Design of compact microstrip bandpass filter using square DMS slots for Wi-Fi and bluetooth applications

This paper presents the design of a compact bandpass filter based on two identical rectangular resonators and is implemented on microstrip technology for Wi-Fi and bluetoothapplications. To reduce the size of the filter, the defected microstrip structure (DMS) technique is proposed. This technique consists of etching slots in the rectangular resonator, which results in a change in the line properties and increase of the effective inductance and capacitance. This feature is used for miniaturization. The designed filter has a compact size (6.82x8.3) mm² with a low insertion loss of -0.1 dB and a good return loss of -36 dB. The simulation results are realized using the (computer simulation technology) CST Microwave software

Design and optimization of a new compact 2.4 GHz-bandpass filter using DGS technique and U-shaped resonators for WLAN applications

The objective of this work is the study, the design and the optimization of an innovative structure of a network of coupled copper metal lines deposited on the upper surface of a R04003 type substrate of height 0.813 with a ground deformed by slots (DGS). This structure is designed in an optimal configuration for use in the design of narrowband bandpass filter for wireless communication systems (WLAN), the aim of use the defected ground structure is to remove the unwanted harmonics in the rejection band, the simulation results obtained from this structure using CST software show a very high selectivity of the designed filter, a very low level of losses (less than-0.45 dB) with a size overall size of 43.5x34.3 mm

Developpement d'une methode de reconstruction 3D du tronc d'un scoliotique par imagerie stereoscopique

Le but du travail présenté dans ce papier est d'apporter une aide à l'orthésiste durant les phases de conception et de fabrication des corsets de scoliose, et de permettre à l'équipe médicale d'avoir un meilleur suivi de l'évolution de la scoliose. La méthode repose sur 3 phases : acquisition dès données relatives au tronc du patient par une méthode stéréoscopique, reconstruction 3D et corrections, et fabrication avec une machine à commande numérique. De plus la méthode stéréoscopique peu coûteuse permet de mieux suivre l'évolution de la scoliose par des prises de données régulières