Standard Test Method for Electromagnetic Shielding Effectiveness of Durable Rigid Wall Relocatable Structures

Importancia y uso:

5.1 This standard provides measurement procedures for determining the electromagnetic shielding effectiveness of durable rigid wall relocatable shielded enclosures. This standard specifies a method for comparing the shielded enclosure performance of structures provided by different suppliers. In addition, this standard is written to minimize variations in measured shielding effectiveness at a given frequency and test point regardless of test personnel, equipment, and test site. Therefore, the shielding effectiveness of a durable rigid wall relocatable shielded enclosure of any size from any supplier can be determined. This standard specifies a minimum set of measurements at a given frequency and a minimum set of frequencies to determine shielding effectiveness.

5.2 Source Fields—Performance of a shielded enclosure is to be assessed for two source fields: magnetic and plane wave.

5.2.1 Magnetic Field Measurements—The attenuation provided by a shielded enclosure is assessed by using a local source to generate the near field. The magnetic field measurements are specified for two narrow frequency bands: 140 kHz to 160 kHz and 14 MHz to 16 MHz.

5.2.2 Plane Wave Measurements—The attenuation provided by a shielded enclosure is assessed by using a locally generated distant source or plane wave field. The plane wave measurements are specified for three narrow frequency bands: 300 MHz to 500 MHz, 900 MHz to 1000 MHz, and 8.5 GHz to 10.5 GHz.

Subcomité:

E06.53

Referida por:

E2377-18, E1974-19, E1975-22, E1925-18

Volúmen:

04.11

Número ICS:

13.280 (Radiation protection)

Palabras clave:

electromagnetic measurements; electromagnetic shielded enclosures; magnetic field; plane wave; shielding effectiveness;