Multiband Slotted Circular Microstrip Patch Antenna

Design and analysis of Circular Microstrip Patch Antenna (CMPA) using slots etched on patch for multiband applications is presented in this paper. Lightweight, low cost, plain configuration, and multiband functionality are the advantages and serve many applications like satellite communication, air traffic control, and radar communications. The substrate used is FR4 epoxy which has relative permittivity of 4.4. Introduction of slots increases resonant frequencies and bandwidth which make antenna serve multiple applications. The design is simulated using Ansoft HFSS software, and return loss, gain, VSWR, radiation pattern, and field distributions are studied.