Paper Title
DESIGN AND ANALYSIS OF RADIATION PATTERNS FOR A 5.8GHZ MICROSTRIP PATCH ANTENNA USING ALTAIR FEKO

Abstract
This paper presents the design & analysis of the radiation pattern for a 5.8GHz microstrip patch antenna using the electromagnetic simulation software ALTAIR FEKO. The antenna is fabricated on a substrate with a dielectric constant of to achieve a compact design with stable radiation characteristics. It is intended to operate in the ISM band and uses a coaxial feeding technique for effective impedance matching. The antenna is optimized to achieve a gain of 8 dBi & directivity of 9 dBi, making it suitable for high frequency applications such as WLAN, point-to-point wireless communication links & vehicular communication (v2v). A rectangular patch is designed with dimensions of length 13.34mm, width 17.42mm, and dielectric height 1.6mm. Through simulation, far field gain, far field directivity and axial ratio are thoroughly analyzed. It is demonstrated through simulation that the antenna exhibits an efficiency of 79.4%, while the remaining 20.6% is lost due to factors such as ohmic losses or impedance mismatches. Future improvements may focus on bandwidth enhancement and real-world performance validation, such as WPT (Wireless Power Transfer). Keywords - AITAIR FEKO, Microstrip patch antenna, far field, Electric field, Gain, Efficiency, Feeding modes