There was a question posted to another group about connecting to a distant
antenna.
The post reminded me of another article (perhaps in QST) where someone who
lived behind a mountain used 2 rhombic antennas as a "passive repeater" on
uhf. He mounted both antennas at the summit of the mountain with one
pointed to the repeater and the other pointed into the valley where he
lived. As I recall, he was then able to communicate via the repeater.
This brings up other possibilities - like doing the same thing for
inside-outside of a metal bldg.