Compact and wideband nanoacoustic pass-band filters for future 5G and 6G cellular radios

Abstract

Over recent years, the surge in mobile communication has deepened global connectivity. With escalating demands for faster data rates, the push for higher carrier frequencies intensifies. The 7–20 GHz range, located between the 5G sub-6 GHz and the mm-wave spectra, provides an excellent trade-off between network capacity and coverage, and constitutes a yet-to-be-explored range for 5G and 6G applications. This work proposes a technological platform able to deliver CMOS-compatible, on-chip multi-frequency, low-loss, wide-band, and compact filters for cellular radios operating in this range by leveraging the micro-to-nano scaling of acoustic electromechanical resonators. The results showcase the first-ever demonstrated low insertion loss bank of 7 nanoacoustic passband filters in the X-band. Most of the filters showcase fractional bandwidths above 3% and sub-dB loss per stage in an extremely compact form factor, enabling the manufacturing of filters and duplexers for the next generation of mobile handsets operating in the X-band and beyond.

Recent progress on structural coloration

“…We want to emphasize that the research on structural colors is essentially developing powerful processors for spectral information with extremely high spatial resolution and spectral accuracy. Although developed originally for visible light, the spectral processing capabilities of structural coloration are transferrable to all parts of the spectrum, including the terahertz waves that are expected to be the range for 6G wireless communications [318,319] . The ability to modulate the spectral information with high spatial resolution can become a game-changing technique for enabling high-throughput information processing for both free-space and fiber-optics systems.…”

Achieving Ultra-Broad Microwave Absorption Bandwidth Around Millimeter-Wave Atmospheric Window Through an Intentional Manipulation on Multi-Magnetic Resonance Behavior

“…The rapid development of 5G technology has led to a new booming situation in various high-tech industries. This is primarily due to the incorporation of the millimeter-wave range of 25-52.6 GHz in FR2, which offers advantages such as high energy and wide bandwidth for faster network speeds [1][2][3][4]. Meanwhile, thanks to its superior attributes including high resolution and all-weather capabilities, the millimeterwave around atmospheric window of 35 GHz has emerged as an optimal choice for next-generation radar detection [5].…”

A Distributed Magnetostatic Resonator

“…Digital Object Identifier 10.1109/TMTT.2024.3381549 low loss, wide bandwidth filters remains an active area of research [6], [7], [8], [9], [10], [11]. Filters based on magnetic materials such as yttrium iron garnet (YIG) have been an attractive technology for many years due to the material's magnetically tunable dispersion relationship and low Gilbert damping.…”