Long Beach, Calif. Integrated Circuit Systems, Inc. (ICS) has expanded its product portfolio for 3G infrastructure applications with the introduction of seven new high-performance surface acoustic wave (SAW) products for use as intermediate-frequency (IF) filters for all third-generation (3G) base station equipment protocols.
ICS now offers a wide range of standard 70- to 350-MHz IF SAW bandpass filters to meet the most performance requirements of 3G infrastructure protocols including WCDMA/UMTS, CDMA2000, and TD-SCDMA. The new filters are available in a variety of bandwidths to match the requirements for single-, two-, and three-carrier systems.
The company said that proprietary ICS software and modeling technology allows the filters to be designed for excellent selectivity while maintaining relatively low loss and extremely flat passband with very low group delay ripple. This provides base station designers with high-end filters that are critical to achieving maximum system performance, said the company.
For example, the SF0140BA03107S, designed for a two-carrier system, is centered at 140 MHz and has a 10 MHz bandwidth. This filter offers an excellent 35-dB rejection bandwidth of 14 MHz, a low insertion loss of 8 dB, and an ultra-low amplitude ripple of 0.25 dB.
The company's standard product offering centered at 140 MHz has been expanded to cover nearly any bandwidth required for base station amplifiers, repeaters, and transceivers, and has added new parts at 240 and 350 MHz to provide IF filters suitable for higher-frequency
SAW filters for single-carrier 3G-CDMA systems are now available at 69.99, 141, 240, and 350 MHz. Custom devices are available within this range to meet a base station provider's frequency plan. All of the new SAW devices are lead-free and RoHS-compliant.
All 17 standard SAW filters for 3G base station applications are in production and available now. Pricing starts at $15 in quantities of 1,000 for the SAW filters in SMP1306 (13.3 x 6.5 mm) packages.
ICS SAW product division, 1-800-544-0052, www.icst.com