| Section A: Microwave Technology and Related Topics |
| Manuscript Title: Frequency- and Time-Domain Simulation of Microstrip Squares
by Using 2D-FDTD Electromagnetic Analyses |
| Manuscript Id: IJMOT-2010-1-101 |
| Abstract: The time- and frequency-domain
electromagnetic analyses of various microstrip
squares were performed in order to know how the
high-speed interconnects and the quarter-wave
impedance-matching elements behave when used
on printed circuit boards and integrated circuits.
Both the characteristic impedance and physical
length properties of these squares, seen from a
steady-state in-frequency perspective are
analyzed. Also, the step propagation
characteristics in a single microstrip line, seen
from a transient-behavior in-time standpoint, are
investigated. A general equation expressing the
propagation in the microstrip as a function of
both, the phase velocity in the microstrip itself and
the phase velocity in the dielectric, is used as the
lengthening factor to compensate the shift in the
resonant frequency. |
| Authors: Alejandro Dueñas Jiménez |
Category: Microwave Technology Submitted On: 12/1/2009 Full Text [PDF] Pg.Nos: 1-6
|
| Manuscript Title: Waveguides and Guided-wave Devices for THz: an
Emerging Technology |
| Manuscript Id: IJMOT-2010-1-105 |
| Abstract: The propagation properties for a wide range of
waveguides operating in the terahertz (THz) region are
presented. A rigorous full-vectorial modal solution approach,
based on the finite element method, has been developed to
calculate the mode field profiles, spot-sizes, effective indices,
and the cutoff condition of the fundamental and higher order
modes to identify the single mode operation ranges. Here both
dielectric and surface plasmon modes have been considered to
identify low loss operation of such waveguides. In addition to
this, material, leakage and bending losses are also presented
for photonic crystal fibers considering their use in the THz
frequency region. |
| Authors: B. M. A. Rahman, N. Kejalakshmy, A. Agrawal, C. Themistos, H. Tanvir and K. T. V. Grattan |
Category: Microwave Technology Submitted On: 12/1/2009 Full Text [PDF] Pg.Nos: 7-15
|
| Manuscript Title: Microwave Photonics: Photonic Generation of Microwave
and Millimeter-wave Signals |
| Manuscript Id: IJMOT-2010-1-106 |
| Abstract: Techniques to generate microwave and
millimeter-wave (mm-wave) signals in the optical
domain will be reviewed, with an emphasis on the
techniques for microwave generation based on
heterodyne of two phase correlated wavelengths. |
| Authors: Jianping Yao |
Category: Microwave Technology Submitted On: 12/1/2009 Full Text [PDF] Pg.Nos: 16-21
|
| Manuscript Title: Proof to Verify the Observation Points in FDTD-MoL
Simulations of Microstrip Straight and Meander Lines |
| Manuscript Id: IJMOT-2010-1-107 |
| Abstract: This paper presents a procedure to find
the correct observation points for obtaining good
convergence in electromagnetic simulations of
microstrip straight and sinuous lines. The
technique is based on the application of the Fast
Fourier Transform (FFT) to the space-time data
obtained from a mixed use of the Finite-Difference
Time-Domain Method and the Method of Lines
(FDTD-MoL). The procedure assures correct
simulation results provided the representative
traces of the circuit can be discriminated from the
rest of curves given by the FFT transformation of
the longitudinal electric field component z E . The
observation points are found at values
corresponding to normalized time steps. As a first
approximation the FFT is applied to the z E before
the boundary conditions are introduced, in order
to observe the plain pulse flight. |
| Authors: J. M. Villegas González, C. A. Bonilla Barragán, A. Dueñas Jiménez and A. G. Andrade Reátiga |
Category: Microwave Technology Submitted On: 10/19/2009 Full Text [PDF] Pg.Nos: 22-26
|
|
| Section B: Optical Technology and Related Topics |
| Manuscript Title: Near-Infrared (NIR) Spectroscopic Investigation of Novel Bionanoparticles by using MOEMS Spectrometer |
| Manuscript Id: IJMOT-2010-1-102 |
| Abstract: Near-Infrared (NIR) spectroscopy is one of the vibrational spectroscopic techniques which has been utilized to characterize the structural information of biological samples by means of associated “molecular fingerprints”. Recent advances in the optical technology have enabled us to utilize this method for the investigation of various properties of nano-sized biomaterials such as biopolymers or bionanoparticles. In this study, a compact, cost-effective, portable, field-deployable, dual-detector micro-mirror NIR spectrometer based on micro-opto-electro-mechanical systems (MOEMS) technology has been employed for the NIR spectroscopic investigations of a novel kind of biomaterials originating from self-forming synthesized lipids. This miniaturized spectrometer is capable to operate in the wide spectral range of 9000-4800 cm-1 (~1100-2100 nm) which is relevant to the vibrational bands corresponding to the biological samples. The NIR spectra of such biopolymers are dominated by overtones and combinations bands originating from C-H, O-H and C=O vibrational modes. Furthermore, various characteristics properties including Beer’s law has been tested for different polar solvents and found that this law is valid for the studied biopolymers at the low concentration regime. |
| Authors: R. K. Bista, R. F. Bruch, A. M. Covington, B. S. Rawat |
Topic: Optical Technology Submitted On: 10/7/2009 Full Text [PDF] Pg.Nos: 27-32
|
| Manuscript Title: Semi-analytical Approach for Microstructured Optical Fibers Using a Model of Layered Cylindrical Arrays
Microstructured Optical Fibers |
| Manuscript Id: IJMOT-2010-1-103 |
| Abstract: A rigorous semi-analytical approach for
specific microstructured optical fibers, which are
formed of layered cylindrical arrays of circular
rods symmetrically distributed on each concentric
cylindrical layer, is presented for both of scalarwave
formulation and full-wave formulation. The
method uses the T-matrix of a single circular rod,
the reflection and transmission matrices for a
cylindrical array, and the generalized reflection
and transmission matrices of a cylindrically
layered system. |
| Authors: Kiyotoshi Yasumoto, Vakhtang Jandieri |
Topic: Optical Technology Submitted On: 10/26/2009 Full Text [PDF] Pg.Nos: 33-39
|
| Manuscript Title: Analysis of Freely Moving Soliton Interaction with Localized Defects for Long Distance Optical Fiber Communications |
| Manuscript Id: IJMOT-2010-1-104 |
| Abstract: The interaction of a fiber Bragg grating moving soliton with local defects has been thoroughly analyzed. The stability of trapped solitons has also been discussed. The main finding reveals that when the defect is very strong, and the soliton is very heavy, the interaction may combine attractive and repulsive features. In this case, the energy of the incoming soliton is split into three parts: one is trapped at the defect, while the rest of the energy is scattered in both the forward and backward directions. If the velocity and ? of the soliton are not too large, the soliton is captured by the defect, in accordance with the fact the effective potential of the interaction between them is attractive. When the soliton is “heavy”, with ? = 0.6p, the character of the interaction reverses from attraction to repulsion. In this case, the soliton bounces back. However, if the defect is weak, regardless of whether the interaction is attractive or repulsive, heavy solitons can pass through the defect. If it is strong, and the soliton is heavy or fast enough, the collision may split the soliton in three parts. Some energy is trapped by the defect to form a pinned soliton, while large amounts of energy scattered away may generate secondary solitons, transmitted and reflected types with significant amplitude |
| Authors: Shivaji Pokala, Banmali S. Rawat, Syam S. Challa |
Topic: Optical Technology Submitted On: 12/4/2009 Full Text [PDF] Pg.Nos: 40-46
|
| Manuscript Title: Subpicosecond Optical Pulse Processing
via Fiber Dispersion Management |
| Manuscript Id: IJMOT-2010-1-108 |
| Abstract: The fibers with dispersion varying along length have important applications in optical signal processing such as high-quality optical pulse compression, coherent continuum generation, nonlinear dynamic dispersion compensation and other applications. This paper describes the basic idea and experimental results. |
| Authors: Alexej Sysoliatin,Andrey Konyukhov, Leonid Melnikov,Vladimir Stasyuk |
Topic: Optical Technology Submitted On: 2/15/2010 Full Text [PDF] Pg.Nos: 47-51
|
