Engineers are building a new class of synthetic materials—3D-printed metamaterials—that bend electromagnetic waves in ways natural materials cannot, for applications from mobile communications to defence. Today’s electronics are largely built from flat, layered circuits. This limits how small and efficient components can be, especially at high frequencies like microwaves and terahertz waves. The SYMETA project aims to break that constraint by designing microscopic “meta-atoms”—tiny structures made from metals, ceramics, and magnetic materials—and arranging them in three dimensions using additive manufacturing. This would let engineers specify exactly how a material responds to electromagnetic fields, effectively building the circuit and the material as one object. If successful, the approach could cut manufacturing waste, eliminate harsh chemicals, and shrink the time from design to product. The immediate applications lie in consumer electronics, radar, and satellite communications. Because the work is exploratory—synthesising new building blocks and proving the manufacturing process—practical devices are several steps away. But the goal is to give the UK a lead in a manufacturing method that could reshape how high-frequency electronics are made.
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The outcomes of SYnthesizing 3D METAmaterials for RF, Microwave and THz Applications (SYMETA) have the potential for significant academic, economic, societal and environmental impacts. To achieve these outcomes SYMETA will bring together leading expertise in engineering, physics and materials science from five institutions: Loughborough University, University of Exeter, University of Sheffield, Oxford University and Queen Mary, University of London together with twelve industrial partners from a range of sectors including defence and electronics manufacture. The Grand Challenge will be led by Loughborough University. SYMETA responds to Grand Challenge 3: Engineering across length scales, from atoms to applications. This Challenge area requires researchers to consider design across the scales for both products and systems looking at new approaches to bridge the meso-scale (intermediate-scale) gap and taking into consideration that many engineering systems are dynamic. SYMETA's grand vision is to deliver a palette of novel, multi-functional 3D metamaterials (synthetic composite materials with structure that exhibit properties not usually found in natural materials) using emerging additive manufacturing (AM), with the potential to support a single 'design-build' process. Our goal, to compile a palette of meta-atoms (the basic building blocks of metamaterials) and then to organise these inclusions systematically to give the desired bulk properties, opens up a plethora of new structures. This will not only improve existing applications but inspire new applications by breaking down barriers to innovation. Introducing these novel structures into the complex world of electronic design will offer a radical new way of designing and manufacturing electronics. The metamaterials will be developed to give end-users the electromagnetic responses they require, for a wide range of communication, electronics, energy and defence applications. The meta-atoms comprising the metamaterial will be micro-scale, i.e. small in comparison to the wavelength of operation, and fabricated from a range of new and existing raw materials, including the incorporation of dielectric, metallic and magnetic components. They will facilitate complex multi-component systems, incorporating elements such as inductors, capacitors, and resistors through to transmission lines and matching circuits and filters, to be created in hybrid and multi system AM - reducing waste, cost and timescales. The SYMETA project has three overarching research goals: 1. To synthesize a palette of 3D meta-atoms using suitable materials. 2. To construct designer-specified 3D arrangements of meta-atoms using process efficient AM to create metamaterials 3. To build demonstrators for applications at RF, microwave and THz frequency ranges. Supplementing these research goals SYMETA will: 4. Build a cohort of new knowledge by bringing together multi-disciplinary expertise from a number of institutions and companies and share this knowledge across academic networks. 5. Engage industry, sector relevant professional bodies and the wider academic community to ensure that the potential of this research is recognised and realised. To translate and condense the exciting science to key messages and outcomes and to communicate these to the public to boost the public understanding of science. The likely impacts of the SYMETA are manifold. It has the potential to transform manufacturing processes and to significantly shorten the time it takes for innovative new technologies to reach consumers whilst reducing waste and removing some of the more harmful processes associated with the manufacturing such as the use of harsh chemicals. This is transformation science, which could place the UK at the leading edge of engineering innovation stimulating economic growth and opening up huge potential for innovation in many sectors from consumer electronics through to defence and space.
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