A compact ultra-wide-band (UWB) band-pass filter (BPF) with dual notch bands is presented using novel defected ground structures (DGS). A couple of triangle-ring resonators with four open-stubs fed by a couple of inter-digital coupled structures is developed to meet the UWB requirement of a uniform 3.1GHz to 10.6GHz full-band transmission response. Dual notch bands are generated for filtering o...

Future wireless networks will use Universal Filtered Multicarrier (UFMC) as a new waveform modulation technique. The UFMC sensibly considers the sub-band filter specifications such order, and shape to combine key benefits of present generation waveforms while averting their disadvantages. Therefore, in UFMC-based systems, it is important pay attention how made. In this paper, configuration adap...

this paper introduces an indirect adaptive fuzzy sliding mode controller as a power system stabilizer for damping local and inter-area modes of oscillations of multi-machine power systems. this controller is designed based on the combination of sliding mode controller and the fuzzy logic systems. the fuzzy systems are used to approximate the unknown functions of power system model. generator sp...

The goal of this study is to understand inter-droplet cloud absorption in horizontally inhomogeneous clouds. In order to minimize the absorption by cloud drops, a spectral band around 0.94 μm with strong molecular and very weak liquid absorption has been chosen for detailed analysis. The 0.94 micron band has insignificant Rayleigh scattering and a large range of transmission (Figure 1). In othe...

Ground–state and dynamical properties of the 2D Holstein t–J model are examined by means of direct Lanczos diagonalization, using a truncation method of the phononic Hilbert space. The single– hole spectral function shows the formation of a narrow hole–polaron band as the electron–phonon coupling increases, where the polaronic band collapse is favoured by strong Coulomb correlations. In the two...

This paper reviews the development of advanced System-on-Package (SOP) architectures for the compact and low cost wireless RF wireless systems. A compact stacked patch antenna adopting soft-and-hard surface structures and cavity resonator filters using inter-resonance coupling mechanism for V-band applications are presented. A novel ultra-compact 3D integration technology is proposed and utiliz...

This paper deals with the dependence of second order nonlinear susceptibility and second harmonic generation (SHG) efficiency on the shape of CdS quantum dot. A relation has been found between the electronic structure and second order nonlinear susceptibility. The effective mass approximation has been used to find the energy levels. We have considered both intra band and inter band near resonan...

Optical properties of polymer capped gold nanoparticles of various sizes (diameter 3-6 nm) have been studied. We present a new scheme to extract size dependent variation of total dielectric function of gold nanoparticles from measured UV-Vis absorption data. The new scheme can also be used, in principle, for other related systems as well. We show how quantum effect, surface atomic co ordination...

In this paper, a simple method and structure to design a dual-band bandpass filter (BPF) by using a dual feeding structure and embedded uniform impedance resonator (UIR) is presented. In this structure, two passbands can be designed individually and several transmission zeros can be created to improve the band selectivity and stopband performance. The first passband is determined by the dual fe...

We theoretically propose and demonstrate experimentally a Coherent Direct Sequence OCDMA en/decoder for multi-channel WDM operation based on a single device. It presents a broadband spectral envelope and a periodic spectral pattern that can be employed for en/decoding multiple sub-bands simultaneously. Multi-channel operation is verified experimentally by means of Multi-Band Super Structured Fi...