Does 5ghz consume more battery?

4G consumes battery the most followed by 3G & then 2G .

The 3G radio in your smartphone uses less battery power than the 4G radio . But 3G is also much slower at moving data, so the 3G radio must operate (and use battery) for a longer time to compensate for its lack of speed.8 Mar 2018

no. If signal strength is the same under both frequencies, then 5ghz barely uses any more power than 2.4Ghz .