I recently noticed some new antenna installations on the cars belonging to my local constabulary. I struck up a conversation with one police officer at a gas station; and while he knew nothing about the technical aspects of his antennae, he let me measure the setup. It consists of 4 full-wave 800MHz vertical elements, spaced a half-wave apart from each other (nearest) in a square. I am curious if anyone was ever experimented with something like this for 2m or 70cm (obviously not full-wave). It has gotten me curious.