Elbit – EW & Sigint division
http://elbitsystems.com/products/ew-and-sigint
ELTA- EW division
http://www.iai.co.il/17887-en/Groups_ELTA.aspx
RAFAEL advanced defense systems – EW systems
https://www.rafael.co.il/worlds/naval/naval-ew/
Israel MOD R&D division – MAFAT