Feature: Wireless Technology


semiconductor technology, particularly in the aforementioned GaN, are helping to address this. With improvements in GaN, including smaller transistor sizes and more efficient designs, it’s possible to increase power output whilst improving efficiency. To tackle thermal issues, materials


like copper-tungsten or diamond heat- spreaders can be used and potentially combined with innovative cooling techniques, such as liquid cooling. These solutions are critical to ensuring systems continue to function effectively in the challenging environments of satellites and military operations. GaN is key in these efforts. Its high


breakdown voltages and excellent thermal conductivity make it perfect for high-frequency applications. However, it’s not without challenges. GaN devices tend to generate high heat with hot spots around transistors, sometimes reaching over 300°C, which can lead to system failures without effective thermal management.


At Filtronic we are tackling thermal


management by using waveguide combined amplifier structures, to provide very high power whilst spreading thermal loads across multiple devices, instead of concentrating them in one spot. Along with conventional forced-air cooling methods, there’s also the option to use liquid cooling for high-power configurations, giving more flexibility for future system designs.


Significant potential The Q/V band holds significant potential to transform satellite communications, offering faster speeds, more secure connections and greater efficiencies. Whilst there are challenges to overcome — from system design to thermal management and GaN production — the industry is making great strides toward solving them. With innovations in semiconductor


technology, such as solid-state amplifiers, Q/V band will play a key role in the future of communications.


10 July/August 2025 www.electronicsworld.co.uk


Projects like the ARTES initiative and efforts at companies like Filtronic are pushing this technology forward — and we’re just scratching the surface of what is possible by harnessing this band. The Q/V band is bringing us closer to


a future where data bandwidth capacity will be significantly increased. Whether it’s for global networks or scientific missions, the future is looking bright and Q/V band is going to be at the heart of it.


ABOUT FILTRONIC:


Filtronic is an RF- and mm- wave products specialist, being at the forefront of RF technologies for 45 years. The company is known for high performance, innovation, quality and high reliability, and its focus on mission-critical communications for aerospace, defence, space, telecommunications infrastructure and critical communications.


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