The characteristics of a new wideband inverted trapezoid microstrip patch antenna fed by uneven I-beam have been analyzed using a full wave analysis simulator. The wideband antenna performance greatly depends on the design parameters, which have been used to control the antenna resonance frequencies and bandwidihs. The proposed antenna is constructed on glass-epoxy FR-4 substrate of thickness 1.6 mm and relative permittivity 4.6. Numerical results of the different design antenna parameters radiation characteristics, including return loss, radiation pattern and gain with respect to changes on the design parameters are presented.
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