FBAR-based bandpass filters for 4G Wimax handsets

An Avago Technologies product story

Edited by the Electronicstalk editorial team Aug 23, 2010

Avago Technologies has launched two advanced Film Bulk Acoustic Resonator (FBAR) technology-based bandpass filters for next-generation 4G Wimax/LTE handsets, data cards and access points.

The Avago ACPF-7024 and ACPF-7025 are a pair of highly selective bandpass filters that enable mobile phones to offer simultaneous operation of next-generation 4G Wimax/LTE voice communications and Wi-Fi/Bluetooth data networks without compromising voice or data quality of service.

The ACPF-7024 enables the concurrent operation of Wi-Fi and/or Bluetooth with other wireless standards - such as 2.5GHz Wimax, PCS and LTE Bands 7 and 40 - without performance degradation due to adjacent radio interference.

The ACPF-7024 is a 2,400-2,482MHz Wi-Fi/Bluetooth bandpass filter designed for use in the 2.4GHz ISM1 band and features over 40dB of attenuation to interfering signals.

Avago's ACPF-7025 is a miniature 2,496-2,690MHz Wimax bandpass filter combined with a WLAN/Wi-Fi band-reject filter.

The ACPF-7025 allows a Wimax transceiver to coexist and operate alongside Wi-Fi and/or Bluetooth transmitters.

Cell band rejection is 60dB typical; PCS band rejection is 43dB typical; and Wi-Fi/WLAN/Bluetooth rejection is 43dB typical.

Both the ACPF-7024 and ACPF-7025 use Avago's proprietary Film Bulk Acoustic Resonator (FBAR) technology that makes ultra-small, high-Q filters possible at a fraction of their usual size.

By utilising Avago's advanced Microcap bonded-wafer chip-scale packaging and proprietary FBAR filter technologies, the ACPF-7024 and ACPF-7025 are assembled into moulded chip-on-board modules with a compact size of 2.5 x 2.5mm and 2.0 x 1.6mm respectively.

Applications for the ACPF-7024 and ACPF-7025 include 4G/LTE mobile and 802.11 b/g/n WiLAN/Wi-Fi and Bluetooth data communications in handsets and portable communication devices such as laptops, netbooks and tablet devices.