A Review of Shielding Performance for Anechoic Chamber

Abstract

Anechoic chambers are widely used in performing EMC measurements according to the established EMC standards. As in space area, EMC measurement is critically important to ascertain all of electrical and electronic components in the satellite body will function correctly without fail during launching and operation mode. Recognizing the needs and importance of performing the EMC measurements, the shielding performance of the chamber should be prioritized to ensure the interference of electromagnetic wave from outside going to inside the constructed chamber does not exist. As to maintain the shielding element, periodic checking and inspection should be well planned by conducting a specific test. This paper outlines a series of procedures that are developed while running the test. The test will characterize the shielding performance at four (4) frequency ranges using different types of antenna set. Typical test results are gathered and presented at the measured frequencies. Based on the results, it is concluded that the shielding performance of anechoic chamber is standing in good condition at three (3) ranges of frequencies except for frequency of 10 kHz to 200MHz. Several steps are recommended to remove or eliminate the random noise.

Design of Microwave Pyramidal Absorber for Semi Anechoic Chamber in 1 GHz~20 GHz range

“…It is a lab facility where 99 percent of Electromagnetic waves cannot reflect back from the walls and no interference from external source through small or little holes inside the room. It is protected by a substrate that has an ability to absorb the bulk of incident waves and replicate as a complete free space room without the any reflection or scattering [2].…”