Researchers at the Massachusetts Institute of Technology (MIT) have recently developed a new technology that uses radio waves to charge implanted devices in the human body. It is expected to be applied in vivo, to monitor physical conditions and other fields.
MIT recently issued a press release saying that researchers use radio waves that can safely penetrate body tissues in animal experiments and charge devices that are buried under 10 cm of pigskin at a distance of 1 meter. If the device is shallow on the surface, it can be wirelessly charged up to 38 meters away. The researchers said that the prototype device used in the experiment was only the size of rice grains and could even be made smaller to be swallowed or implanted into the body.
MIT Assistant Professor Fadile Adib said that implanted devices do not use conventional batteries and can help develop new medical applications. In August of this year, he will report this new technology at the meeting of the Datacom Specialties Team of the American Computer Association.
However, the challenge of using radio waves to charge in-vivo devices is that radio waves can wear out when they penetrate the body. To this end, the researchers designed a system that allows a group of antennas to emit radio waves of different frequencies, which are superimposed during propagation, allowing the implanted device to obtain sufficient power.
Researchers say that because of the large area covered by radio waves during charging, there is no need to accurately position the sensor in the body, which means that multiple devices can be charged at the same time.
In addition, when the in-vivo sensor receives energy, it can also receive command signals and transmit the collected information back to the antenna. Therefore, this system can be used for in vivo administration, monitoring of physical conditions and other fields. The researchers said that after further improving this wireless charging system, it is also expected to be used in more fields that require long-distance communication and tracking. (Reporter Zhou Zhou)
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