Noori, Sheroz Khan, Md. Rafiqul Islam |
| Submitted On: | 18-08-2019 |
| Pages: | 409-414 |
| Action: | [Full Paper]
No. of Downloads: 59 |
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| Manuscript Title: | A Miniaturized Heptagonal Patch Antenna Loaded With 8-Shaped Unit Cell DGS in Conjunction with E-Shaped Slot for Wireless Applications |
| Manuscript Id: | IJMOT-2019-9-1823 |
| Abstract: | A miniaturized Defected Ground Structure (DGS) antenna (radiating area of only 188.38mm2) for WLAN/C-band application is presented. Miniaturization in the designed configuration is accomplished by two cascaded 8-shaped unit cell DGS and multiband operations are accomplished by utilizing an E-shaped slot in conjunction with DGS. The proposed novel DGS configuration helps in achieving a miniaturization of about 82.3% in radiating area and 84% in volume corresponding to lower resonance of the conventional antenna. The antenna has S11<-10dB bandwidth of 4.48% centered at 2 GHz (WLAN), 2.076% centered at 4.45GHz (C-band) and 3.65% centered at 5.2 GHz (WLAN). The antenna shows stable radiation pattern and good impedance matching at the targeted frequencies. |
| Authors: | Tanweer Ali, Darshana P N, Subhash Gowda, Manohara Pai M M |
| Submitted On: | 05-09-2019 |
| Pages: | 415-422 |
| Action: | [Full Paper]
No. of Downloads: 41 |
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| Manuscript Title: | Flexible Liquid Crystal Polymer based Conformal Fractal antenna for Internet of Vehicles (IoV) Applications |
| Manuscript Id: | IJMOT-2019-9-1833 |
| Abstract: | In this article, a fractal structured flexible antenna is proposed for conformal vehicular communication applications. The proposed antenna is designed and fabricated on Rogers ULTRALAM 3850 liquid crystal polymer substrate of relative permittivity 2.9 and occupies a footprint of 40 x 30 x 0.1mm3. The fractal structure is obtained through etching several circular cuts in a recursive manner which enhanced the impedance bandwidth of the antenna. The operating band characteristics with respect to the planar and flexible mode of the proposed antenna are studied and analyzed. The antenna operates in 2.30-7.89 GHz, 8.97-10.42 GHz and 10.76-extended beyond 12GHz. The conformal placement is also studied by placing the proposed flexible antenna on side-wing mirror of the vehicle and the antenna characteristics are analyzed in virtual simulation environment. The real-time received signal strength measurements of prototyped antenna parameters are performed for the validation of the proposed design for the conformal application on the vehicle body. |
| Authors: | T Anilkumar, B T P Madhav, Yepuri Spoorthi Hawanika, M Venkateswara Rao, B Prudhvi Nadh |
| Submitted On: | 23-09-2019 |
| Pages: | 423-430 |
| Action: | [Full Paper]
No. of Downloads: 56 |
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| Manuscript Title: | Multi-Ports Extraction Technique for Microwave ?Bandpass Filter Optimization |
| Manuscript Id: | IJMOT-2019-9-1843 |
| Abstract: | In this paper a new filter adjustment strategy based on AYSYS-HFSS simulations is proposed. The method relies on the introduction of additional internal ports into the filter design for the extraction of the multi-port admittance matrix (Y-Matrix). The main advantage is that the filter parameters, namely the resonant frequency of each resonator, the coupling coefficients and the external quality factors Qs are directly accessible via the multi-port Y-Matrix. The extracted values will allow through a simple adjustment procedure to approach the specified data of the synthesis of the filter. An example of a folded bandpass coaxial filter with a four pole Chebyshev characteristics is chosen to demonstrate the validity of the proposed technique which can be adapted to other types of filters as well as to other characteristics. |
| Authors: | Bouhmidi Rachid, Bouras Bouhafs, Chetioui Mohammed |
| Submitted On: | 29-09-2019 |
| Pages: | 431-439 |
| Action: | [Full Paper]
No. of Downloads: 42 |
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| Manuscript Title: | Spatial spectrum of scattered electromagnetic waves in the conductive anisotropic magnetized plasmaa |
| Manuscript Id: | IJMOT-2019-11-11853 |
| Abstract: | Second order statistical moments of
scattered electromagnetic waves in the turbulent
anisotropic conductive magnetized plasma are
considered using the modify smooth perturbation
method. Polarization coefficients and diffraction
effect are taken into account. Broadening,
displacement of the spatial power spectrum,
scintillation level and the “Double-humped Effect”
are investigated analytically and numerically for
different anisotropy factors and inclination angles
characterizing large-scale ionospheric plasmonic
structures. It was shown that longitudinal
conductivity and homogeneous ambient external
magnetic field (in the main plane) have substantial
influence on the statistical characteristics of
scattered radiation in the ionospheric F-region.
Increasing characteristics spatial scale of
ionospheric large-scale electron density
irregularities the spatial spectrum broadens, shift
of the spectral maximum have opposite signs in
the main and perpendicular planes. The obtained
results allow to solve the reverse problem having
application in the transionospheric
communication and climate change. Numerical
calculations are carried out using the experimental
data. |
| Authors: | G.V. Jandieri, A. Ishimaru, B. Rawat, N. Mchedlishvili |
| Submitted On: | 07-11-2019 |
| Pages: | 440-449 |
| Action: | [Full Paper]
No. of Downloads: 38 |
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| Manuscript Title: | Analysis of Material Losses in Magneto Optic Thin Films for Variable MUX/DEMUX Applications in Optical Communications |
| Manuscript Id: | IJMOT-2019-4-21754 |
| Abstract: | This paper investigates the losses
associated with ferrite thin films with various gold
nanoparticles concentrations, to see if they are
suitable for use as a MUX/DEMUX in Wide Area
Network (WAN) optical communications. This
paper studied the boundary condition of HE11 and
LP01 modes, Absorption Losses, and the
transmittance of the thin films. The propagation
constant and the Power Mode were analyzed in this
study. The result for both these are in line with
previous research and are promising for use in the
desired application. The Absorption Losses are
associated with the resistance of the thin films and
their effect on the current drop in the thin films.
The absorption coefficients are high due to the
properties of the thin films. However, due to the
thickness of the thin films their effect is minimal.
The calculated output power of optical signals
propagating through the thin films ranges from 9.9
to 9.98 mW with an input power of 10 mW. The
transmittance is used to determine how much
power of the optical source propagates through the
thin films. The transmittance of the thin films was
extremely small ranging from 37 to 82 percent for
parallel components of the waves and 42 to 82
percent for perpendicular components of the
waves, which is suitable for optical
communications. |
| Authors: | David Coisson, Banmali Rawat |
| Submitted On: | 23-04-2019 |
| Pages: | 450-459 |
| Action: | [Full Paper]
No. of Downloads: 24 |
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| Manuscript Title: | Compensation of 8x2 Bpbs Optic Non-Linear Effects using DCF and Repeater |
| Manuscript Id: | IJMOT-2019-7-1798 |
| Abstract: | Four Wave Mixing (FWM) is one of the optical non-Linear effect which cause a generating of new signals at receiver like the inter modulation effect in telecommunication systems. Practically, the individual interactions in the fields within a dielectric medium field may explain this process. Two different compensation techniques are used in this work, Dispersion Compensation Fiber (DCF) and Repeater to make a reduction in the linear and non-Liner effects, especially in case of unequal channel spacing WDM system.
The results have taken in form of quality-factor versus bit error rate (BER), for optisystem V.7 software using 8-channels in two cases; equal and unequal channel spacing. The Q-Factor of equal WDM system with DCF at 0 dBm signal power is 45.5 while 59 and 35 in the case of unequal channel spacing using DCF and repeater respectively.
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| Authors: | Yasseen Sadoon Atiya, Saif Hussam Abdulwahed, Hayder Fadhil Abdulsada |
| Submitted On: | 02-07-2019 |
| Pages: | 460-467 |
| Action: | [Full Paper]
No. of Downloads: 35 |
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| Manuscript Title: | Fabrication of Low Cost Planar Waveguide Power Splitter Based on Tin (IV) Oxide Nanoparticles with Laser Engraving Method |
| Manuscript Id: | IJMOT-2019-8-1820 |
| Abstract: | We demonstrate optical power splitter using SnO2 nanoparticle as core material in double Y-branch waveguide geometry. SnO2 is a nonlinear optical material that have been largely used in various photonics application like LED, optical logic gate, optical sensors, and saturable absorber. The SnO2 nanoparticle is injected to optical waveguide that patterned using laser engraving method. The material for substrate is acrylic and for cladding is MMA hence satisfy total internal reflection requirement. The performance of optical laser splitter is analyzed in different coupling length from 6 mm, 8 mm, and 10 mm with laser input wavelength is 632.8 nm (He-Ne laser). The optimal splitting for producing equally power in the output waveguide is 10 mm length coupling. Therefore, the proposed optical waveguide provided low cost and simple fabrication method to realize optical power divider. The success of this study can be miniaturized further to nanoscale region using SnO2 nanowire structure. |
| Authors: | Asnawi, Nur Abdillah Siddiq, Melania Suweni Muntini, Yono Hadi Pramono |
| Submitted On: | 21-08-2019 |
| Pages: | 468-474 |
| Action: | [Full Paper]
No. of Downloads: 51 |
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