Palo Alto, C.A.Agilent Technologies Inc. announced a film bulk acoustic resonator (FBAR) full-band transmit filter for handsets, data cards and other wireless products operating in the U.S. personal communications services (PCS) frequency band. Compared with full-band surface acoustic wave (SAW) transmit filters, the ACPF-7002 filter provides superior performance in an equivalent or smaller package.
The device features 35 dB minimum rejection, with 45 dB typical in the 1930-1990 MHz receive band, 2.5 dB typical insertion loss, and 25dB image rejection at 1830 MHz.
Many CDMA handset designs use two SAW split-band filters to cover the 1850-1880 MHz and 1880-1910 MHz portions of the PCS transmit frequency range, with the appropriate filter selected via a radio-frequency switch. This device eliminates the need for a second filter, an RF switch, and associated passive components. This can reduce the printed circuit board area required for the transmit filter by up to 90 percent, while lowering manufacturing costs and eliminating the need for interface design and programming.
The filter is assembled in a molded-chip-on-board module that is less than 1.0 mm high with a 1.6 mm x 2.0 mm footprint. It is specified over the -30C to +85C operating temperature range.
The ACPF-7003 is priced at $0.55 each in 100,000-piece quantities. Click here for the ACPF-7003 data sheet.
Agilent Semiconductor Products,