Resonant Rods RF Filters for 5G Technology
We explain how the new XBAR resonator technology is optimized to create filters for 5G and WiFi networks. “We are working with several RF module and filter suppliers for 4G and 5G filters and have recently achieved a major milestone that will lead to mass production of critical 5G RF filters,” said PAX.
The proliferation of 4G LTE networks, the deployment of new 5G networks, and the ubiquity of Wi-Fi have led to a dramatic increase in the number of radio frequency bands that smartphones and other mobile devices must support. RF filters are not new and our smartphones would not work without them. The first generation of smartphones had fewer than 10 filters because they didn’t have many RF signals. Today—using Wi-Fi, Bluetooth, GPS, and 2G, 3G, 4G, and now 5G—more than 100 filters are trying to prevent conflicting signals coming into your phone.
However, 5G networks are not ready for prime time. The challenge is that each 5G band must be isolated with filters to avoid interference that can drain battery life, reduce data rates, and cause dropped calls. Today, filter technology cannot deliver the performance these new networks promise.
We are now focusing on 5G communication accessories because the requirements have changed dramatically compared to 4G filters. If you look at the iPhone 13, there are nearly 100 sonic filters; in the iPhone 13, one filter is required for each frequency band that needs to be processed in the phone. As we look at 5G, higher frequencies, wider bandwidths and more complexities, it is clear that the market needs a different type of acoustic building blocks for these filters. That’s why we’ve developed technology to address new markets in the 5G and Wi-Fi bands 5 GHz and 6 GHz, and ultra-wideband (UWB) from 6 to 8 GHz.