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High-Frequency, Low-Power: Researchers Develop Switch To Revolutionize 6G Communications

July 15, 2024
in Science
High-Frequency, Low-Power: Researchers Develop Switch To Revolutionize 6G Communications
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5G Smart City Concept

UAB researchers have developed an innovative switch for 6G communications that doubles performance to 120 GHz and reduces energy use, promising enhanced sustainability and efficiency in telecommunications.

The device, a telecommunications switch, enhances sustainability and offers twice the performance of existing devices.

Researchers at UAB developed a telecommunications switch that operates at extremely high frequencies while consuming less power than traditional technologies. This innovation, suitable for upcoming 6G communication systems, offers enhanced sustainability through reduced energy usage. The findings were recently published in Nature Electronics.

An indispensable element for controlling signals in electronic communication devices is the switch, whose function is to allow an electrical signal to pass (ON state) or to block it (OFF state). The fastest elements currently used to perform this function are silicon-based (the so-called RF silicon-on-insulator MOSFET switches) and operate using signals with frequencies of tens of gigahertz (GHz).

However, they are volatile, i.e., they require a constant power source to maintain the ON state. To improve current communication systems and meet the demand for increasingly faster communications that will involve the Internet of Things (IoT) and the popularisation of virtual reality, it is necessary to increase the frequency of the signals with which these elements are able to act, and improve their performance.

Breakthrough in Switch Technology

An international collaboration involving researchers from the UAB Department of Telecommunications and Systems Engineering has developed a switch that, for the first time, is capable of performing at twice the operating frequency of current silicon-based devices, with a frequency range of up to 120 GHz, and without the need to apply a constant voltage.

The new switch uses a non-volatile material, called hBN (Hexagonal Boron Nitride), which allows its ON or OFF state to be activated by applying an electrical voltage pulse instead of a constant signal. In this way, the energy savings that can be attained are very significant.

Memristive Circuits Based on Multilayer Hexagonal Boron Nitride for Millimeter Wave Radiofrequency Applications

Microscope image of the device published in Nature Electronics. Credit: Universitat Autonoma de Barcelona

“Our research team from the Department of Telecommunications and Systems Engineering at the UAB was involved in the design of the devices and their experimental characterization in the laboratory,” explains researcher Jordi Verdú. “For the first time we have been able to demonstrate the operation of a switch based on hBN, a non-volatile material, in a frequency range of up to 120 GHz, which suggests the possibility of using this technology in the new 6G mass communications systems, where a very high number of these elements will be required.” For Verdú, this is a “very important contribution, not only from the point of view of device performance but also towards a much more sustainable technology in terms of energy consumption.”

These devices work thanks to the property of memristance, the change in electrical resistance of a material when a voltage is applied. Until now, very fast switches had been developed experimentally from memristors (devices with memristance) created with two-dimensional networks of hexagonal boron nitride (hBN) bonded together to form a surface. With this arrangement, the device frequency could reach up to 480 GHz, but only for 30 cycles, i.e., with no practical application. The new proposal uses the same material but arranged in a superposition of layers (between 12 and 18 layers in total) that can operate at 260 GHz and with sufficiently high stability of about 2000 cycles to be implemented in electronic devices.

Reference: “Memristive circuits based on multilayer hexagonal boron nitride for millimetre-wave radiofrequency applications” by Sebastian Pazos, Yaqing Shen, Haoran Zhang, Jordi Verdú, Andrés Fontana, Wenwen Zheng, Yue Yuan, Osamah Alharbi, Yue Ping, Eloi Guerrero, Lluís Acosta, Pedro de Paco, Dimitra Psychogiou, Atif Shamim, Deji Akinwande and Mario Lanza, 1 July 2024, Nature Electronics.
DOI: 10.1038/s41928-024-01192-2

The research, recently published in the journal Nature Electronics, was coordinated by the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, with the involvement of researchers from the Department of Telecommunications and Systems Engineering at the UAB Jordi Verdú, Eloi Guerrero, Lluís Acosta and Pedro de Paco, as well as researchers from the University of Texas at Austin (USA), the Tyndall National Institute and University College Cork (both in Ireland).

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/high-frequency-low-power-researchers-develop-switch-to-revolutionize-6g-communications/

Tags: high-frequencyLow-Powerscience
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