In this paper, a single feed low profile and easy to fabricate circularly polarized slot antenna for four frequency band i.e. Global Positioning System, (GPS), World Wide interoperability Microwave Access (WiMAX) and Wireless Local Area Network (WLAN) has been developed. A CP multi band stub loaded antenna is designed and studied using a soft HFSS V 14.0 designer on the substrate of 3.5 relative permittivity, height of 0.8mm and delta factor of 0.004. For quad frequency band, three stubs, this works as monopole, included in the design.