【摘要】 采用天线理论和数值模拟方法研究了同轴线馈电的双锥笼形天线辐射特性。通过双锥天线和馈电同轴线的阻抗匹配确定双锥半张角为32°;结合清晰时间的概念,确定双锥笼形天线半径为2.5m。给出了双锥半径2.5m、笼形天线长度50m、末端经过削锥处理、架高15m时的双锥笼形天线在地面上方2m水平面内的辐射场分布,在该平面上40m×60m的区域内,电场最大值为6kV/m,最小值为1.6kV/m;在80m×10m的区域内,电场最大值为82kV/m,最小值为12kV/m。更多还原

【Abstract】 This paper studies theoretically and numerically the radiation characteristics of the biconical-cylindrical cage antenna fed through the coaxial transmission line.The half angle of biconical antenna is determined as 32°by the impedance matching between the biconical antenna and coaxial transmission line.The radius is determined as 2.5m by the clear-time.Finally,the cage antenna is taken as the form of a 50-m long cylindrical wire,2.5m in radius,supported horizontally above the ground up to 15m.The cylindrical wire’s ends are returned to the ground through the use of tapered conductor sections.For the above antenna,this paper presents the E-field in the horizontal plan above the ground up to 2m.For the electric field in the volume of 40m×60m,the maximum is 6kV/m and the minimum is 1.6kV/m.For the electric field in the volume of 80m×10m,the maximum is 82kV/m and the minimum is 12kV/m.更多还原