| Section A: Microwave Technology and Related Topics |
| Manuscript Title: Microwave Phase Shifter with Electromagnetic Signal Coupling in Silicon Bulk Technology |
| Manuscript Id: IJMOT-2006-4-21 |
| Abstract: This contribution presents a Distributed MEMS Transmission Line (DMTL) phase shifter for the 24 GHz ISM band fabricated in silicon bulk technology. Using this technology enables the suspension of all capacitive loads on one movable plate and therefore allows wide range analog and homogeneous tuning. |
| Authors: Stefan Leidich,Sebastian Voigt, Steffen Kurth, Karla Hiller, Thomas Gessner |
Category: Microwave Technology Submitted On: 4/26/2006 Full Text [PDF] Pg.Nos: 1-9
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| Manuscript Title: Design of Left-Handed Metamaterials Using Single Resonant and Double Resonant Structures |
| Manuscript Id: IJMOT-2006-5-32 |
| Abstract: Single resonant frequency structure consisting of a circular spiral inductor loaded by a cylindrical rod and double resonant frequency structure consisting of a circular spiral inductor loaded by a cylindrical rod coupled with two rectangular split ring resonators are newly proposed to achieve double negative metamaterials (DNM) properties. |
| Authors: Le-Wei Li,Wei Xu, Hai-Ying Yao, Zhi-Ning Chen and Qun Wu |
Category: Microwave Technology Submitted On: 5/5/2006 Full Text [PDF] Pg.Nos: 10-16
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| Manuscript Title: UWB Monopole Antenna with a Top-hat Sleeve |
| Manuscript Id: IJMOT-2006-5-33 |
| Abstract: This paper presents a top-hat sleeve monopole antenna for ultra-wideband (UWB) applications. A modal expansion technique used in cylindrical coordinate system is applied to study the impedance and radiation characteristics of the antenna. The design demonstrates an extraordinarily broad bandwidth of up to 105% (2.65-7.95GHz), which covers the lower UWB band of 3.1-4.8 GHz very well. |
| Authors: Zhi Ning Chen,Wei Qiao and Ke Wu |
Category: Microwave Technology Submitted On: 5/5/2006 Full Text [PDF] Pg.Nos: 17-27
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| Manuscript Title: Improved Performance of DGS Based LPF Using Anisotropic Substrate |
| Manuscript Id: IJMOT-2006-5-40 |
| Abstract: Low pass filters (LPF) with planar defected ground structure (DGS) for microstrip line on anisotropic substrate are designed and fabricated. An improvement in the sharpness factor using anisotropic substrate for a two element DGS based LPF and a periodic 1-D five element based LPF has been reported. |
| Authors: Sachin Singh,Banmali S. Rawat |
Category: Microwave Technology Submitted On: 5/9/2006 Full Text [PDF] Pg.Nos: 28-34
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| Manuscript Title: A New Wideband Unidirectional Antenna Element |
| Manuscript Id: IJMOT-2006-5-41 |
| Abstract: A novel wideband unidirectional antenna composed of a planar electric dipole and a shorted patch antenna is presented. The antenna is excited by a -shaped strip feed line. A wide impedance bandwidth of 43.8% (SWR1.5) from the frequency of 1.85 to 2.89 GHz is achieved. Stable radiation pattern with low cross-polarization, low backlobe radiation, nearly identical E-and H-plane patterns and an antenna gain of ~8dBi is found across the entire operating bandwidth. |
| Authors: Kwai-Man LUK,Hang WONG |
Category: Microwave Technology Submitted On: 6/27/2006 Full Text [PDF] Pg.Nos: 35-44
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| Manuscript Title: Excitation of microwave vortices by ferrite disks: the near-field and far-field excitation problems |
| Manuscript Id: IJMOT-2006-5-61 |
| Abstract: A small FMR ferrite disk strongly perturbs the cavity field. Graphical representation of the Poynting vector shows that due to the vortex structure the absorption cross-section of a ferrite particle can be much bigger than its geometrical cross-section. Spectral properties of magnetic oscillations in a ferrite disk show unique vortex structures for MS-wave functions. |
| Authors: E.O. Kamenetskii,M. Sigalov and R. Shavit |
Category: Microwave Technology Submitted On: 5/10/2006 Full Text [PDF] Pg.Nos: 45-52
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| Manuscript Title: Microstrip Antennas Integrated with Horn Antennas |
| Manuscript Id: IJMOT-2006-5-63 |
| Abstract: Novel high gain antenna configurations by integrating the suspended square microstrip antennas inside the pyramidal horn and suspended circular microstrip antennas inside the conical horn are proposed. These antennas provide flexibility in the bandwidth and the polarization, with higher gain. |
| Authors: Girish Kumar,K. P. Ray, Amit A. Deshmukh |
Category: Microwave Technology Submitted On: 5/10/2006 Full Text [PDF] Pg.Nos: 53-57
|
| Manuscript Title: Trends in High-Efficiency Power Amplifier Design Solutions |
| Manuscript Id: IJMOT-2006-5-64 |
| Abstract: In this contribution, research activities and
trends in the field of RF and microwave power
amplifiers design are discussed. Strategies for high
efficiency are focused and the results attained presented,
showing state-of-the-art power amplifier design,
utilising GaAs or GaN technologies. Some “evergreen”
design solutions, recently rediscovered for advanced
communication systems, as the Doherty and Envelope
Tracking approaches, are revisited. |
| Authors: Ernesto Limiti,Paolo Colantonio, Franco Giannini |
Category: Microwave Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 58-67
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| Manuscript Title: The application of evolutionary neural networks to micrwave device modeling |
| Manuscript Id: IJMOT-2006-5-68 |
| Abstract: This paper examines the use of evolutionary techniques in evolving neural network models for microwave devices and circuits. First we present, for contrast, the use of the better-knownback-propagation algorithm for the same task. We apply this algorithm
to developing a model of an SiGe HBT transistor which is then used to simulate a cascode amplifier. The structured genetic algorithm is then presented and used for S-parameter and DC models of HBT transistor and a model of an HEMT power amplifier. The construction of a single-stage amplifier using the HBT model and a cascode amplifier using the HEMT model is described. We comment on the disadvantages and advantages of both methods. Demonstrations of the use of the models for CAD applications are also presented.
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| Authors: Sheila Prasad,K. Deh, K. Munshi, P. Vempada, E. Soenmez, H. Schumacher, P. Colantonio, G. Rocco |
Category: Microwave Technology Submitted On: 6/30/2006 Full Text [PDF] Pg.Nos: 68-74
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| Manuscript Title: Electromagnetic Bandgap Structures Formed by Circular Posts of Magnetized Ferrite in Rectangular Waveguide |
| Manuscript Id: IJMOT-2006-6-164 |
| Abstract: Electromagnetic bandgap (EBG) structures formed by circular posts of magnetized ferrite stacked in a rectangular waveguide is analyzed using the image theory, the lattice sums technique, and the generalized reflection and transmission matrices. The frequency response controllable by the applied magnetic field are discussed for the incidence of the fundamental TE mode. |
| Authors: Kiyotoshi Yasumoto,Hongting Jia, Bhaskar Gupta |
Category: Microwave Technology Submitted On: 6/19/2006 Full Text [PDF] Pg.Nos: 75-81
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| Manuscript Title: Design of Components for a Compact UWB Microwave Imaging System |
| Manuscript Id: IJMOT-2006-6-171 |
| Abstract: The paper describes the design of hybrid circuits and antennas for a compact ultra wideband (UWB) microwave imaging system aimed at operation from 3.1 to 10.6GHz. The design of these components is accomplished with the use of full-wave electromagnetic field analysis and design software. The components are developed and experimentally tested. They show good electrical performances over the specified band and thus they are ready to be incorporated in the proposed configurations of an UWB microwave imaging system. |
| Authors: Marek Bialkowski,Amin Abbosh, Hing Kan, Wee-Chang Khor |
Category: Microwave Technology Submitted On: 6/21/2006 Full Text [PDF] Pg.Nos: 82-89
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| Manuscript Title: Frequency domain-based extraction method of quasi-static nonlinear state functions from large-signal microwave measurements |
| Manuscript Id: IJMOT-2006-6-175 |
| Abstract: A novel method to extract one-port quasi-static nonlinear constitutive relations directly from large-signal microwave vector measurements is presented. The method is based on a frequency domain-based formulation that takes into account the fact that even and odd components of the waveforms originated by a memoryless nonlinear state function under periodic excitation are not independent. Full details to demonstrate this key relation are given. A distinctive characteristic of the method is that it directly provides the nonlinear element’s charge-voltage state function, without needing to perform the integration of the capacitance-voltage function, as required by time domain-based methods. Real waveform measurements of the gate Schottky diode of a passive HEMT were used to evaluate the performance of the method. The obtained results demonstrate the mathematical validity of the method and its robustness to errors in the measurements. |
| Authors: C. Camacho-Peńalosa,T.M. Martín-Guerrero, J.D. Bańos-Polglase |
Category: Microwave Technology Submitted On: 6/22/2006 Full Text [PDF] Pg.Nos: 90-99
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| Manuscript Title: A Card-type, Fan-Shaped Antenna for Wide Band Operation |
| Manuscript Id: IJMOT-2006-6-185 |
| Abstract: This paper presents a card-type antenna, which is composed of a small fan-shaped plate and a ground plate. The analysis reveals that this antenna has a low VSWR characteristic over an extremely wide frequency range of 2.9 GHz to more than 10.6 GHz, with gains between –1.7 dBi and +2.6 dBi. A quasi-omnidirectional radiation pattern is obtained around the longitudinal axis of the fan-shaped plate. |
| Authors: Hisamatsu Nakano,Takaaki Kondo, Junji Yamauchi |
Category: Microwave Technology Submitted On: 6/29/2006 Full Text [PDF] Pg.Nos: 100-105
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| Manuscript Title: Enhancement in Performance of sub-100nm MOSFETs With Gate Stack Architecture |
| Manuscript Id: IJMOT-2006-6-193 |
| Abstract: A 2-D analysis for different gate stack
dielectric structured MOSFETs with carrier
quantization effects is presented using Green’s
function for solving Poisson’s equation. Explicit
results for potential distribution, threshold voltage
and drain current are presented. Based on
extensive simulation and developed formulation, it
is found that using double-layer gate stack
structures with low-k dielectric as spacer material
can well confine the electric fields within the
channel. Comparison of the results thus obtained is
done with simulated results to justify the analysis. |
| Authors: R S Gupta,Tina Mangla, Amit Sehgal, Mridula Gupta |
Category: Microwave Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 106-113
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|
| Section B: Optical Technology and Related Topics |
| Manuscript Title: High-Speed Optical Modulators and Photonic Sideband Management |
| Manuscript Id: IJMOT-2006-5-34 |
| Abstract: Most important application of optical modulators is conversion of electric signals into lightwave signals. This is indispensable to high-speed optical links. However, recently, we need new functions such as optical label processing at nodes, signal timing control to prevent packet collision, etc. In this paper, we describe advanced optical modulators designed for the photonic sideband management techniques, such as resonant-type modulators for effective optical sideband generation, reciprocating optical modulators for photonic millimeter-wave generation, and optical frequency-shift-keying modulators for optical packet labeling. |
| Authors: Tetsuya Kawanishi |
Topic: Optical Technology Submitted On: 6/29/2006 Full Text [PDF] Pg.Nos: 114-120
|
| Manuscript Title: Stochastic Parameter Optimizers for Optical Nanostructures |
| Manuscript Id: IJMOT-2006-5-38 |
| Abstract: The most important stochastic optimizers for real model parameter optimization, i.e., random search, genetic algorithms, evolutionary strategies, particle swarm optimization, simulated annealing, and downhill simplex algorithms with random restart are outlined, compared, and applied to a sharp 90 degree optical waveguide bend. In order to obtain a good visualization of the search strategies, a very simple problem with a 2D search space is considered. Following this simple example, the dimension of the search space is increased. The results demonstrate the main properties of the various algorithms when applied to optical nanostructures or similar problems where the fitness evaluation is time-consuming. |
| Authors: Christian Hafner,Cui Xudong and Ruediger Vahldieck |
Topic: Optical Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 121-132
|
| Manuscript Title: Highly accurate modelling of generalized defect modes in photonic crystals |
| Manuscript Id: IJMOT-2006-5-42 |
| Abstract: We present an exact theory for modelling generalized defect modes in 2D photonic crystals with a truly infinite cladding. We build on our fictitious source superposition method for point defects and describe an elegant extension for arbitrary defects. Results for 2D and 3D that demonstrate the method’s accuracy, efficiency, and ability to handle the difficult case of extended modes are presented. |
| Authors: Lindsay C Botten,Kokou B Dossou, Stewart Wilcox, Ross C McPhedran, C Martijn de Sterke, Nicolae A Nicorovici, Ara A Asatryan |
Topic: Optical Technology Submitted On: 5/16/2006 Full Text [PDF] Pg.Nos: 133-145
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| Manuscript Title: Spectral Super-Resolution by Understanding Superposition Principle and Detecting Processes |
| Manuscript Id: IJMOT-2006-5-46 |
| Abstract: We present analytical and experimental results demonstrating a conceptual break through on how to overcome the fundamental time-frequency bandwidth limit (or spectral super-resolution) for a light pulse in traditional and heterodyne spectrometry. This can be achieved either by a de-convolution process suggested by analytical method or by heterodyne method, which we demonstrate. |
| Authors: Chandrasekhar Roychoudhuri,Moncef Tayahi |
Topic: Optical Technology Submitted On: 6/27/2006 Full Text [PDF] Pg.Nos: 146-153
|
| Manuscript Title: Finite element solutions of metal-clad dielectric waveguides at optical and THz frequencies |
| Manuscript Id: IJMOT-2006-5-50 |
| Abstract: Finite element analysis, based on the full-vectorial H-field formulation and incorporating the perturbation technique, is used to calculate the complex propagation characteristics of metal-coated dielectric waveguides for both the optical and terahertz frequency ranges. The propagation and attenuation characteristics of the surface plasmon modes at the metal/dielectric interfaces are presented. |
| Authors: Prof. B M A Rahman,Dr Chris Themistos, Dr M Rajarajan, Prof. K T V Grattan |
Topic: Optical Technology Submitted On: 5/22/2006 Full Text [PDF] Pg.Nos: 154-167
|
| Manuscript Title: Total Internal Reflection Ellipsometry with Transition Layer |
| Manuscript Id: IJMOT-2006-5-55 |
| Abstract: The influence of garnet film located on contact surface of coupling prism, different values of prism refractive indices, and induced anisotropy of grating lamellas are discussed in detail. The simulations of the ellipsometric response under internal reflection for different geometrical and material configurations are presented. |
| Authors: Jaroslav Vlček,Jaromír Pištora, Ondřej Bárta, Tomuo Yamaguchi |
Topic: Optical Technology Submitted On: 5/15/2006 Full Text [PDF] Pg.Nos: 168-172
|
| Manuscript Title: Raman Amplification Properties of Photonic Crystal Fibers |
| Manuscript Id: IJMOT-2006-5-56 |
| Abstract: We address Raman amplification properties of photonic crystal fibers (PCFs). The effect of the structural variations on the performance of the PCF-based Raman amplifier is extensively studied.Maximum gain of 9dB and lowest DRB of -53dB can be obtained for the PCF with the lowest loss of 0.37dB/km at 1.55m wavelength. |
| Authors: Shailendra Varshney,K. Saitoh, N.J. Florous, and M. Koshiba |
Topic: Optical Technology Submitted On: 5/15/2006 Full Text [PDF] Pg.Nos: 173-180
|
| Manuscript Title: Energy Transfer and Message Filtering in Chaos Communications Using Injection locked Laser Diodes |
| Manuscript Id: IJMOT-2006-5-59 |
| Abstract: Message-signal filtering in optical chaos communications using injection-locked laser diodes (LDs) are theoretically studied In the driven response of injection-locked LDs, the driving force is supplied to drive field and carrier with energy transfer. The driving-energy transfer occurs for sinusoidal signals masked by chaos, resulting in message signal filtering in the chaos communications. |
| Authors: Atsushi Murakami,K. Alan Shore |
Topic: Optical Technology Submitted On: 6/27/2006 Full Text [PDF] Pg.Nos: 181-187
|
| Manuscript Title: Differences in 10.7 Gb/s Duobinary and Non-Return-to-Zero Transmission over 1000 km of SSMF |
| Manuscript Id: IJMOT-2006-5-67 |
| Abstract: Transmission performance of duobinary modulation by using a low pass filter format over 1000 km of SSMF is investigated along with that of standard Non Return to Zero. The required OSNR at BER =1x10-3 for both modulation format is shown to be ~12 dB after 1000 km with the respective optimal residual dispersion conditions. Duobinary also shows a wider dispersion tolerance window than NRZ. |
| Authors: Moncef Tayahi,Banmali Rawat |
Topic: Optical Technology Submitted On: 6/27/2006 Full Text [PDF] Pg.Nos: 188-191
|
| Manuscript Title: Ultra-Wide-Angle Beam Propagation Method Based on High-Order Finite-Difference |
| Manuscript Id: IJMOT-2006-6-179 |
| Abstract: The true fourth-order finite-difference scheme is incorporated into an ultra wide-angle beam propagation method (BPM) based on Padé series expansion. A comprehensive study for the accuracy of various finite-difference (FD) formulas in literature for the wide-angle beam propagation method is presented. It is demonstrated that the new high-order FD wide-angle BPM is highly accurate for efficient simulation of wide-angle field propagation and is superior to the other FD schemes in the case of high index contrast and/or ultra wide-angle propagation. |
| Authors: Hua Zhang,Wei-Ping Huang, Ning-Ning Feng |
Topic: Optical Technology Submitted On: 6/23/2006 Full Text [PDF] Pg.Nos: 192-203
|
| Manuscript Title: Millimeter-Wave Photonic Techniques: Part I-Photonic Generation of Millimeter-Wave Signals |
| Manuscript Id: IJMOT-2006-6-188 |
| Abstract: Broadband, low loss and cost-effective transmission capability of optical fiber links has led to an ever-increasing interest in their use for the generation and distribution of millimeter-wave (mm-wave) signals for broadband wireless access networks and sensor networks. In this paper, some new techniques in photonic generation of mm-wave signals for radio-over-fiber (RoF) network applications are reviewed, which include phase locking of two ultra-quiet lasers, mm-wave source generation using external modulation techniques. |
| Authors: Jianping Yao,Raman Kashyap, Xiupu Zhang, and Ke Wu |
Topic: Optical Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 204-214
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| Manuscript Title: Millimeter-Wave Photonic Techniques: Part II-All Optical Microwave Signal Processing |
| Manuscript Id: IJMOT-2006-6-190 |
| Abstract: The distribution of broadband microwave and millimeter-wave (mm-wave) signals over optical fiber with the advantageous features such as broad bandwidth, low loss and immunity to electromagnetic interference has led to an ever-increasing interest in their use in broadband wireless access networks and broadband sensor networks. For radio over fiber (RoF) networks, it is desirable that distributed signals be processed directly in the optical domain to avoid additional optical to electrical (O/E) and electrical to optical (E/O) conversions. In this paper, three new techniques to process microwave and mm-wave signals in the optical domain, including all-optical microwave bandpass filtering and all-optical microwave mixing, are discussed. |
| Authors: Jianping Yao,Raman Kashyap, Xiupu Zhang, and Ke Wu |
Topic: Optical Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 215-226
|
| Manuscript Title: Millimeter-Wave Photonic Techniques: Part III- Modulation and Demodulation Schemes and System Integration Based on Substrate Integrated Circuits |
| Manuscript Id: IJMOT-2006-6-191 |
| Abstract: The techniques to implement radio over fiber (RoF) systems using optical subcarrier modulation (SCM) and dense wavelength division multiplexing (DWDM) are reviewed, which include the techniques of SCM, millimeter-wave (mm-wave) generation and reception at base stations, and optical multiplexing/demultiplexing. The impact of system nonlinear distortions and their suppression are also reviewed. In addition, the integration of the future mm-wave photonic systems based on substrate integrated circuits (SICs) is discussed. Some examples of system on substrate or on chip are provided. |
| Authors: Raman Kashyap, Xiupu Zhang, and Ke Wu |
Topic: Optical Technology Submitted On: 6/28/2006 Full Text [PDF] Pg.Nos: 227-237
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