Abstract
This paper presents a compact planar multiband antenna designed for mobile communication systems. With increasing miniaturization of communication systems and electronic components, the need for compact and small-size antennas is widely perceived. To accomplish this, a right angled isosceles triangular Microstrip patch antenna is designed using CST Microwave studio software. The proposed antenna is designed to be operated at UWB frequency range with coaxial feed technique. The antenna design has been used for size reduction as well as bandwidth improvement. Furthermore, basic antenna parameters such as resonant frequency and the quality factors for dominant modes have been analyzed and compared.