Wearable textile antennas are becoming increasingly significant in today's environment for healthcare and a variety of other applications. As a result of recent downsizing, the use of wearable textile materials for the creation of microstrip antenna segments has been rapid. Wearable textile antennas are being employed more and more in wireless applications. A wearable antenna is intended to be worn as part of communication clothing. Some of the applications include tracking and navigation, mobile computing, and public safety. Wearable antenna materials must have a flat structure and flexible construction. A variety of material properties influence the antenna's characteristics. The bandwidth and efficiency of a planar microstrip antenna, for example, are primarily governed by the ultimate result which is determined by the thickness of the substrate and its permittivity. Textiles are used for a wide range of purposes. It is necessary to characterize the properties of wearable antennas. In this paper, a spear-shaped textile antenna for military application is designed. The proposed antenna is designed to operate at Ku band with a frequency range of 12 – 18 GHz. The microstrip patch antenna uses cotton as the substrate which has dielectric constant εr= 1.6 and tangent loss of 0.04. The spearshaped textile antenna has achieved a gain of 6.85dB and VSWR around 1.03 at the resonant frequency. The size of the designed antenna is 10 mm × 13 mm × 1.6 mm. The radiation characteristics such as return loss, VSWR, radiation pattern, and gain are simulated and presented using CST Suite Studio 2019. The spear-shaped textile antenna can be used in military jackets because of its flexibility, human safety, compatibility, and miniaturization.