The reason 6Ghz was introduced with WiFi 6E and 7 was because 2.4Ghz and 5Ghz was very busy.
My question is why isn’t there anything in between? Why isn’t there a 3Ghz, 3.5Ghz, 4Ghz, etc?
Also, what if things that require very little data transmission used something lower than 2.4Ghz for longer range? (1Ghz or something?)
what’s fixed service in this context?
Stuff that doesn’t move. Like a terrestrial radio station, they have one big tower that broadcasts the station and it doesn’t physically go anywhere. That’s distinct from mobile radios like phones, CB radios, etc. which are always moving around all over the place and potentially causing interference. Fixed radio, you generally have a license for a specific geographic area and only you are allowed to use that band in that area. But then they can license it to somebody else at a distant location where it won’t interfere.
but there’s separate category for “broadcast”, so it’s more of point-to-point thing?