At the heart of this initiative is the creation of a shared laboratory facility capable of accommodating research from a diverse array of scientific disciplines and academic institutions. This facility will enable researchers to experiment with cutting-edge wireless technologies and sensing systems across an unprecedentedly wide frequency range. The testbed extends from conventional wireless bands to sub-terahertz frequencies, which are characterized by their ability to support ultra-high-speed data transmission and enhanced resolution in sensing applications. This expansive range opens new possibilities for advancements in wireless communications, radar imaging, and environmental sensing technologies.

The electromagnetic spectrum is a finite and heavily contested resource. Multiple stakeholders—from commercial telecommunications firms to government agencies and scientific researchers—vie for allocation of specific frequency bands. Traditional spectrum allocation methods, which often involve rigid partitioning, are becoming insufficient in addressing modern demands. As a result, the scientific community is actively exploring dynamic and intelligent spectrum-sharing strategies to maximize utilization. The new testbed at UAlbany is poised to play a critical role in this effort by providing a unique experimental platform for validating novel spectrum access techniques in real-world conditions.

Professor Dola Saha, leading the project within the Department of Electrical & Computer Engineering at UAlbany’s College of Nanotechnology, Science, and Engineering, emphasizes the importance of agility across a broad spectrum of frequencies. The testbed will be centered around a highly advanced research instrument known for its exceptional bandwidth capabilities. This instrument operates over a sweeping frequency range spanning from sub-6 GHz bands, typical of many cellular systems, to sub-terahertz frequencies, which remain largely unexplored territories for wireless communication research. Such range flexibility is unprecedented among wireless testbeds, allowing it to support a wide variety of experimental configurations.

Integrating this new instrument with the pre-existing NSF-funded CHRONOS wireless testbed will create a comprehensive platform that extends connectivity into optical and light-based frequencies. CHRONOS’s capabilities complement the new instrument’s, enabling simultaneous exploration of radio frequency and optical communication paradigms. By bridging these domains, the composite testbed facilitates research into hybrid communication and sensing technologies that leverage the unique advantages of each spectral region, pushing the envelope beyond traditional wireless systems.

The initiative addresses the critical need for a testbed capable of supporting experimental wireless research that transcends theoretical bounds. Historically, much of wireless communication research has been driven by simulations and analytical modeling, which, while invaluable, cannot capture all real-world complexities. This facility will empower researchers to conduct hands-on, experimental work involving wavefront engineering, intelligent reflecting surfaces, and waveform design tailored for adaptive radar and weather sensing applications. These advancements are pivotal for developing resilient, high-performance wireless networks of the future.

One remarkable feature of the testbed is its openness and collaborative ethos. Located within the Wireless Systems Laboratory in the CNSE Downtown Building, the facility will be accessible to faculty and students not only from UAlbany but also from partnering institutions such as SUNY Polytechnic Institute and Union College. This access is governed by a fair-share policy aimed at fostering broad collaborative research efforts across institutions. By democratizing access to sophisticated experimental infrastructure, the testbed aims to catalyze innovation and accelerate the translation of theoretical research into practical technologies.

The project is also strategically aligned with the United States government’s National Spectrum Strategy, which prioritizes maintaining U.S. leadership in wireless technology amid growing global competition. Developing expertise in frequency band identification and the optimization of spectrum usage is vital for securing national interests in communication security, technological competitiveness, and economic growth. The advanced wireless testbed enhances UAlbany’s role as a key player in this ecosystem, supporting pioneering research that contributes to the development of strategies and technologies for spectrum efficiency.

Training the next generation of engineers and scientists represents another core objective of the wireless testbed. The facility will serve as a hands-on learning environment where students can gain direct experience with state-of-the-art wireless instrumentation and system design. This experiential learning is invaluable in cultivating the skills required for future innovation in telecommunications, radar systems, and other sensing technologies. By bridging the gap between theoretical coursework and practical experimentation, the testbed assures a pipeline of talent equipped to tackle emerging wireless challenges.

The interdisciplinary nature of the testbed invites participation from diverse fields, including electrical engineering, computer science, physics, and materials science. This convergence facilitates holistic approaches to complex problems such as signal processing across multiple frequency bands and the design of intelligent surfaces that dynamically reflect and steer electromagnetic waves. Collaborative engagement across disciplines is central to unlocking new wireless technology paradigms that are adaptable, scalable, and robust to environmental variability.

Supporting this ambitious initiative, Professor Saha is joined by co-principal investigators Hany Elgala, Aveek Dutta, and Mustafa Aksoy, all esteemed colleagues within the Electrical & Computer Engineering Department. Their combined expertise spans wireless communications, signal processing, and instrumentation design, ensuring comprehensive stewardship of the testbed’s development and research activities. Together, their leadership fosters a dynamic environment where theoretical innovation meets experimental validation.

Ultimately, the establishment of this advanced wireless testbed represents a monumental leap forward in electromagnetic spectrum research infrastructure. By providing unprecedented bandwidth range, integrating optical frequencies, and enabling collaborative, multidisciplinary experimentation, the facility positions UAlbany at the forefront of global wireless research. The consequences of this work extend far beyond academia, promising transformative impacts on wireless communication systems that underpin modern society’s connectivity and technological progress.

Subject of Research: Advanced wireless communication technologies and electromagnetic spectrum management

Article Title: University at Albany Secures $1.3M NSF Award to Establish Cutting-Edge Advanced Wireless Testbed

News Publication Date: June 9, 2026

Web References:

• University at Albany News Center
• NSF Award CHRONOS

Image Credits: Brian Busher

Keywords

Applied Sciences and Engineering, Engineering, Electrical Engineering, Signal Processing, Bandwidth, Technology, Instrumentation, Laboratory Equipment, Telecommunications

Orbitally twisted EM waves, characterized by a helical phase front that spirals along the direction of propagation, carry OAM and thereby enable a unique new dimension to encode information. Unlike traditional methods relying solely on frequency, amplitude, and polarization, OAM allows for multiplexing multiple data channels simultaneously without mutual interference, potentially vastly expanding communication capacity. However, despite its alluring theoretical advantages, the practical deployment of OAM-based communication systems has encountered formidable challenges. Producing distinct OAM modes typically demands cumbersome optical or radio-frequency components, multiple redundant RF chains, and external modulators for each channel. This complexity translates into bulky devices, exorbitant energy consumption, and prohibitive costs, hampering scalability and commercialization.

In a groundbreaking advance reported in the journal Light: Science & Applications, a team of visionary scientists led by Professor Geng-Bo Wu from the State Key Laboratory of Terahertz and Millimeter Wave at City University of Hong Kong unveiled a novel class of dual-polarized asynchronous space–time–coding metasurfaces (DASM). This innovative platform can manipulate all fundamental attributes of vortex EM waves—including phase, amplitude, frequency, polarization, and momentum—in a highly integrated apparatus. By capitalizing simultaneously on multiple physical degrees of freedom such as OAM mode, polarization, and frequency, this metasurface architecture offers an unprecedented leap in multiplexing capability, enabling multiple independent data streams to coexist on a single compact aperture.

The DASM technology represents a paradigm shift from conventional beam-forming hardware to reconfigurable metasurfaces, ultrathin engineered surfaces composed of subwavelength elements capable of tailoring electromagnetic waves with exquisite precision. Unlike bulky mechanical or electronic systems, DASM can generate coaxial vortex beams carrying multiple OAM modes without the need for multiple apertures or complex assemblies. This optimization drastically reduces the footprint and power requirements. Moreover, the metasurface directly encodes the information onto the individual OAM channels, bypassing the need for bulky external modulators, mixers, and high-speed digital-to-analog converters that traditionally inflate system complexity and power consumption.

At the core of the DASM approach lies a sophisticated asynchronous space-time-coding scheme. This technique allows precise temporal and spatial modulation of the metasurface elements, enabling dynamic control over the emitted wavefront’s topological charge and polarization state. By individually addressing multiple OAM modes and polarizations at different frequencies, this platform orchestrates a high-dimensional multiplexing environment within a single aperture. The capacity to tune phase and amplitude further enriches the data encoding process, facilitating high-speed, parallel transmission of multiple data streams with minimal crosstalk and interference.

The implications of DASM for future wireless communication systems are profound. As data traffic skyrockets with emerging technologies such as augmented reality, 6G networks, and massive Internet of Things (IoT) ecosystems, achieving high throughput with energy efficiency is paramount. DASM’s compact and integrated design promises not only to amplify wireless capacity explosively but also to simplify transmitters through its software-defined architecture. Its ability to write data directly onto multiple EM wave channels obviates the need for traditional multi-chain architectures, leading to reduced hardware costs and enhanced reliability.

Additionally, the versatility of DASM opens new avenues beyond wireless communication. The approach lends itself well to short-range applications where space and energy constraints are stringent. This includes wireless power transfer systems that demand directional and multiplexed energy delivery, intra-device communications where multiple data channels must coexist within a compact module, and data center interconnections that require ultra-high-speed, low-latency communication links. The adaptability of DASM to different frequency bands and polarization modes underscores its transformative potential across diverse technological domains.

The team’s comprehensive evaluation of the system demonstrates notable improvements in spectral efficiency and channel isolation due to the orthogonality of OAM modes combined with polarization and frequency multiplexing. This tripartite exploitation of degrees of freedom effectively multiplies channel density without significantly increasing complexity or error rates. Crucially, this simultaneously addresses a key concern with OAM systems: mode purity and interference mitigation, which are critical for real-world adoption.

From a theoretical perspective, the ability to harness vortex EM waves’ helical phase profiles and encode information directly on multiple layers paves the way for a new communication framework. Unlike conventional spatial multiplexing that merely reuses spatial domains, the DASM-modulated OAM channels add a fundamentally new dimension of information encoding, taking wireless communications into a realm hitherto only speculated in physics. This could inspire future standards and protocols explicitly designed to exploit such high-dimensional structured waves.

Despite these promising advances, challenges remain before DASM can be widely integrated into commercial systems. Factors such as fabrication tolerances, environmental robustness, and seamless integration with existing RF infrastructures need to be thoroughly addressed. Nonetheless, the prototype and proof-of-concept experiments showcased by Professor Wu’s team provide compelling evidence that these hurdles are surmountable. The work stands as a visionary milestone that bridges electromagnetic theory, nanofabrication, and communication engineering in pursuit of next-generation high-capacity wireless links.

In conclusion, the dual-polarized asynchronous space-time-coding metasurface represents a transformative leap in electromagnetic wave manipulation and wireless communication technology. By synergistically combining multiple physical degrees of freedom—OAM, polarization, and frequency—within a single compact aperture, it unlocks a paradigm of high-dimensional multiplexing and efficient data encoding. This breakthrough heralds the dawn of ultra-compact, energy-efficient, software-defined transmitters that could revolutionize wireless capacity and enable a new generation of ultra-fast, highly connected devices. The future wireless landscape may well be shaped by the elegant twisted waves engineered by such metasurfaces, signaling boundless opportunities in communication, power transfer, and beyond.

Subject of Research: Dual-polarized asynchronous space-time-coding metasurfaces for high-dimensional multiplexing of vortex electromagnetic waves

Article Title: High-dimensional multiplexing through vortex electromagnetic wave manipulation by space-time-coding metasurfaces

News Publication Date: Not explicitly provided in the source text

Web References: Not provided

References: DOI 10.1038/s41377-026-02232-6

Image Credits: Geng-Bo Wu et al.