Problems of network expansion between campuses at State Polytechnic of Kupang are still an obstacle. The problem of research needs to be done early research so that the results of this study can be implementing in internet network systems between Campus A and Campus B. This Research use Research and Development methods to guarantee the accuracy in the results of research and implementation of the desired Antenna Grid devices. Testing results are looking at the effect of shift Center Beam Antenna on the size of the throughput and alignment antenna based on the principle of Line Of Sight (LOS). The results of the study were also able to provide results in the form of the size of the Antenna Grid signal presentation to the shift Center Beam antenna according to the location of the Building and location contours at State Polytechnic of Kupang. Performing three stages of LOS Grid antenna testing with a test distance of 100 meters, 125 meters, and 200 meters, the transmit average value is 101.923 kbps, and the average receive value is 890.591 kbps. The next stage of testing is Grid antenna testing with the unidirectional placement of the antenna between the Sending and Receiving Antennas with a 200-meter test distance, and the transmit average value is 1.4826 kbps, and the average receive value is 2.2679 kbps.