Near field communication (NFC) is one of various wireless communication technologies that can be enhanced as a solution to transfer high-speed multimedia data. An antenna has a critical role to achieve the purpose. To cover 10 cm distance and 20 Gbps data rates, an antenna has to have the bandwidth, gain, and beamwidth for both vertical and horizontal of more than 10 GHz, 0.16 dB, and 26 degrees, respectively. This paper discusses a proposed microstrip antenna design combined with modified ground technique to provide those specifications. The antenna has a rectangular shape, modified inset lines and slots. Design and simulation is conducted by using CST software. The antenna has a resonant frequency of 350 GHz to provide a wide bandwidth. The simulation results show that the return loss, bandwidth, gain, horizontal and vertical bandwidth are -37.39 dB, 30.28 GHz in the range of 337.09 to 367.37 GHz, 5.51 dB, 59.8° and 61.2°, respectively. From these results are expected that the proposed antenna design can be used for near field communication applications.