You all know the ISM bands,the frequency spectrum avaliable for average Joe to be used for things from microwave ovens,wifi, bluetooth and wireless drones,to alarms and amateour radio.Some of these bands are avaliable wordwide,other varies from country to country.
For long time,2.4 GHz is by far most popular.As result this band is overcrowded in densely populated areas,mainly due to wifi.5.8 GHz is also popular these days,most wifi routers can transmit at 5.8,also most modern smartphones,tablets,notebooks and other devices can recieve at this frequency.Currently,new frequency band is on the rise,the 61.25 GHz.This milimeter wave class band requires state of art expensive electronics but its been already standardized in 802.11ad in 2012.There is even Wireless Gigabit Alliance (WiGig) promoting this 60 GHz band.
My question is this,why nobody uses the 24 GHz band? It should be cheaper and have better range than 60 GHz,also unlike the 60,24 is avaliable worldwide just like 2.4 & 5.8.
If you google 60 GHz,which barrely even started,there is TONS of articles and all kinds of information.On other hand if you google 24,you find there isnt anything,its like this obscure unknown thing,some GaAs amplifier here,some old scientific paper there,some microwave amateur and thats it.Why is 60 so popular and 24 ignored? Why nobody makes 24 GHz wifi? Its almost like that band doesnt even exist,why everybody ignores it?