If you know what this image is, then you will have no problems handling the site information.
Broadcasting is an extremely wide topic, impossible to cover on a single website, covering such highly specialised subjects. Amongst the sites there are Broadcast specialities like: Digital Stereo, RDS encoder, SNMP TX management, SNTP control software.
Lumped filter design (Butterworth etc), High power combiners (Hybrid, Wilkinson), Microstrip, StripLine.
This site specialises in Microwave Filters and Generic multi-section coupler..