tape measure yagi

just shows you that you can use anything to make a aerial.

http://home.att.net/~jleggio/projects/rdf/tape_bm.htm

Tape makes great antennas for portable use. Especially if you want to use it in adverse conditions.
We are in the process of buying an Amateur Radio Direction Finding set up at the club. A few of us have used them & we want to be able to have an International sport quality set up so we can get Scout groups, Schools etc interested in amateur radio via allowing them to compete at international level in the sport & the RX equipment all have metal tape beam antennas.