Simulated design and analysis of a new simple multi-band microstrip antenna is presented in this paper. An introduced design covers the requisite bandwidth for GSM/DCS/PCS/UMTS cellular phone system and IEEE Wireless Local Area Network (WLAN) standards: 802.11n, b/g (Wi-Fi), Bluetooth. Light weight, low-cost, plain configuration and multi-band functionality are the advantages. All results of the resonant frequency, return loss, radiation patterns and fields distributions are presented. The simulation analysis was performed using the HFSS software.