الفهرس 
Introduction to AntennasOnly 14 pages are availabe for public view
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Abstract
The purpose of this work was to design and analyze microstrip patch antennas after adding slots on the patch to improve the bandwidth of the antenna. Nowadays Microstrip patch antennas are preferred over other traditional antennas because of their compatibility to be fit in Mobile, Aircraft, and Satellites owing to very small sizes. The introduced slotted patch antenna serves wide band applications such as radar applications, satellite applications, remote sensing applications and biomedical applications. The radiation properties of one I slot microstrip patch antenna were simulated and analyzed. The designed antenna resonated at three bands (4.4-4.7GHz), (5-5.18GHz) and (7.3-15.9GHz). This antenna can be used as a basic element for radar altimeter antenna, satellite and mobile. Also the radiation properties of a rectangular patch antenna with double I slots were obtained and compared with that of a normal rectangular patch antenna designed under identical conditions. The modified antenna not only resonated at two different frequencies but also increased antenna bandwidth with minimum return loss. The designed antenna worked from the band 7.2GHz to 12GHz. The proposed antennas have been characterized using the commercially available software HFSS. The performance of the designed antenna was explained in terms of return loss, reflection coefficient, VSWR, radiation pattern and gain. The dielectric substrate used was RT-Duroid having 2.2 dielectric constant and 3.2 mm thickness.