When I need to feed a dipole from 50 Ohm coax I attach quarter wave coaxial cable section (so-called Pawsey stub) to make my feed balanced. This is common knowledge, works great, described in every antenna book.
Now I need to feed dual band dipole from 50 Ohm coax and bandwidth of Pawsey stub balun is much too narrow to cover both bands. If I attach two Pawsey stubs, one per each band, will I get dual band balun?