Abstract
It is very well known that the Rectangular Microstrip Antennas (RMA) are narrowband, but it is possible to enhance its bandwidth by cutting slots inside the patch. Some slots variations have been used to improve this important feature in modern mobile radiocommunication systems. U-slot antennas are employed in broadband applications, but it is very important to consider the usage of a thick substrate with a low dielectric constant. In this paper, an U-slot RMA built in a The Printed Circuit Board (PCB) with a thin FR4 substrate for 800 MHz to 900 MHz is presented and analyzed. The PCB that is necessary to fabricate the antenna is very low cost and it is conformable in many mobile terminals. The antenna was simulated in HFSS and measured using return losses and its antenna patterns.
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