Fan Yu-Wei, Zhong Hui-Huang, Shu Ting, Li Zhi-Qiang, Zhou Heng, Zhou Wei-Hong, Luo Ling
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Rev Sci Instrum. 2009 Feb;80(2):024701. doi: 10.1063/1.3076407.
In order to reduce the effective area of the receiving antenna to receive microwave power in the high electric field regions, a 1.76 GHz shorted coaxial transmission line (SCTL) is investigated numerically and experimentally in this paper. When the frequency is 1.76 GHz, the simulation results show that the general gain and the effective area of the SCTL are -10.21 dBi and 2.19 cm(2), respectively, and the power capacity of the SCTL is about 41 kW. So the maximum power flow density, which can be measured by the SCTL, is 18.7 kW/cm(2). With the frequency varying from 1.70 to 1.80 GHz, the general gain increases from -11.19 to -9.42 dBi linearly. The general gain of the SCTL is calibrated with the Agilent E8363B network analyzer in an anechoic chamber, and the calibrated results agree with the simulation. The high-power tests are performed on an improved magnetically insulated transmission line oscillator. Compared to the cutoff free-field probe, the maximum power flow density, which can be measured by the SCTL, is higher.
为了减小接收天线在高电场区域接收微波功率的有效面积，本文对一条1.76 GHz的短路同轴传输线（SCTL）进行了数值和实验研究。当频率为1.76 GHz时，仿真结果表明，SCTL的总增益和有效面积分别为-10.21 dBi和2.19 cm²，SCTL的功率容量约为41 kW。因此，SCTL能够测量的最大功率流密度为18.7 kW/cm²。随着频率从1.70 GHz变化到1.80 GHz，总增益从-11.19 dBi线性增加到-9.42 dBi。SCTL的总增益在消声室中用安捷伦E8363B网络分析仪进行校准，校准结果与仿真结果一致。在改进的磁绝缘传输线振荡器上进行了高功率测试。与截止自由场探头相比，SCTL能够测量的最大功率流密度更高。
