Make a half-square antenna and hang it on the side of your house. Use 20 gauge wire and no one will see it. Tie a small nut or insulator on the bottom of the legs to get them to hang straight. Cut the quarter wave legs to 28.5 Mhz and the top feeder to be double the legs. Feed with coax, tune the entire band and have some gain over dipole as you will have two quarter wave verticals in phase. A couple of places sell ready made ones. Maybe you can learn more from these:
http://www.angelfire.com/md/k3ky/page39.htmlhttp://www.angelfire.com/electronic/hypower/webdoc7.html