共模阻抗稳定网络的研制

The Development of Common Mode Impedance Stabilization Network

为了消除辐射测试场地供电端口阻抗的差异,本文设计制作了一种共模阻抗稳定网络,可以在供电端口处提供稳定的共模阻抗。文中对该网络的技术参数、元件规格及分布参数控制提出设计方案.经实际制作与量测验证后,该稳定网络可以在30~300MHz的频段内提供稳定的阻抗(50±5?),符合设计方案的目标,利用此网络可有效消除供电端口阻抗差异引起的测试误差。

To eliminate the variation of power port impedance of radiated emission test site, we design and build a common mode impedance stabilization network, which can provide stable impedance at power port. In this paper, the technical specifications, component specifications and requirements of parasitic control are provided. By sample building and testing, the network can provide stable impedance at 50±5? from the frequency range 30MHz to 300MHz. The results meet the design requirement, and it is expected to efficiently eliminate the measurement uncertainty due to power port impedance.