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13 Qorvo 2022 to bandwidth. Discussions on this topic are currently taking place in China. What is the best filter technology to tackle these V2X coexistence challenges? Qorvo has helped numerous companies leverage Bulk Acoustic Wave filters for these types of applications, as we will outline below. Bulk Acoustic Wave (BAW) filters Avoiding interference in the cases outlined above calls for high-performance RF bandpass filters that can operate at high frequencies. BAW is well-suited for this high frequency operation. BAW filters also provide steep skirts to prevent signals from bleeding into adjacent bands and enable low insertion loss across the passband to sustain output power and maximize signal range. The automotive environment requires reliable operation over the life of the vehicle, under extreme temperature and humidity as well as vibration (quartz crystal filters will not work here). Employing BAW filters in these challenging automotive conditions means engineers can now replace larger, harder-to-implement filter technology. BAW filters uniquely possess the needed characteristics and will have all the capabilities required for the 5.9GHz band. Such filters provide the necessary steep skirts and high quality (Q) factors of up to 3,000, with a far smaller footprint than traditional ceramic or dielectric filters. BAW filters provide precise selectivity and small size and are perfectly suitable for advanced RF applications in vehicles. These filters are typically used for applications above 1.5GHz where high performance is required. Additionally, the technology is fundamentally capable of working at frequencies up to 7GHz and beyond. Figure 4: Electronic Toll Collection versus V2X bands. A Front-end Solution Qorvo offers BAW filter technology in discrete form and in modules. The Qorvo V2X Front-end suite has the first Band 47/Wi-Fi BAW coexistence filter that enables Wi-Fi coexistence with the V2X 5.9GHz band. This provides the ability to establish reliable links between vehicles and their surroundings. In addition, it includes two integrated front-end modules (FEMs) that support C-V2X and DSRC systems, a digital step attenuator, transmit/receive switch, and low noise amplifier. This front-end is chipset agnostic and enables a reliable V2X link with sufficient transmit linear power and excellent receive performance in a Wi-Fi environment where Wi-Fi and V2X coexists.There will be much more to come on this topic as we progress along the path of safe driving via high tech electronics innovations in road vehicles with wireless technology advancements. Qorvo QPF1003Q Wi-Fi Front-End Module for Automotive LEARN MORE >