What if antennas could control multiple frequencies at once? A new technology could change our thoughts about wireless communication, 6G networks, and more.
Flexible frequency control is essential in communications, spectroscopy, and quantum processing. Current methods have limited control over frequencies, allowing only a few harmonic orders to be manipulated. A research team at the City University of Hong Kong (CityUHK) has announced an advancement in antenna technology that could impact wireless communications, particularly for the upcoming 6th generation (6G) networks.
The team have proposed a new solution that allows metasurfaces to generate and control multiple harmonic frequencies simultaneously. This is achieved by combining several basic sine waves into one moving envelope inspired by video production techniques. The synthetic antenna demonstrates key functions like frequency transitions, frequency comb generation, and harmonic control using simple 1-bit ON-OFF switching. The design suppresses unwanted harmonics and integrates seamlessly with other components. This approach greatly improves control over metasurfaces and has potential applications in wireless communication, spectroscopy, and quantum science, with the ability to impact multiple fields.
Traditional antennas are fixed in their capabilities. The researchers introduced a new antenna concept called a “synthesis moving envelope.” This technology allows antennas to generate harmonic frequencies and control their wave properties through software.
This is the first reported antenna with these capabilities, marking a step forward in antenna design. The technology could have applications in next-generation information systems, imaging, and wireless power transfer.
The antenna can simultaneously transmit multiple signals to users in different directions, significantly increasing channel capacity. Additionally, this innovation advances the integration of sensing and communications, which is essential for 6G wireless networks, with significant implications for future communication systems. Researchers explained that the proposed synthesis approach enhances the spectral controllability of the metasurfaces to a new level.
The team noted that the unique frequency controllability, straightforward 1-bit coding strategy, sideband-proof feature, and potential for on-chip integration make the proposed metasurface antenna a significant advancement beyond existing technologies. This innovation holds promising potential in wireless communications, cognitive radar, integrated photonics, and quantum science.
