A novel approach for optimizing the optical performance of the broadband tap coupler Chih-Ming Hsu a , Chao-Ton Su b & Dirac Liao c a Department of Business Administration , Minghsin University of Science and Technology , Hsinchu, Taiwan, ROC b Department of Industrial Engineering and Management , National Chiao Tung University , Hsinchu, Taiwan, ROC c Browave Corporation , Hsinchu, Taiwan, ROC...

Existence of a surface wave along the boundary between the semi-infinite materials, one of which is a free-space and the other is a material with either negative permeability or negative permittivity, is theoretically investigated. Surface waves exist in only limited combination of negative and positive signs of the material parameters. In addition, by analyzing the surface wave in a finite-thi...

Ultra wideband components have been developed using SIW technology. The various newly developed components include a GCPW transition, Y and T-junctions. The GCPW transition covers over 10GHz bandwidth with less than 0.4 dB insertion loss. The optimized T and Y-junctions have relatively wide bandwidths of greater than 40% that have less than 0.6 dB insertion loss. The developed transition was ut...

Cheating in multisecret sharing is considered. Multisecret sharing is defined by a mapping F : GF (p) −→ GF (p) that provides a generic model. In this model, we propose nonlinear multisecret sharing that is immune against cheaters. Two cheating strategies are considered. In the first one, all cheaters always submit their invalid shares and they collectively know their own valid shares. In the s...

Résumé. Dans cet article nous proposons une extension du langage fonctionnel Caml Light appelé ACCL (pour A Concurrent Caml Light) dont le but est de combiner les paradigmes de programmation impérative, fonctionnelle, de concurrence et de distribution dans un seul langage de programmation. Pour l’extension concurrente de Caml Light nous proposons quelques primitives avec une sémantique très sim...

Résumé. Les entrepôts de données et l’analyse en ligne OLAP (On-line Analysis Processing) présentent des solutions reconnues et efficaces pour le processus d’aide à la décision. Notamment l’analyse en ligne, grâce aux opérateurs OLAP, permet de naviguer et de visualiser des données représentées dans un cube multidimensionnel. Mais lorsque les données ou les objets à analyser sont complexes, il ...

A novel energy efficient heterogeneous networks (HetNet) deployment scheme is proposed in this paper. Unlike the traditional deployment, we consider the scenario with picocell eNodeB (PeNB) at the edge instead of under the umbrella of macrocells in HetNet. In the novel scheme, one PeNB with directional antennas is deployed on the border of neighbor macrocells which is equivalent to a combiner o...

The goal of the research reported here was the development of a circuitbased modeling procedure for both the passive and active components of a quasi-optical power combiner. Contributions include the development of a multi-port equivalent circuit of a multi-element quasi-optical power combiner. Excellent agreement with experimental results was obtained. Mount independent techniques "were also d...

Large cross section multimode waveguides have been realized in SU-8 using selective polymerization. SU-8 is a negative photoresist, which has shown good optical properties and it is mechanically and chemically stable. The fabricated waveguides have very smooth sidewalls and exhibit low optical losses. The fabrication method is simple and potentially very cost effective. N x N and 1 x N multimod...