This repo contains simulations, pictures and 3D models to built your own dual-band 2m (VHF) and 70cm (UHF) yagi. The simulation assumes 4 elements on 2 m and 7 elements on 70 cm. If you need another ...

You would construct a counterpoise antenna wire 11.5 inch for VHF, 6.5 for UHF and about 19.5 inches for an OK performing dual band VHF/UHF radio. Normally with a handheld radio the counterpoise ...