Thiink of all antennas as transformers. Some have internal coils which can increase the "apparent" length of a wire or transmitting element. Internal coils can become overloaded and increase SWR. I use a balun on the end of 100 feet of RG-8 coax. Hoisted into a tree with a sling shot and LONG wires launched over trees with bow and arrow. Two wires in opposite directions or multiple wires to create a beam effect. Once the wires are at least three wavelengths, the actual length doesn't matter. In elevated areas, a beam can be created with sticks holding wires above ground, cut to lengths to make radiator, reflector and director elements. This would be fed with a balun and two wires cut to one half wavelength on each side to get a full wavelength.