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Engineers have developed cheap, scalable methods to make metamaterials that can manipulate microwave energy

Engineers have developed cheap, scalable methods to make metamaterials that can manipulate microwave energy

  • Categories:Industry News
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  • Time of issue:2021-07-02
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(Summary description)Engineers at Tufts University have developed new methods to more efficiently manufacture materials that exhibit abnormal behavior when interacting with microwave energy, which has potential effects on telecommunications, GPS, radar, mobile devices, and medical equipment. They are called metamaterials, sometimes referred to as "impossible materials" because in theory they can bend the energy around objects to make them appear invisible, concentrate energy transfer into a focused beam, or have chameleon-like capabilities To reconfigure their absorption or transmission in different frequency ranges.

Engineers have developed cheap, scalable methods to make metamaterials that can manipulate microwave energy

(Summary description)Engineers at Tufts University have developed new methods to more efficiently manufacture materials that exhibit abnormal behavior when interacting with microwave energy, which has potential effects on telecommunications, GPS, radar, mobile devices, and medical equipment. They are called metamaterials, sometimes referred to as "impossible materials" because in theory they can bend the energy around objects to make them appear invisible, concentrate energy transfer into a focused beam, or have chameleon-like capabilities To reconfigure their absorption or transmission in different frequency ranges.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-07-02
  • Views:0
Information

Engineers at Tufts University have developed new methods to more efficiently manufacture materials that exhibit abnormal behavior when interacting with microwave energy, which has potential effects on telecommunications, GPS, radar, mobile devices, and medical equipment. They are called metamaterials, sometimes referred to as "impossible materials" because in theory they can bend the energy around objects to make them appear invisible, concentrate energy transfer into a focused beam, or have chameleon-like capabilities To reconfigure their absorption or transmission in different frequency ranges.

The innovation described in the journal Nature Electronics uses low-cost inkjet printing to construct metamaterials, making the method widely accessible and scalable, while also providing applications such as large laminating surfaces Or the ability to interface with the biological environment and other advantages. This is also the first demonstration that organic polymers can be used to electrically "tune" the properties of metamaterials.

A thin-film polymer can adjust the characteristics of inkjet-printed small microwave resonator arrays. The composite device can be adjusted to capture or transmit microwave energy of different wavelengths

Electromagnetic metamaterials and metasurfaces, their two-dimensional counterparts-are composite structures that interact with electromagnetic waves in a special way. These materials are composed of tiny structures, smaller than the energy wavelength they affect, carefully arranged in a repeating pattern. Ordered structures show unique wave interaction capabilities, enabling the design of unconventional mirrors, lenses, and filters to block, enhance, reflect, transmit, or flexural waves, surpassing the possibilities of traditional materials.

Engineers at Tufts University made their metamaterials by using conductive polymers as substrates, and then ink-jet printed specific electrode patterns to make microwave resonators. The resonator is an important component used in communication equipment, which can help filter the selected frequency of the absorbed or transmitted energy. The printing equipment can be electrically tuned to adjust the frequency range that the modulator can filter.

Metamaterial devices operating in the microwave spectrum can be widely used in telecommunications, GPS, radar, and mobile devices. In these devices, metamaterials can significantly improve their signal sensitivity and transmission power. The metamaterials produced in the research can also be applied to medical device communication, because the biocompatibility of thin-film organic polymers can integrate enzyme-coupled sensors, and its inherent flexibility allows the device to be molded into a suitable surface for use on the body. On or in vivo.

We demonstrated the ability to electrically adjust the characteristics of metasurfaces and metadevices operating in the microwave region of the electromagnetic spectrum, said Fiorenzo Omenetto, professor of engineering and head of the engineering department at Tufts University’s School of Engineering. Compared with current meta-device technology, our work represents a promising step, which depends largely on complex and expensive materials and manufacturing processes.

The tuning strategy developed by the research team relies entirely on thin-film materials, which can be processed and deposited on various substrates through large-scale scalable technologies such as printing and coating. The ability to adjust the electrical properties of the substrate polymer allows the author to compare to traditional non-metallic materials (<0.1 GHz).

Due to the technical challenges of manufacturing tiny substructure arrays on this scale, the development of visible light metamaterials with nanometer wavelengths is still in the early stages, but microwave energy metamaterials with centimeter wavelengths are more suitable for the resolution of common manufacturing methods. The authors suggest that the manufacturing methods they describe using inkjet printing and other forms of deposition on thin-film conductive polymers can begin to test the limits of metamaterials operating at higher electromagnetic spectrum frequencies.

This research may be just the beginning, says Giorgio Bonacchini, a former postdoctoral researcher in Omenetto's lab and now at Stanford University, who is the first author of the research. It is hoped that our proof-of-concept device will encourage further exploration of how organic electronic materials and devices can be successfully used for reconfigurable metamaterials and metasurfaces across the electromagnetic spectrum.

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