1,721,084 research outputs found
On the Key-Role of EM Skins in Building a Smart Electromagnetic Environment
No full textThe rapidly emerging Smart Electromagnetic Environment (SEME) paradigm is expected to revolutionize the design and the deployment of future wireless communications systems. In such a framework, electromagnetic skins (EMSs) will play a key-role to enable an almost-arbitrary “tailoring” of the complex EM interactions arising within a wireless propagation scenario. This invited talk is aimed at providing a showcase of some of the most recent developments in this field as well as an overview of the envisaged future trends according to the authors' vision
Development of a Passive Skin for Glass Building Surfaces in a Smart Electromagnetic Environment
No full textElectromagnetic metasurfaces (MTS), also referred to as Reconfigurable Intelligent Surfaces (RIS) in their dynamic form, have the potential to actively shape the wireless communication environment, particularly in 5G and 6G systems. They help overcome significant path loss issues, especially at millimeter-wave (mmWave) frequencies within the FR2 band. Our study focuses on MTS from a fabrication standpoint, highlighting the microfabrication methods employed to create a static and passive MTS prototype on a 6′′-optically transparent wafer substrate. This MTS design is intended for integration onto large glass surfaces commonly found in urban settings
A CAD system for developing chemical sensor-based microsystems with an ISFET-CMOS compatible technology
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POSFET Devices Based Tactile Sensing Arrays
No full textThis work presents and experimentally evaluates novel POSFET (Piezoelectric Oxide Semiconductor Field Effect Transistor) devices based tactile sensing arrays. The arrays, primarily developed for the robotic applications, consist of 5 × 5 POSFET touch sensing devices or taxels. The POSFET touch sensing devices are developed by spin coating piezoelectric polymer P(VDF-TrFE) film on the gate area of MOS devices and polarizing the film in situ. To detect contact events, the taxels utilize the contact forces induced change in the polarization level (and hence change in the induced channel current) of piezoelectric polymer. Both, individual taxels and the array are designed to match spatio-temporal performance of the human fingertips. Experimental results demonstrate that the POSFET tactile sensing arrays presented here are able to detect complex dynamic contact events such as rolling of an object
Synthesis of Modular Electromagnetic Skins for Multiple Blind Spot Coverage in Urban Scenarios
No full textThe importance of the SEME paradigm is emerging with ever-increasing strength as a founding stone for next-generation wireless communications. Limits on the possibility of installation of new base stations (BTSs) for future standards and the amount of power that they can radiate have pushed the telecommunication community towards the study and development of innovative solutions. Among them, the possibility of exploiting the characteristics of the environment itself as an enabling factor (as opposed to being viewed as an obstacle, as in the communication technologies of the past) is envisaged [1]-[5]. This work aims at presenting and preliminary analysing the performance of a SEME-enabling technology, in which the architecture of a modular and passive EMS [6] is designed to reflect the EM signal incoming from a nearby BTS towards blind areas inside the scenario, where coverage would otherwise be insufficient
Bioelectrochemical signal monitoring of in-vitro cultured cells by means of an automated microsystem based on solid state sensor-array
No full textIn the last decade, fundamental advances in whole cell based sensors and microsystems have established the extracellular acidification rate monitoring: of cell Cultures as an important indicator of the global cellular metabolism. Innovative approaches adopting advanced integrated sensor array-based microsystems represent an emerging technique with numerous biomedical applications. This paper reports a cell-based microsystem, for multisite monitoring of the physiological state of cell populations. The functional components of the microsystem are an ion sensitive field effect transistor (ISFET) array-based sensor chip and a CMOS integrated circuit for signal conditioning and sensor signal multiplexing. In order to validate the microsystem capabilities for in-vitro toxicity screening applications, preliminary experimental measurements with Cheratinocytes, and CHO cells are presented. Variations in the acidification rate, imputable to the inhibitory effect of the drug on the metabolic cell activity have been monitored and cell viability during long term measurements has been also demonstrated
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