there is no known technology or scientific principle that would allow a person to become completely invisible to the human eye using microwaves or any other means. The concept of invisibility, as commonly portrayed in science fiction, remains purely fictional and not achievable with our current understanding of physics.
Invisibility, as depicted in movies or books, often involves bending light or electromagnetic waves around an object or person, making them appear invisible to the observer. While there have been some advancements in creating invisibility cloaks for certain wavelengths of light using metamaterials, these techniques are far from being applicable to the human scale, especially visible light.
Microwaves, which are a form of electromagnetic radiation, operate on a different wavelength than visible light. Even if we were to somehow manipulate microwaves around a person, it would not render them invisible in the visible spectrum that humans perceive.
Invisibility cloaking is an exciting area of research, but it is primarily limited to small-scale experiments and has not been realized for macroscopic objects like humans. Additionally, even if technology were to advance in this field, there would likely be numerous ethical considerations and potential misuses to address.
As of now, the idea of becoming invisible like the fictional characters we see in movies and books remains firmly within the realm of science fiction and has not become a reality.