Researchers prepare to make the first test. To affect. Gravity waves.

Artistic depiction of a fictional anti-gravity vehicle (Wikipedia, Anti-gravity) 

If we think that antigravity means a craft that hovers silently, we can say that the hot air balloons can be determined as “anti-gravity vehicles”. Once, there were some engineers who wanted to put hot air chambers in the back of the aircraft. When there is some kind of torch that hot air pushes craft upward. If the power of the fire is high enough. That system can lift aircraft silently from the ground. 

Many times people tell. They make some kind of anti-gravity vehicles. The fact is that. Most of those vehicles use ion or some kind of acoustic waves for levitation. There are also models that use. Simply propellers to hover. Also. Some of those systems can be. Simply some kind of airships. The airship can hover silently over the ground. But the real antigravity is the dream of the human. That system should make. An energy ditch at the front of the craft. And then that energy ditch pulls the craft forward. Some of those very exotic propulsion systems can use frozen protons to decrease the energy level at the front of the craft. There is possiblity. That's some kind of phonons. 

Can. Used to make acoustic waves. The thing that makes those acoustic waves push the craft forward is the wave that fills the pothole. But if the craft can deny wave return to its shell. To fill the point. There. The acoustic system pushed gas away. When the acoustic system pushes waves away from the craft. They form low pressure. Then the gas falls into that pothole. If that thing can be denied. The series of low-pressure areas can pull the craft forward. 

"Did Evgeny Podkletnov manage to shield an object from the effects of gravity with this 1992 design? Two decades have passed and, so far, only Podkletnov himself has reported success. (Scientists have, however, enjoyed success with superconductors though.)© 2010 HowStuffWorks.com.

This system can be. An ion-based thuster. The system drives ions below the craft. This makes an ion cushion under the craft. That will not be enough to raise the craft off the ground. The system can also make the tornado above the craft, which decreases its weight by pulling it up. This can decrease the weight. But it doesn’t actually deny gravity.

There is also a possibility that the virtual antigravity system is based on the Meissner effect. Or, the superconducting levitation. The bottom of the craft can be covered by using the superconducting magnets. The system can use liquid gas. That makes the magnets below the craft superconducting. That extremely low-temperature gas can be packed in the thermos bottles. Or the craft can make it, if it has the right cooling system. 

The ion system can transport ions below the craft. That packs gas or ions under the craft. And make the ionized air cushion below the craft. That thing can decrease the craft’s weight by about 20-x percent. In the same way. There can be magnetic levitation systems on runways. That pushes aircraft up. Those systems use the same magnetic levitation effect as “maglev” trains. In some models, the VTOL (Vertical Take-Off and Landing) craft drops the magnetic plate below it. And then magnetism in that plate pushes the craft upward. If the system pushes ions upward. It can push ions against the plate, and that can pull the craft up. The system bases. In the same idea. With hot air balloons. The rising particles. Pushes craft upward. 

But the anti-gravity that denies the gravitational effect would be the most fundamental thing in the world. 

"Sketch of the interferometric set-up for light under the influence of a gravitational wave. Credit: B. Schröder/HZDRA new concept for energy transfer between gravitational waves and light." (ScitechDaily, Physicists Propose First-Ever Experiment To Manipulate Gravitational Waves)

"When massive cosmic objects such as black holes merge or neutron stars crash into one another, they can produce gravitational waves. These ripples move through the universe at the speed of light and create extremely small changes in the structure of space-time. Their existence was first predicted by Albert Einstein, and scientists confirmed them experimentally for the first time in 2015."(ScitechDaily, Physicists Propose First-Ever Experiment To Manipulate Gravitational Waves)

The thing. What makes gravity so special is that it has only one direction. The gravity center forms an energy pothole around it. And the gravitational fields cannot push objects away from the gravitational field  because the energy hilltops between energy ditches cannot reach the edge of the energy pothole. That surrounds the gravitational center. A gravitational pothole is the same as an energy pothole. That makes objects fall. Into the gravitational center. The gravitational waves are energy hilltops and energy ditches that travel uphill against that pothole. 

The gravitational wave is the combination of the energy ditch and the energy hilltop. The reason. For. Why those energy hilltops cannot push objects away from that pothole is this: They cannot reach the edge of the energy pothole, because they lose so much energy into the energy ditch between those waves. The thing that makes antigravity possible could be the system that fills those energy potholes between those energy hilltops. 

The model of antigravity is quite simple. The system must just fill the energy ditches, or lower energy areas between energy hilltops or energy hills. That creates a standing wave that pushes. Craft away from the gravitational pothole. This theoretical model is quite hard. To turn into a real application. 

"A high-temperature superconductor levitating above a magnet. A persistent electric current flows on the surface of the superconductor, acting to exclude the magnetic field of the magnet (Meissner effect). This current effectively forms an electromagnet that repels the magnet." (Wikipedia, Superconductivity)

The new models of gravity fields make. Probably. Possible to affect gravity waves using light. We can think that the gravity field forms when particles spin, or they bind energy. When an object sends gravity waves. That happens when the spin of its particles accelerates. When that acceleration happens, the particle binds the quantum field into it. And when the particle’s spin slows, that means particles send energy waves. Or, they release energy that they stored. 

The thing is that the gravitational waves are like ditches that travel across the universe. So the model goes like this. The hilltops between those ditches form when particles slow their speed. In that moment, they send energy waves. Because the gravitational center is always in the energy pothole, that bottom is always lower than the space outside that pothole. That makes the gravity field. Pulls things to the gravity center. 

We can think of gravitational waves as energy waves that travel uphill of that pothole. We can say that this model tells us. Why. Gravitation is so strange. Because the hilltops of those energy waves are below the edge of the gravitational pothole, they cannot push objects away. And that makes the object fall into the gravitational pothole. That thing. Means that. Antigravity requires that the system can inject energy into hilltops between the energy ditches. The system should arise. So. A high-energy wave that comes from the gravitational center, so that this energy wave can push the object away from the gravitational pothole. 

The system must collect. So much energy at the point where it is. It can create an energy hill that rises it. Above the energy pothole ‘s edge that surrounds the gravitational center. The thing that makes this so hard to make in practice is this. The system must deny the energy ditches to transport energy from below the energy hill that it creates under it. Another way. Is to fill. Those energy ditches between energy hills. And that makes the effect that pushes craft backward. The idea is that the system fills those ditches. And. Forms the standing wave that pulls the craft out from the gravitational pothole. As. I wrote before. 

https://www.grunge.com/1179379/just-how-possible-is-anti-gravity-technology/

https://science.howstuffworks.com/innovation/science-questions/antigravity.htm

https://scitechdaily.com/physicists-propose-first-ever-experiment-to-manipulate-gravitational-waves/

https://en.wikipedia.org/wiki/Anti-gravity

https://en.wikipedia.org/wiki/Meissner_effect