Murata has announced the release of the BLF03VK series of ultra-compact noise filters specifically designed for the five gigahertz band, one of the frequency ranges used in WiFi (wireless LAN) communications. The filters are the first in the world to have a specified, guaranteed impedance value at five gigahertz.
The five gigahertz band for WiFi is known as a high-speed transportation band. However, when a device self-generates noise in this frequency band it interferes with the signal received, resulting in a lower data processing performance and slower transmission. Murata’s new BLF03VK series of noise filters suppress noise in the five gigahertz band that interferes with WiFi signals, thereby contributing to improved data processing capability and faster data transmission.
Aimed at companies designing wireless communication equipment with a WiFi function and those producing 5G equipment such as smartphones, tablet PCs, base stations, WiFi modules, etc., the lineup currently comprises two models: the BLF03VK221SNG with a specified impedance of 220 ohms at five gigahertz, 0.8A rated current, and the BLV03VK600SNL specified as 60 ohms at five gigahertz, 1.2A rated current.
The parts’ impedance frequency characteristics are controlled to maximise noise suppression in the five gigahertz band, they feature a low DC resistance, and they save on space, with a compact size of just 0.6x0.3mm.
Murata has previously offered several series of noise filters for targeted frequency bands that guarantee impedance in the relevant bands. These are the BLF02RD_GN series of noise filters supporting the 2.4GHz band, and the BLF03JD_GN series and BLF02GD_GN series supporting the 700 MHz band.
The BLF03VK series of noise filters supporting the five gigahertz band also improve communication sensitivity in WiFi environments for smartphones and other devices. Murata has begun mass production of the series, and will continue to develop products that respond to the demands of the market in a timely manner.