DESIGN OF SUBSTRATE INTEGRATED WAVEGUIDE H- PLANE HORN ANTENNA ON A PTFE SUBSTRATE

Rectangular dielectric loaded substrate integrated waveguide (SIW) H-plane horn antenna, operating at 26 GHz has been proposed in this paper. For the simulations, a substrate of thickness 3.2mm and a dielectric material of Poly Tetra Fluoro Ethylene (PTFE) has been used. The size of antenna was reduced and a dielectric slab was loaded in front of the horn. This resulted in the increase of gain and also narrow beamwidths in the E- plane and H- plane. A comparison between two horn antennas, one without dielectric loading and one with dielectric loading has been presented in this paper

Study of Ethylene Vinyl Acetate (EVA) Films used in Photovoltaic Modules

Encapsulant material is an important component of the Photovoltaic (PV) modules. Generally Ethylene Vinyl Acetate (EVA) is used as the encapsulant material in PV modules due to its low lost and other properties like high adhesion to different module materials, high volume resistivity, high optical transparency and adequate mechanical strength to accommodate stresses induced by thermal expansion of glass and solar cells. The purpose of this investigation is to compare two different grades of virgin EVA films by various techniques like Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, Thermal gravimetric analysis (TGA), UV-Vis spectroscopy and Broad band dielectric spectrometry