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And there are services that can not use IPv6, due to technical reasons: GPS is one example. Emergency beacons is another. Some scientific applications do also need their own frequency allocations. The same goes for the military.
In summary: frequency application strategies are not as simple as the proponents for "open spectrum" assumes. Cognitive radios comes with huge overheads in size and power, and would make a lot of wireless applications we use everyday impossible. (Typical example: remote control car locks.)
The difference between the standalone chip antenna, with a maximum size of 1 mm, with the proposed antenna, with an size of 17 mm, is not revolutionary, it is expected due to the very bad efficiency of electrically small antennas.
In the paper three designs are compared:
(1) One with only an antenna on chip. That is, an antenna on the actual chip, with a size of 1x0.5 mm. Draws 3.3 mW, "range" 1m.
("Range" is a very strange measure in RF design...) (2) The same chip but without the on-chip antenna. Instead the power is coupled to an additional PA-amplifier, and an external small folded dipole antenna: Size about 16x10 mm. Draws 38 mW, "Range" 75 m. (3) The same chip withou the PA, with the on-chip antenna coupling to an external patch antenna of size 17x17 mm. Draws 3.3 mW, "Range" 24 m.
In summary: Nice engineering work, but no conclusions can be drawn, as it is very much a case of apples and oranges. (No constant TX power, No constant size, Not very much constant between the designs at all.)
And a classic mobile phone does not use an on-chip antenna at all. So this design will not give any benefit to your iPhone or Blackberry etc.
I.e. This will not revolutionize the battery life of your iPhone or Blackberry. The losses in the coupling between the integrated PA and the antenna are very small (if we disregard detuning due to human proximity effects. Which is another story, and which is not influenced at all by the design in question.)
The comparison between two different antennas at different powers is not very good science - it is somewhat suprising it got published. (But it is only at a small conference, so it is not that surprising.)