This paper presents the design and simulation of broadband microstrip patch antenna using High Frequency Structure Simulator (HFSS).The two different configuration of broadband microstrip patch antenna, simple rectangular patch antenna & E shaped patch antenna are analyzed. The performance of designed antennas is analyzed in terms of return loss, bandwidth and gain. The substrate used in these two configurations is FR-4 having dielectric constant 4.4. After analyzing, the return losses and gain of two different antennas are calculated. The calculated result for return loss of rectangular patch & E shape patch are -21.93 db & -25.714 db and gain of rectangular patch & E shape patch are 6.787 db & 8.284db respectively