Cloaking instantly reminds me of Harry Potter, in which Harry ventured into restricted zones during late nights for finding out the evil plots of Voldemort. Harry’s invisible cloak may assist him get past the guards; however, it won’t be able to get past radars.
Engineers from Iowa State University have recently introduced a research paper containing intricate details about these metamaterials- the term generally refers to artificial or manmade materials that are not widely available in nature. This will be cloaking an object or even a person from microwaves generated from radars.
There’s liquid metal planted inside different layers of silicone rubber, which is also a mixture of gallium and indium, termed as galinstan. This substance remains in its liquid form at room temperature and is not poisonous like mercury.
The resonators are planted deep inside this material, which is highly flexible; as a result, the engineers of Iowa State University have designed sheets which have the capability to deflect radar signals. Even though this material does not take in all forms of waves but it still manages to trap 75% of these waves ranging from 8-10 GHz, according to the Mashable.
High flexibility of this material provides another upper hand in this entire process as it can take in waves of various frequencies. By stretching, the researcher team has managed to raise up the resonant frequency up by 9.15- 12.38 GHz. They are still planning to improve their product very soon in the future.
According to Liang Dong, one of the researchers behind this project claimed to Everything RF, “The long-term goal is to shrink the size of these devices, and then hopefully we can do this with higher-frequency electromagnetic waves such as visible or infrared light.”
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