1. [1] Cuming Microwave, “An Introduction to Anechoic Chamber Application Note 300-1,” 2011, http://www.cumingmicrowave.com (Accessed: Feb. 2017).
2. [2] Rubber Research Institute Department of Agriculture, “Thailand NR Production in 1999-2014,” http://www.thainr.com/en/?detail=stat-thai (Accessed: April 2018).
3. [3] P.S. Neelakanta, Handbook of Electromagnetics Materials Monolithic and Composite Version and Their Applications, p.493, CRC Press, New York, 1995.
4. [4] A. Bunchuay, Electromagnetic Interference Sheilding Material Made from Natural Rubber, M.S. Thesis, Prince of Songkla University, Thailand, 2005.
5. [5] European standard, EN 50147-1, “Anechoic chambers Part1 Shield attenuation measurement,” 1996.