That's kind of a mixed up question you have going on there. Granted protocols and physical layers and frequencies often go hand in hand but not always.
For best power efficiency you want to avoid anything OFDM. Simple GFSK, OOK, biphase, FM, etc. are the best choices. The reason is how the amplifiers have to perform. In this respect everything you mentioned above is fine.
Second you can look at any RF propagation model and immediately realize that the lower frequency you operate at the better your range will be. Also RF amplifiers are more efficient at lower frequencies. Also good!
Anything bluetooth by definition is 2.4GHz as is ANT. So, you should not choose those.
802.15.4 is an open IEEE standard and is offered on several of the lower frequency ISM bands. So that would be good!
If you want the most efficient, longest range, easiest availability you should choose something operating at 433 or 40.68MHz. These are two popular ISM bands that have a lot of global support. After that I would choose 902-928MHz (868 in Europe). Lots of SoC options in that band.
That's kind of a mixed up question you have going on there. Granted protocols and physical layers and frequencies often go hand in hand but not always.
For best power efficiency you want to avoid anything OFDM. Simple GFSK, OOK, biphase, FM, etc. are the best choices. The reason is how the amplifiers have to perform. In this respect everything you mentioned above is fine.
Second you can look at any RF propagation model and immediately realize that the lower frequency you operate at the better your range will be. Also RF amplifiers are more efficient at lower frequencies. Also good!
Anything bluetooth by definition is 2.4GHz as is ANT. So, you should not choose those.
802.15.4 is an open IEEE standard and is offered on several of the lower frequency ISM bands. So that would be good!
If you want the most efficient, longest range, easiest availability you should choose something operating at 433 or 40.68MHz. These are two popular ISM bands that have a lot of global support. After that I would choose 902-928MHz (868 in Europe). Lots of SoC options in that band.
To add to this, I would like to mention that in many designs the battery lifetime requirements can easily be met using many different technologies, other properties of the technology may be worth considering. An nRF52 sending a small packet occasionally only draws a few µA on average, so even a very small battery may last for a very long time.
You will have to consider the energy requirements of your design, but also consider the other features you need for the system. We see that for many designs, the nRF5 series has a suitable feature set and price balance while meeting the energy requirements for the system.
(This answer is of course bias since I work for Nordic Semiconductor)
