Avago Announces Smallest Duplexers

(Product News, 2 Mar 2006)

Avago Technologies has announced two FBAR (film bulk acoustic resonator) duplexers for handsets, PC data cards and other wireless products operating in the U.S. PCS (personal communications service) and UMTS (Universal Mobile Telecommunications System) frequency bands. Both duplexers are housed in small, packages featuring a height of 1.3 mm, with a 3.8 mm by 3.8 mm footprint. These dimensions also enable miniature RF modules with increased functionality to be embedded into other portable consumer appliances. The FBAR technology offers smaller size compared to competitive SAW (surface acoustic wave) and ceramic duplexers. The FBAR duplexers achieve their miniature size through innovative Microcap bonded-wafer chip scale packaging. Duplexers play a role in CDMA and W-CDMA (wideband code division multiple access) mobile phones and data cards by separating incoming communications from outgoing communications to allow for simultaneous two-way voice or data transmission.
The ACMD-7601 achieves a 47 percent smaller footprint and 0.4 mm thinner profile than the smallest available ceramic duplexers. The device enhances sensitivity and dynamic range of UMTS receivers while extending handset battery life by minimizing the power amplifier’s current drain. All specifications are over the –30 C to +85 C temperature range: Handles up to +33 dBm transmit power Minimum receiver noise blocking of 45 dB Minimum transmit interferer blocking of 51 dB Maximum receive frequency insertion loss of 2 dB Maximum transmit frequency insertion loss of 1.6 dB
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