对半空间中机载甚低频双拖曳天线电磁辐射特性进行了研究.基于有限元算法建立了机载甚低频双拖曳天线半空间全波仿真模型,利用边界条件模拟了海面半空间环境,深入分析了海面半空间环境对于机载甚低频双拖曳天线辐射特性的影响,通过调整机载甚低频双拖曳天线长短比,优化了机载甚低频双拖曳天线的输入阻抗、辐射效率等设计参数,该研究结果与美国海空军发展中心公布的数据吻合较好,验证了研究结论的有效性和可信性,对机载甚低频双拖曳天线的设计及应用具有参考意义. The electromagnetic radiation characteristics of airborne very low frequency double-towed antenna in half-space are studied.Based on the finite element method, a full-wave half-space full-wave simulation model of airborne very low frequency dual towed antenna is established and the sea surface half-space environment is simulated by using boundary conditions. The influence of sea surface half space environment on the radiation characteristics of dual-towed antenna with very low frequency was studied. The design parameters such as input impedance and radiation efficiency were optimized by adjusting the long-short ratio of double-towed antenna with low frequency. The research results are in good agreement with the data published by the United States Air Force and Air Force Development Center, which verifies the validity and credibility of the conclusions. It is of reference significance for the design and application of dual towed airborne antenna.