Can use of higher frequency improve level measurement performance?

[Terminator3]

For example, 20GHz vs 10GHz, 10GHz vs 5GHz level measurement. Can we get more precision somehow when use higher frequency with same signal processing?
Why I ask this, because recently there are some news on RF ICs for level measurement, which use much higher frequency than current mass production. For such industry devices i think size is not concern, so they moved to higher frequency not because size of horn, etc..

 

[vfone]

Definitely no. Higher the frequency, lower the measurement accuracy, from multiple causes.
And yes, sometimes higher frequencies are chosen because they use very low dimensions for antennas. For example a half-wave dipole for 60 GHz has 2.5mm length.