Technical Papers and Presentations

Greenhouses need heating supply most of the time of a year. Their heating demands are high and economical heating systems are very important for this kind of facilities. Horizontal ground source heat pump systems are getting more interest last years for being easy to apply and low ... Read More

Surface acoustic wave (SAW) devices are commonly used as wireless filters, resonators, and sensors. The confinement of acoustic energy near the surface of a piezoelectric substrate in a SAW sensor makes it highly sensitive for discerning surface perturbation. As sensors, SAW devices have ... Read More

We have modeled surface acoustic wave (SAW) devices composed of piezoelectric materials: aluminum nitride (AlN), lithium niobate (LiNbO3), and quartz. These materials are often used in RF filters and wireless sensors, which require temperature compensation for stability. Using our COMSOL ... Read More

Piezoresistive pressure sensors have received much attention over the years because of low cost, simple measurement techniques, etc. There is a challenge in design with respect to appropriate positioning, shape and temperature compensation. Different models of piezoresistive pressure ... Read More

This paper summarizes the main features of the on-interposer micro-thermoelectric sensors (hereafter denoted by µTES) derived by means of simulations done with COMSOL Multiphysics® software. µTES are thermal sensors based on the Seebeck effect which converts thermal flow into electrical ... Read More

A device for monitoring the oxygen consumption of cells has been developed, which consists of two parts; a cell culturing platform (CCP) and an oxygen sensing chip. The CCP possesses inlet and outlet pipes to direct the fluid under the test to the cell culturing chamber through the inlet ... Read More

Introduction: RFID system uses a Transponder and the near field communication (NFC) antenna and a matching circuit (Figure-1) in which at least latter two must be optimally designed for a higher efficiency. Typically, RFID antennas are flat inductive coils with 2 to 4 turns and are ... Read More

This paper reports the structural solid mechanic simulation of a MEMS out-of-plane platform that provides thermal and electrical isolation for a device built on it. When assemble, the platform lifted for approximately 400 μm above the substrate level. A mechanical stress analysis is then ... Read More

The good electrical, thermal, mechanical and chemical properties of solid organic dielectrics, such as PTFE, predestine them as good candidates for the electrical insulation of transport devices and systems. In the particular case of power converters involved in the future hybrid and ... Read More

Bolometers are used in a number of applications including night vision cameras, astronomy, and particle physics to measure the power of incident electromagnetic radiation. The general principle of operation is shown below: a strip of conducting material is exposed to incident ... Read More