Your question is unclear.
Presumably a design goal (for the antenna embedded in the meter) would be to provide something close to omnidirectional coverage. It's not as if they're able to rotate the meter, with attached building, to aim the antenna.
Patch antennas typically radiate off their flat surface. E.g. GPS antennas.
You might need to clarify your question.
P.S. Smart meters are a horrific topic. The internet is knee deep in nonsense.