Action of external interferencecarrying field on nonuniform multiwire shield
Abstract
The shielding effect of multiwire meshes against an external interferencecarrying field is calculated in terms of the attenuation coefficient A=20LOG absolute value of of 1/s, with s=square root of (p sub r, sh/p sub r, o), p sub r, sh and p sub r, o denoting the radial component of the Poynting vector with and without a shield, respectively. The shielding factor S is evaluated from the general solution to Maxwell differential equations, obtained according to the Bromvich method by superposition of two particular solutions (for transverse electric and magnetic waves, respectively). The shielding coefficient is found to depend not only on the shield structure but also on the form of the external electromagnetic field, namely on the ratio of its axial component to its tangential component. Accordingly, expressions are derived for flexible cylindrical singlelayer and doublelayer shields around cables, connecting wires, or cords.
 Publication:

USSR Rept Electron Elec Eng JPRS UEE
 Pub Date:
 May 1984
 Bibcode:
 1984RpEEE....Q..30B
 Keywords:

 Differential Equations;
 Electromagnetic Compatibility;
 Electromagnetic Shielding;
 Mesh;
 Attenuation Coefficients;
 Electromagnetic Fields;
 Maxwell Equation;
 Electronics and Electrical Engineering