<a href="https://en.wikipedia.org/wiki/MMDS" class="extiw" title="en:MMDS">MMDS</a> microwave antenna.  MMDS (Multichannel Multipoind Distribution Service) is a technology for providing wireless internet service using C band (2 GHz)  microwave links.  This antenna is a <a href="https://en.wikipedia.org/wiki/parabolic_antenna" class="extiw" title="wikipedia:parabolic antenna">parabolic antenna</a> with a dipole feed that radiates a beam of vertically polarized microwaves.  The wire grill reflector reflects radio waves as well as a solid metal dish, as long as the spacing between the wires is less than 1/10 wavelength and the wires are oriented parallel to the polarization of the waves, so wire mesh dishes are sometimes used to reduce weight and wind loading on the dish.
Jim Jaworski
<span class="int-own-work" lang="en">Own work</span>