A 2-element quad for 2m
This is my favorite antenna for mobile transmitter hunts, as it doesn’t stick up as high above the roof as a yagi (for vertical polarization). A 3-element version has better performance, but is harder to turn at speed due to to the added wind drag.
At some point I’ll get better instructions with photos added here, but for the moment you can follow this link to a text description. (Sorry, the dimensions are only given in Imperial units.)