The high-frequency filter is now in production. It helps phones and Wi-Fi work better by reducing noise and picking the right signals.
Murata Manufacturing Co., Ltd. has started mass production and shipment of the world’s first high-frequency filter based on XBAR technology. This filter combines Murata’s surface acoustic wave (SAW) filter expertise with XBAR technology developed by its subsidiary, Resonant Inc. It is designed to operate in the 5150–7125 MHz frequency range and features a typical insertion loss of 2.2 dB and return loss of 17 dB.
The filter structure uses comb-shaped electrodes and a piezoelectric thin film to generate bulk acoustic waves. It delivers 11 dB attenuation at 4800–5000 MHz, 28 dB at 3300–4800 MHz, 27 dB at 7737–8237 MHz, and 26 dB at 10300–14250 MHz. It supports operation in high-frequency bands required by modern wireless standards like 5G, Wi-Fi 6E, Wi-Fi 7, and future 6G.
These features allow the filter to provide strong attenuation, wide bandwidth, and low signal loss in the high-frequency spectrum. The bulk acoustic wave generation helps suppress unwanted signals and reduce high-frequency noise, especially above 3 GHz. This structure also allows the filter to be integrated into compact device designs.
As wireless systems evolve toward higher frequencies and faster speeds, conventional filter technologies like LTCC and standard BAW often struggle to meet performance needs. The XBAR filter addresses these limitations by offering better signal control and higher frequency coverage in a smaller footprint.
For end users and manufacturers, these technical improvements translate into real-world benefits. Devices using XBAR filters can achieve more reliable wireless communication, reduced interference, and better power efficiency. This is especially valuable in space-constrained and battery-operated products like smartphones, wearables, laptops, and communication gateways.
The company also plans to expand the XBAR filter architecture to cover even higher frequency bands above 10 GHz. This supports ongoing development of next-generation wireless technologies, enabling future-ready devices that can keep pace with evolving connectivity standards.
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