| The demand for satellite communications are increasing with the rapidly development of society, both in civilian or military, the application of satellite communications ground station system become more frequently, as a SOTM(satellite-communication-on-the-move) system, antenna plays an important role. Satellite signals SOTM antenna received suffers atmospheric attenuation and more intense rain attenuation, additional channel attenuation of up to 20dB,and a weak signal need a higher gain antenna. However, re-developed antenna will bring about tremendous waste of time and money, therefore, it will be Cost-effective by loading antenna radome on the existing antenna to improve the antenna gain. Currently, the conventional SOTM antenna work on Ku-band, the gain is generally over 28dB, in this condition, improved gain by the conventional radome has a greater challenge.Based on this condition, this thesis, based on artificial metamaterials antenna radome, combined with the feature:zero refractive index, negative refractive index and perfect lens equivalent,and improve SOTM antenna gain in the case of having a basic higher gain. Firstly, extracting electromagnetic parameters of artificial metamaterials, then study and obtain the relationship between the artificial metamaterials radome and antenna gain. Finally, verify the conclusion, show that the lower antenna original gain,the greater level of increase, while the original antenna gain of 35dB, metamaterials antenna radome can increase the original maximum gain 1.1 dB, and in the condition of SOTM antenna with 27dB gain, the maximum gain enhance 1.3dB, the basic realization of 1dB increase in the bandwidth of 500MHz, the research results expected to apply in the current traditional SOTM antenna, and further improve its performance. |
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