Accuracy Analysis of Shielding Effectiveness of Enclosures With Apertures: A Parametric Study

作者：Liu, Enbo^*; Du, Ping-An; Liu, Wenkui; Ren, Dan

来源：IEEE Transactions on Electromagnetic Compatibility, 2014, 56(6): 1396-1403.

DOI：10.1109/TEMC.2014.2333520

• Analytical formulation
• data-fitting method
• finite-element method (FEM)
• observation points
• shielding effectiveness (SE)
• transmission-line matrix method (TLM)

An analytical formulation for calculating shielding effectiveness (SE) was developed by Robinson. This analytical method, compared with numerical methods, can obtain SE faster and needs less computer memory. However, its accuracy depends on the distance p, which is from the observation point to the aperture. In this paper, a reference distance (p) over bar, which determines whether Robinson's method is precise has been introduced. We define that Robinson's method has a high accuracy if (p) over bar but a low accuracy if p (p) over bar. The relationship between the value of (p) over bar with all related parameters has been intensively studied. The approximate formulation for calculating (p) over bar has also been obtained with the data fitting method. The transmission-line matrix method (TLM) and the finite-element method (FEM) are used to test the approximate formulation. Based on the calculation and analysis in this paper, we can easily get the value of (p) over bar through bringing all related parameters into the approximate formulation. Therefore, when using Robinson's analyticalmethod to predict SE, we can get precise SE by setting observation points at positionsp (p) over bar.

• 出版日期2014-12
• 单位电子科技大学