Is this a type of navigation aid? I saw this contraption on the southeast corner of Eastern West Virginia Regional Airport, Martinsburg, WV (MRB). My first thought was this was some kind of NDB antenna but not sure.
If you go to www.skyvector.com and zoom in to MRB
(easy to enter a flight from KOKV to KMRB to find it quick)

Select the World VFR view, and you will see no navaids at that location. 
Select the Enroute L-29 view, and you will see no navaids at that location.

So no, it is not a type of currently used navigation aid.

If you peruse the Instrument approaches for KMRB at Airnav.com  https://www.airnav.com/airport/KMRB

you will also not see that structure mentioned.

Airport phone numbers are listed, you could call up and ask what it is.