中文摘要：

近场电场测量存在种种问题，从理论上对顶加载偶板子天线进行了分析，利用电磁场分析软件研究天线的阻抗特性和方向图，并研究应用前置运算放大器来提高测量灵敏度，利用电路仿真软件分析了运算放大器的增益特性，通过仿真验证了天线接入运放后电路的可行性。

英文摘要：

Forproblemsofmeasuringtheelectric-fieldintensityinnearfield, the top loading-small dipole antenna was studied theoretically in this paper. The antenna impedance characteristics and directional diagram was analyzed with using the electromagnetic simulation software. Operational amplifier has been used for enhancing sensitivity and its gain characteristic was analyzed with using the electric circuit simulation software. Through the simulation, the feasibility of the electric circuit was confirmed after using the operational amplifier.