This paper discusses the design and realisation of an 8-slotted waveguide antenna with a cross slot design for Long Term Evolution (LTE) applications. The method used in this paper is simulation, fabrication, and measurement. The simulation was carried out using 3D Electromagnetic Simulator. The designed antenna was made of brass plate with thickness of 0.8 mm. The overall dimension of this antenna is 113 mm x 59 mm x 813 mm with the slot dimension of 57.22 mm x 7.85 mm. The result of simulation confirmed that the antenna has the bandwidth of 133.9 MHz at the frequency of 2.28 to 2.41 GHz with -10dB return loss. The result confirmed that the antenna has 164.3 MHz bandwidth from 2.28 to 2.44 GHz with a similar return loss.