【摘要】 设计了一种带有机玻璃天线罩的地平板结构横电磁波(TEM)喇叭接收天线,通过对馈入结构和辐射特性的理论分析初步确定关键结构尺寸,然后利用CST建立天线真实模型,完成相关结构参数的仿真优化,实现了快脉冲的较小馈入反射,时频特性良好。最后的天线测试结果表明,该TEM喇叭天线输入阻抗56Ω,有效高度0.024 m,传递函数在3 GHz以内保持稳定,具备较好的时域保真度和馈入反射特性,适于作为超宽带接收天线。更多还原

【Abstract】 A Transverse Electro Magnetic wave(TEM) horn is designed with floor boarding structure and plexiglass antenna cap. The key physical dimension is preliminarily determined by the analysis on antenna radiation characteristic and feed-in structure. The objective antenna model is established by CST. Relevant structural parameters of TEM horn are optimized by simulation. It is realized that reflection of short pulse is small at antenna feed-in, and the TEM horn has preferable time-domain and frequencydomain characteristics. The test results indicate that, the input impedance of TEM horn is 56 ?, the effective height is 0.024 m, the transfer function keeps stable within 3 GHz, and the TEM horn is fit for ultra-wideband reception antenna.更多还原