This edition presents a thesis, design and build the antenna, mouth open, flatbed, 2 H working frequency range intermediate frequency is low side 8.5 gigahertz and middle frequency high side 11.5 gigahertz using antenna designs principle open mouth pyramid in frequency (X 8.2 GHz to 12.4 GB holle.Process). Designed using techniques to adjust the width, horizontal or side air plane H to get the size of the antennas that are smaller than the antenna open mouth pyramid designed use of the same frequencies. When compared to the air, mouth open, pyramid standards, which are designed in the same frequency band are shaped and sized the mouth smaller antenna is approximately 4 times the vertical side. In this project, the antenna has a Computer program simulation Simulation Technology (CST Microwave Studio) to test the performance of antennas designed by frequency, middle, low side 8.5 gigahertz and middle frequency high side 11.5 gigahertz. There is a coefficient of reflection (S11) is equal to-26 dB and-33 dB, radiation patterns are designs from the antenna on the Side Lobe level of H-plane Level (SLL) equal to-dB and-11 dB 7.8 respectively, and testing the antenna that actually created with network analyzers (Network analyzer), with coefficient of reflection (S11) is equal to-23 dB and-30 dB, the gain (Gain) equal to the dB and dB 7.05 4.64 and the level of the Side Lobe Level (SLL) equal to-10 dB and-13.2 dB respectively, closer to the simulation results of the measurement test of antenna that actually created.
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