Omnidirectionality Investigation of Wraparound Microstrip Antennas

Microstrip patch antennas are commonly used as radiators in various applications due to their low cost and simple construction on a printed circuit board. The wraparound microstrip antenna is formed by wrapping the antenna completely around a cylindrical surface in the nonresonant dimension. The wraparound antenna is fed at multiple points along the width (circumference) to improve the omnidirectionality. The relationship between resonance frequency, radius of the cylinder, and the number of feeds required to obtain a certain degree of omnidirectionality is investigated here. All the simulations are done using HFSS and CST Microwave and the results are compared, and a good agreement was observed between the results.