Now showing items 221-225 of 225
Analysis of optimal matching between a dc motor and photovoltaic modules via dc-dc power converters
Due to the nonlinear behavior of the photovoltaic (PV) cells, dc-dc power converters are added for matching the load to the photovoltaic generators; thus, maxi- mum power can be reached. In this thesis, mathematical models ...
Design of a parabolic reflector and reflectarray antenna for x-band
The design of a circular aperture planar reflectarray at 9.4Ghz center frequency is presented in this thesis. For the first time, an aperture coupled cross shaped patch is used as a cell element for a reflectarray antenna. ...
Dsd variations on rain-rate estimate algorithms of x- band polarimetric radar and rainfall characterization in tropical environments using 2dvd, rain gauges and trmm data
Data from NASA TRMM satellite and rain gauges, the rain rate per hour was studied. The comparison took place in San Juan, Puerto Rico; when the Tropical Storm Jeanne passed over the island of Puerto Rico. Natural variations ...
Development of an electro-thermal model for a multi-chip igbt power electronic module
A lumped parameter thermal model for a multi-chip power module is presented based in the physical and geometrical characteristics of the module. The model is developed using the thermal component approach. The model is ...
Design and characterization of log periodic rectangular slot ring antenna
This work studies two log-periodic rectangular slot ring antennas configurations. The first configuration is a CPW feed antenna. Return Loss ≤ - 10dB or VSWR ≤ 2 is achieve throughout 5.90 to 12.60GHz for this configuration, ...