Moreover, it was believed, these millimeter-sized microwaves not only would fail to penetrate structures and other obstacles but would reflect off them and off particles in the air in a way that would cause hopeless mazes of multipath. Multipath would be translated into several images, i.e., ghosts, on the screen. Finally, there was the real show-stopper. Everyone knew that these frequencies are microwaves. The key property of microwaves, as demonstrated in the now ubiquitous ovens, is absorption by water.
Microwaves cook by exciting water molecules to a boil.
Microwave towers are said to kill birds by irradiating their fluids. Microwave radar systems won't work in the rain. In fairness to his detractors, Bossard had no license, patent or prototype at the time. But these holes in his plan did not deter Vahak Hovnanian and his son Shant from investing many millions of dollars in the project. It could be the best investment the Hovnanian tycoons ever made.