Files with maa file extension seems to be mostly found as antenna data files fom MMANA, MM Antena Analyzer. Probably obsolete file format.
MAA file extension - MMANA antenna data file
What is maa file? How to open maa files?
File type specification:
The maa file extension is associated with the MMANA (MM Antena Analyzer) an antenna analyzing device.
The .maa file contains various data captured by MMANA and used for analyzing in any specialized software.
Most likely some old format without support. No further information could be found.
This maa file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.