My SpiroNET Cap design replaces the original cap that breaks easily in crashes.  Its streamlined shape allows your antenna to clear obstacles easier.  It won't act as a hook, since we aren't time travelling yet.  Print two and zip tie them together over your exposed antenna lobes.  If your lobes have been bent out of shape, the built in lobe template will also ease you into shaping it back to factory angles.  (For 5.8ghz ImmerisonRC SpiroNET RHCP Antenna)