Abstract:Traditional land satellite communication system mostly use parabolic antenna, which is bulky and inflexible. Microstrip arraying antenna also can be used as the antenna of land satellite communication system. However, the microstrip antenna has a low gain and a large loss. In this paper, a novel waveguide horn antenna is presented. The radiation layer is perfect conductor with an octagonal hole in the center. The feeding layer is double orthogonal microstrip-feed planes to achieve dual-polarization. The unit antenna size is only 21mm*21mm*2.2mm. Then a feeding network with four aiquot ports is designed and 2*2 waveguide horn antenna array is composed. The array antenna’s gain is simulated by HFSS and measured by a vector network analyzer. The simulating result is 15dB and the measure one is 14.5dB. The antenna has a simple structure, small volume and high gain. With arraying, the antenna can be used as land satellite communication antenna instead of traditional parabolic antenna.