For a meter box, 60 Hz is not EM. When the long dimension of the electronically active contents are less than about one tenth wavelength, you are better off with magnetic coupling than trying to make the inherently inefficient antenna couple to the EM field.
I was thinking of the GHz range for communication, and 60Hz to get power into the box without having to have a hole with a wire going through it. So the 60Hz would be like an inefficient transformer with a coil on the inside, a coil on the outside, and hope I get away with not having an iron core.
Dunno whether that makes much more sense than what you thought I was thinking or not.
It is precisely that. However, depending on the thinkness of the wall of the box, you may want to consider a higher frequency. For a given mechanical size, you get a higher coupling factor when frequency goes higher. That's why avionic AC was traditionally on 400 Hz, to get the transformer-type components smaller. To avoid the annoying whine, you may want to choose a frequency more typical of, say, switch-mode power supplies. That is, supersonic.
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Dunno whether that makes much more sense than what you thought I was thinking or not.
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