Below is a list of a few helpful EM links, if you have any more that should be added to the list, let me know in the comments and I'll add it to the list!
IET Electromagnetics Linkedin page - https://www.linkedin.com/groups/2117649
Our Linkedin page for the community
Rohde and Schwartz - https://www.rohde-schwarz.com/uk/home_48230.html
Innovators in all fields of wireless communications. Organisers of Demystifying EMC