New Nanoscale Ceramic Film Fine-Tunes Microwave Signals with Minimal Power Loss

By manipulating atoms inside ultra-thin ceramic layers, researchers from Queen Mary University of London have unlocked materials that can 'tune' their behavior in real time, resulting in extremely efficient and sensitive devices.

The study reveals how the team, led by Professor Yang Hao from Queen Mary's Centre for Electronics, engineered microscopic structures called polar nanostructures inside a unique ceramic film, creating materials that can 'tune' their electrical behavior at microwave frequencies used in devices such as sensors and 5G antennae. The findings have been published in Nature Communications. 

Modern sensing and communications systems rely on materials that can adjust their interaction with signals by changing frequency, improving sensitivity, or reducing interference. Until recently, it has been a great challenge to create materials that can achieve this efficiently and effectively. 

The team overcame these challenges by controlling the internal structure of a thin ceramic layer. This method enables the material to alter its electrical response with less power and minimal signal loss, two challenges that have previously limited designs. Their optimized film exhibited microwave tunability of approximately 74 % at 6 GHz.

By engineering the material at the nanoscale, we can achieve strong and stable tunability without compromising performance.

This opens the door to a new generation of reconfigurable wireless and sensing devices that are faster, smaller and more energy-efficient.

Professor Yang Hao, Queen Mary's Center for Electronics

This development could have a far-reaching impact across multiple industries, including mobile networks, satellite communications, and medical imaging. Devices with high levels of adaptability to changing environments are central to future advancements in sustainable, intelligent electronics. 

Beyond real-world uses, these developments offer new insights into how materials behave at an incredibly small scale, for example, how tiny polar regions may boost performance at high frequencies. 

The research team is now exploring the integration of these tunable films into working components, and the scaling up of the manufacturing process for practical applications.

Journal Reference:

Ruan, H. et.al. (2025) Engineering polar nanoclusters for enhanced microwave tunability in ferroelectric thin films. Nature Communications. doi.org/10.1038/s41467-025-64642-1