| In this paper, a novel horn antenna named ribbon horn antenna is proposed. Takingantenna radiation performance and light weight into account, the novel ribbon hornantenna uses two curved ribbons substituting the top plate of the basic model. Due tothe ribbon structure, the antenna can operate at lower frequency bands compared withthe other TEM horn antennas. Firstly, the important size of the ribbon horn antennacould be analyzed using ANSOFT HFSS simulation software. The results show that thelow frequency characteristics of the antenna have been modified, and the operatingfrequency range has been extended correspondingly. And it possesses much lessreflection without balun as other TEM horn antennas. Secondly, based on the basicribbon horn antenna, improved antenna model has been adjusted. Ribbon structure isoptimized, making the design more flexible and gradual structural symmetry. It can beobtained that the improved ribbon horn antenna model is more effective in improvingthe radiation performance and reducing energy reflection compared with the originalmodel. The operating frequency range has been further broadened, which is from 22MHz to 1000 MHz for VSWR less than 2.0. That increases the practical range of theantenna. Finally, the antenna array consisted of the original model enhance the gain andimprove the radiation pattern. |
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