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.

• Periodical: Applied Mechanics and Materials (Volume 793)
• Pages: 600-604
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.793.600
• Online since: September 2015
• Authors: Hafizah Mustapha*, K.H. Ismail, T.J. Daim, S.F. Jamil
• Keywords: Antenna, Emission, Frequency, Noise, Radiated, Shielding

References

[1] C. W. Sirles, J. C. Mantovani, A. R. Howland, B. J. Hart, Anechoic Chamber PerformanceCharacterization Using Spherical Near Field Imaging Techniques January (2009).

[2] L. Nowosielski, M. Wnuk, R. Przesmycki, K. Piwowarczyk, M. Bugaj, Methods of Measuring Shielding Effectiveness of Small Shielded Chambers August (2013).

DOI: 10.1109/mms.2011.6068517

[3] W. Mullner, H. Garn, NSA to Site Reference Method for EMC Test Site Validation August 13-17 (2001).

DOI: 10.1109/isemc.2001.950517

[4] ANSI C63. 4 – 2009, Measurement of Radio- Noise Emissions from Low Voltage Electrical and Electronic Equipment in the range of 9 kHz to 40 GHz, American National Standards Institute, August (2009).

DOI: 10.1109/ieeestd.2014.6840852

[5] ANSI C63. 5 – 2005, Radiated emission Measurements in electromagnetic interference (EMI) control –calibration antennas (9 kHz to 40 GHz), American National Standards Institute, December (2005).

DOI: 10.1109/ieeestd.2006.99500

[6] EN50147-1, Anechoic chambers-Part 1: Shield Attenuation measurement, British Standard, BSI, January (1997).